trunk/src/emu/cpu/lc8670/lc8670.c
| r0 | r19051 | |
| 1 | /****************************************************************************** |
| 2 | |
| 3 | Sanyo LC8670 "Potato" CPU core |
| 4 | by Sandro Ronco |
| 5 | |
| 6 | Based on: |
| 7 | - Sega VMU hardware manual |
| 8 | - Sanyo LC86104C datasheet |
| 9 | |
| 10 | TODO: |
| 11 | - SIO |
| 12 | - HOLD state |
| 13 | |
| 14 | ******************************************************************************/ |
| 15 | |
| 16 | #include "emu.h" |
| 17 | #include "debugger.h" |
| 18 | #include "lc8670.h" |
| 19 | |
| 20 | //*************************************************************************** |
| 21 | // DEBUGGING |
| 22 | //*************************************************************************** |
| 23 | |
| 24 | #define LOG_TIMERS 0 |
| 25 | #define LOG_IRQ 0 |
| 26 | |
| 27 | |
| 28 | //************************************************************************** |
| 29 | // CONSTANTS |
| 30 | //************************************************************************** |
| 31 | |
| 32 | const device_type LC8670 = &device_creator<lc8670_cpu_device>; |
| 33 | |
| 34 | |
| 35 | //************************************************************************** |
| 36 | // MACROS |
| 37 | //************************************************************************** |
| 38 | |
| 39 | // registers |
| 40 | #define REG_A m_sfr[0x00] |
| 41 | #define REG_PSW m_sfr[0x01] |
| 42 | #define REG_B m_sfr[0x02] |
| 43 | #define REG_C m_sfr[0x03] |
| 44 | #define REG_TRL m_sfr[0x04] |
| 45 | #define REG_TRH m_sfr[0x05] |
| 46 | #define REG_SP m_sfr[0x06] |
| 47 | #define REG_PCON m_sfr[0x07] |
| 48 | #define REG_IE m_sfr[0x08] |
| 49 | #define REG_IP m_sfr[0x09] |
| 50 | #define REG_EXT m_sfr[0x0d] |
| 51 | #define REG_OCR m_sfr[0x0e] |
| 52 | #define REG_T0CNT m_sfr[0x10] |
| 53 | #define REG_T0PRR m_sfr[0x11] |
| 54 | #define REG_T0LR m_sfr[0x13] |
| 55 | #define REG_T0HR m_sfr[0x15] |
| 56 | #define REG_T1CNT m_sfr[0x18] |
| 57 | #define REG_T1LC m_sfr[0x1a] |
| 58 | #define REG_T1LR m_sfr[0x1b] |
| 59 | #define REG_T1HC m_sfr[0x1c] |
| 60 | #define REG_T1HR m_sfr[0x1d] |
| 61 | #define REG_MCR m_sfr[0x20] |
| 62 | #define REG_STAD m_sfr[0x22] |
| 63 | #define REG_CNR m_sfr[0x23] |
| 64 | #define REG_TDR m_sfr[0x24] |
| 65 | #define REG_XBNK m_sfr[0x25] |
| 66 | #define REG_VCCR m_sfr[0x27] |
| 67 | #define REG_SCON0 m_sfr[0x30] |
| 68 | #define REG_SBUF0 m_sfr[0x31] |
| 69 | #define REG_SBR m_sfr[0x32] |
| 70 | #define REG_SCON1 m_sfr[0x34] |
| 71 | #define REG_SBUF1 m_sfr[0x35] |
| 72 | #define REG_P1 m_sfr[0x44] |
| 73 | #define REG_P1DDR m_sfr[0x45] |
| 74 | #define REG_P1FCR m_sfr[0x46] |
| 75 | #define REG_P3 m_sfr[0x4c] |
| 76 | #define REG_P3DDR m_sfr[0x4d] |
| 77 | #define REG_P3INT m_sfr[0x4e] |
| 78 | #define REG_FPR m_sfr[0x54] |
| 79 | #define REG_I01CR m_sfr[0x5d] |
| 80 | #define REG_I23CR m_sfr[0x5e] |
| 81 | #define REG_ISL m_sfr[0x5f] |
| 82 | #define REG_VSEL m_sfr[0x63] |
| 83 | #define REG_VRMAD1 m_sfr[0x64] |
| 84 | #define REG_VRMAD2 m_sfr[0x65] |
| 85 | #define REG_BTCR m_sfr[0x7f] |
| 86 | |
| 87 | // addressing modes |
| 88 | #define GET_D9 (((m_op & 0x01)<<8) | fetch()) |
| 89 | #define GET_D9B3 (((m_op & 0x10)<<4) | fetch()) |
| 90 | #define GET_I8 fetch() |
| 91 | #define GET_R8 fetch() |
| 92 | #define GET_RI (m_op & 0x03) |
| 93 | #define GET_B3 (m_op & 0x07) |
| 94 | #define GET_A12 (((m_op & 0x10)<<7) | ((m_op & 0x07)<<8) | fetch()) |
| 95 | #define SIGNED(v) ((v) - (BIT(v,7) ? 0x100 : 0)) |
| 96 | |
| 97 | // flags |
| 98 | #define FLAG_CY 0x80 |
| 99 | #define FLAG_AC 0x40 |
| 100 | #define FLAG_OV 0x04 |
| 101 | #define FLAG_P 0x01 |
| 102 | #define GET_CY BIT(REG_PSW,7) |
| 103 | #define GET_AC BIT(REG_PSW,6) |
| 104 | #define GET_OV BIT(REG_PSW,2) |
| 105 | #define GET_P BIT(REG_PSW,0) |
| 106 | #define SET_CY(v) { if (v) REG_PSW |= FLAG_CY; else REG_PSW &= ~FLAG_CY; } while(0) |
| 107 | #define SET_AC(v) { if (v) REG_PSW |= FLAG_AC; else REG_PSW &= ~FLAG_AC; } while(0) |
| 108 | #define SET_OV(v) { if (v) REG_PSW |= FLAG_OV; else REG_PSW &= ~FLAG_OV; } while(0) |
| 109 | #define CHECK_P() check_p_flag() |
| 110 | |
| 111 | // CPU state |
| 112 | #define HALT_MODE 0x01 |
| 113 | #define HOLD_MODE 0x02 |
| 114 | |
| 115 | |
| 116 | //************************************************************************** |
| 117 | // Opcodes Table |
| 118 | //************************************************************************** |
| 119 | |
| 120 | const lc8670_cpu_device::op_handler lc8670_cpu_device::s_opcode_table[] = |
| 121 | { |
| 122 | &lc8670_cpu_device::op_nop , &lc8670_cpu_device::op_br , &lc8670_cpu_device::op_ld , &lc8670_cpu_device::op_ld , &lc8670_cpu_device::op_call, // 0x0* |
| 123 | &lc8670_cpu_device::op_callr, &lc8670_cpu_device::op_brf , &lc8670_cpu_device::op_st , &lc8670_cpu_device::op_st , &lc8670_cpu_device::op_call, // 0x1* |
| 124 | &lc8670_cpu_device::op_callf, &lc8670_cpu_device::op_jmpf, &lc8670_cpu_device::op_mov , &lc8670_cpu_device::op_mov , &lc8670_cpu_device::op_jmp, // 0x2* |
| 125 | &lc8670_cpu_device::op_mul , &lc8670_cpu_device::op_be , &lc8670_cpu_device::op_be , &lc8670_cpu_device::op_be_ri, &lc8670_cpu_device::op_jmp, // 0x3* |
| 126 | &lc8670_cpu_device::op_div , &lc8670_cpu_device::op_bne , &lc8670_cpu_device::op_bne , &lc8670_cpu_device::op_bne_ri, &lc8670_cpu_device::op_bpc, // 0x4* |
| 127 | &lc8670_cpu_device::op_ldf , &lc8670_cpu_device::op_stf , &lc8670_cpu_device::op_dbnz, &lc8670_cpu_device::op_dbnz, &lc8670_cpu_device::op_bpc, // 0x5* |
| 128 | &lc8670_cpu_device::op_push , &lc8670_cpu_device::op_push, &lc8670_cpu_device::op_inc , &lc8670_cpu_device::op_inc , &lc8670_cpu_device::op_bp, // 0x6* |
| 129 | &lc8670_cpu_device::op_pop , &lc8670_cpu_device::op_pop , &lc8670_cpu_device::op_dec , &lc8670_cpu_device::op_dec , &lc8670_cpu_device::op_bp, // 0x7* |
| 130 | &lc8670_cpu_device::op_bz , &lc8670_cpu_device::op_add , &lc8670_cpu_device::op_add , &lc8670_cpu_device::op_add , &lc8670_cpu_device::op_bn, // 0x8* |
| 131 | &lc8670_cpu_device::op_bnz , &lc8670_cpu_device::op_addc, &lc8670_cpu_device::op_addc, &lc8670_cpu_device::op_addc, &lc8670_cpu_device::op_bn, // 0x9* |
| 132 | &lc8670_cpu_device::op_ret , &lc8670_cpu_device::op_sub , &lc8670_cpu_device::op_sub , &lc8670_cpu_device::op_sub , &lc8670_cpu_device::op_not1, // 0xa* |
| 133 | &lc8670_cpu_device::op_reti , &lc8670_cpu_device::op_subc, &lc8670_cpu_device::op_subc, &lc8670_cpu_device::op_subc, &lc8670_cpu_device::op_not1, // 0xb* |
| 134 | &lc8670_cpu_device::op_ror , &lc8670_cpu_device::op_ldc , &lc8670_cpu_device::op_xch , &lc8670_cpu_device::op_xch , &lc8670_cpu_device::op_clr1, // 0xc* |
| 135 | &lc8670_cpu_device::op_rorc , &lc8670_cpu_device::op_or , &lc8670_cpu_device::op_or , &lc8670_cpu_device::op_or , &lc8670_cpu_device::op_clr1, // 0xd* |
| 136 | &lc8670_cpu_device::op_rol , &lc8670_cpu_device::op_and , &lc8670_cpu_device::op_and , &lc8670_cpu_device::op_and , &lc8670_cpu_device::op_set1, // 0xe* |
| 137 | &lc8670_cpu_device::op_rolc , &lc8670_cpu_device::op_xor , &lc8670_cpu_device::op_xor , &lc8670_cpu_device::op_xor , &lc8670_cpu_device::op_set1, // 0xf* |
| 138 | }; |
| 139 | |
| 140 | |
| 141 | //************************************************************************** |
| 142 | // IRQ vectors |
| 143 | //************************************************************************** |
| 144 | |
| 145 | const UINT16 lc8670_cpu_device::s_irq_vectors[] = |
| 146 | { |
| 147 | 0x0000, 0x0003, 0x000b, 0x0013, 0x001b, 0x0023, 0x002b, 0x0033, |
| 148 | 0x003b, 0x0043, 0x004b, 0x004f, 0x0052, 0x0055, 0x005a, 0x005d |
| 149 | }; |
| 150 | |
| 151 | |
| 152 | //************************************************************************** |
| 153 | // Internal memory map |
| 154 | //************************************************************************** |
| 155 | |
| 156 | static ADDRESS_MAP_START( lc8670_internal_map, AS_DATA, 8, lc8670_cpu_device ) |
| 157 | AM_RANGE(0x000, 0x0ff) AM_DEVREADWRITE(DEVICE_SELF, lc8670_cpu_device, mram_r, mram_w) |
| 158 | AM_RANGE(0x100, 0x17f) AM_DEVREADWRITE(DEVICE_SELF, lc8670_cpu_device, regs_r, regs_w) |
| 159 | AM_RANGE(0x180, 0x1ff) AM_DEVREADWRITE(DEVICE_SELF, lc8670_cpu_device, xram_r, xram_w) |
| 160 | ADDRESS_MAP_END |
| 161 | |
| 162 | |
| 163 | //************************************************************************** |
| 164 | // LC8670 DEVICE |
| 165 | //************************************************************************** |
| 166 | |
| 167 | //------------------------------------------------- |
| 168 | // lc8670_cpu_device - constructor |
| 169 | //------------------------------------------------- |
| 170 | |
| 171 | lc8670_cpu_device::lc8670_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) |
| 172 | : cpu_device(mconfig, LC8670, "Sanyo LC8670", tag, owner, clock), |
| 173 | m_program_config("program", ENDIANNESS_BIG, 8, 16, 0), |
| 174 | m_data_config("data", ENDIANNESS_BIG, 8, 9, 0, ADDRESS_MAP_NAME(lc8670_internal_map)), |
| 175 | m_io_config("io", ENDIANNESS_BIG, 8, 8, 0), |
| 176 | m_bankswitch_func(*this) |
| 177 | { |
| 178 | } |
| 179 | |
| 180 | //------------------------------------------------- |
| 181 | // device_start - start up the device |
| 182 | //------------------------------------------------- |
| 183 | |
| 184 | void lc8670_cpu_device::device_start() |
| 185 | { |
| 186 | // find address spaces |
| 187 | m_program = &space(AS_PROGRAM); |
| 188 | m_data = &space(AS_DATA); |
| 189 | m_io = &space(AS_IO); |
| 190 | m_direct = &m_program->direct(); |
| 191 | |
| 192 | // set our instruction counter |
| 193 | m_icountptr = &m_icount; |
| 194 | |
| 195 | // resolve callbacks |
| 196 | m_bankswitch_func.resolve(); |
| 197 | |
| 198 | // setup timers |
| 199 | m_basetimer = timer_alloc(BASE_TIMER); |
| 200 | m_basetimer->adjust(attotime::from_hz(m_clocks[LC8670_SUB_CLOCK]), 0, attotime::from_hz(m_clocks[LC8670_SUB_CLOCK])); |
| 201 | m_clocktimer = timer_alloc(CLOCK_TIMER); |
| 202 | |
| 203 | // alloc internal RAM |
| 204 | m_sfr = auto_alloc_array(machine(), UINT8, 0x80); |
| 205 | m_mram = auto_alloc_array(machine(), UINT8, 0x200); |
| 206 | m_xram = auto_alloc_array(machine(), UINT8, 0xc6); |
| 207 | m_vtrbf = auto_alloc_array(machine(), UINT8, 0x200); |
| 208 | |
| 209 | // register state for debugger |
| 210 | state_add(LC8670_PC , "PC" , m_pc).callimport().callexport().formatstr("%04X"); |
| 211 | state_add(LC8670_SFR + 0x00, "A" , REG_A ).callimport().callexport().formatstr("%02X"); |
| 212 | state_add(LC8670_SFR + 0x02, "B" , REG_B ).callimport().callexport().formatstr("%02X"); |
| 213 | state_add(LC8670_SFR + 0x03, "C" , REG_C ).callimport().callexport().formatstr("%02X"); |
| 214 | state_add(LC8670_SFR + 0x06, "SP" , REG_SP ).callimport().callexport().formatstr("%02X"); |
| 215 | state_add(LC8670_SFR + 0x01, "PSW" , REG_PSW ).callimport().callexport().formatstr("%02X"); |
| 216 | state_add(LC8670_SFR + 0x04, "TRL" , REG_TRL ).callimport().callexport().formatstr("%02X"); |
| 217 | state_add(LC8670_SFR + 0x05, "TRH" , REG_TRH ).callimport().callexport().formatstr("%02X"); |
| 218 | state_add(LC8670_SFR + 0x07, "PCON" , REG_PCON ).callimport().callexport().formatstr("%02X"); |
| 219 | state_add(LC8670_SFR + 0x08, "IE" , REG_IE ).callimport().callexport().formatstr("%02X"); |
| 220 | state_add(LC8670_SFR + 0x09, "IP" , REG_IP ).callimport().callexport().formatstr("%02X"); |
| 221 | state_add(LC8670_SFR + 0x0d, "EXT" , REG_EXT ).callimport().callexport().formatstr("%02X"); |
| 222 | state_add(LC8670_SFR + 0x0e, "OCR" , REG_OCR ).callimport().callexport().formatstr("%02X"); |
| 223 | state_add(LC8670_SFR + 0x10, "T0CNT" , REG_T0CNT ).callimport().callexport().formatstr("%02X"); |
| 224 | state_add(LC8670_SFR + 0x11, "T0PRR" , REG_T0PRR ).callimport().callexport().formatstr("%02X"); |
| 225 | state_add(LC8670_SFR + 0x12, "T0L" , m_timer0[0]).callimport().callexport().formatstr("%02X"); |
| 226 | state_add(LC8670_SFR + 0x13, "T0LR" , REG_T0LR ).callimport().callexport().formatstr("%02X"); |
| 227 | state_add(LC8670_SFR + 0x14, "T0H" , m_timer0[1]).callimport().callexport().formatstr("%02X"); |
| 228 | state_add(LC8670_SFR + 0x15, "T0HR" , REG_T0HR ).callimport().callexport().formatstr("%02X"); |
| 229 | state_add(LC8670_SFR + 0x18, "T1CNT" , REG_T1CNT ).callimport().callexport().formatstr("%02X"); |
| 230 | state_add(LC8670_SFR + 0x80, "T1L" , m_timer1[0]).callimport().callexport().formatstr("%02X"); |
| 231 | state_add(LC8670_SFR + 0x1a, "T1LC" , REG_T1LC ).callimport().callexport().formatstr("%02X"); |
| 232 | state_add(LC8670_SFR + 0x1b, "T1LR" , REG_T1LR ).callimport().callexport().formatstr("%02X"); |
| 233 | state_add(LC8670_SFR + 0x81, "T1H" , m_timer1[1]).callimport().callexport().formatstr("%02X"); |
| 234 | state_add(LC8670_SFR + 0x1c, "T1HC" , REG_T1HC ).callimport().callexport().formatstr("%02X"); |
| 235 | state_add(LC8670_SFR + 0x1d, "T1HR" , REG_T1HR ).callimport().callexport().formatstr("%02X"); |
| 236 | state_add(LC8670_SFR + 0x20, "MCR" , REG_MCR ).callimport().callexport().formatstr("%02X"); |
| 237 | state_add(LC8670_SFR + 0x22, "STAD" , REG_STAD ).callimport().callexport().formatstr("%02X"); |
| 238 | state_add(LC8670_SFR + 0x23, "CNR" , REG_CNR ).callimport().callexport().formatstr("%02X"); |
| 239 | state_add(LC8670_SFR + 0x24, "TDR" , REG_TDR ).callimport().callexport().formatstr("%02X"); |
| 240 | state_add(LC8670_SFR + 0x25, "XBNK" , REG_XBNK ).callimport().callexport().formatstr("%02X"); |
| 241 | state_add(LC8670_SFR + 0x27, "VCCR" , REG_VCCR ).callimport().callexport().formatstr("%02X"); |
| 242 | state_add(LC8670_SFR + 0x30, "SCON0" , REG_SCON0 ).callimport().callexport().formatstr("%02X"); |
| 243 | state_add(LC8670_SFR + 0x31, "SBUF0" , REG_SBUF0 ).callimport().callexport().formatstr("%02X"); |
| 244 | state_add(LC8670_SFR + 0x32, "SBR" , REG_SBR ).callimport().callexport().formatstr("%02X"); |
| 245 | state_add(LC8670_SFR + 0x34, "SCON1" , REG_SCON1 ).callimport().callexport().formatstr("%02X"); |
| 246 | state_add(LC8670_SFR + 0x35, "SBUF1" , REG_SBUF1 ).callimport().callexport().formatstr("%02X"); |
| 247 | state_add(LC8670_SFR + 0x44, "P1" , REG_P1 ).callimport().callexport().formatstr("%02X"); |
| 248 | state_add(LC8670_SFR + 0x45, "P1DDR" , REG_P1DDR ).callimport().callexport().formatstr("%02X"); |
| 249 | state_add(LC8670_SFR + 0x46, "P1FCR" , REG_P1FCR ).callimport().callexport().formatstr("%02X"); |
| 250 | state_add(LC8670_SFR + 0x4c, "P3" , REG_P3 ).callimport().callexport().formatstr("%02X"); |
| 251 | state_add(LC8670_SFR + 0x4d, "P3DDR" , REG_P3DDR ).callimport().callexport().formatstr("%02X"); |
| 252 | state_add(LC8670_SFR + 0x4e, "P3INT" , REG_P3INT ).callimport().callexport().formatstr("%02X"); |
| 253 | state_add(LC8670_SFR + 0x54, "FPR" , REG_FPR ).callimport().callexport().formatstr("%02X"); |
| 254 | state_add(LC8670_SFR + 0x5d, "I01CR" , REG_I01CR ).callimport().callexport().formatstr("%02X"); |
| 255 | state_add(LC8670_SFR + 0x5e, "I23CR" , REG_I23CR ).callimport().callexport().formatstr("%02X"); |
| 256 | state_add(LC8670_SFR + 0x5f, "ISL" , REG_ISL ).callimport().callexport().formatstr("%02X"); |
| 257 | state_add(LC8670_SFR + 0x63, "VSEL" , REG_VSEL ).callimport().callexport().formatstr("%02X"); |
| 258 | state_add(LC8670_SFR + 0x64, "VRMAD1", REG_VRMAD1).callimport().callexport().formatstr("%02X"); |
| 259 | state_add(LC8670_SFR + 0x65, "VRMAD2", REG_VRMAD2).callimport().callexport().formatstr("%02X"); |
| 260 | state_add(LC8670_SFR + 0x7f, "BTCR" , REG_BTCR ).callimport().callexport().formatstr("%02X"); |
| 261 | |
| 262 | state_add(STATE_GENPC, "curpc", m_pc).callimport().callexport().formatstr("%04X").noshow(); |
| 263 | state_add(STATE_GENPCBASE, "curpcbase", m_ppc).callimport().callexport().formatstr("%4X").noshow(); |
| 264 | state_add(STATE_GENFLAGS, "GENFLAGS", REG_PSW).mask(0xff).formatstr("%7s").noshow(); |
| 265 | |
| 266 | // save state |
| 267 | save_pointer(NAME(m_sfr), 0x80); |
| 268 | save_pointer(NAME(m_mram), 0x200); |
| 269 | save_pointer(NAME(m_xram), 0xc6); |
| 270 | save_pointer(NAME(m_vtrbf), 0x200); |
| 271 | save_item(NAME(m_pc)); |
| 272 | save_item(NAME(m_ppc)); |
| 273 | save_item(NAME(m_op)); |
| 274 | save_item(NAME(m_irq_flag)); |
| 275 | save_item(NAME(m_irq_lev)); |
| 276 | save_item(NAME(m_after_reti)); |
| 277 | save_item(NAME(m_p1_data)); |
| 278 | save_item(NAME(m_timer0_prescaler)); |
| 279 | save_item(NAME(m_timer0)); |
| 280 | save_item(NAME(m_timer1)); |
| 281 | save_item(NAME(m_timer1_comparator)); |
| 282 | save_item(NAME(m_base_timer)); |
| 283 | save_item(NAME(m_clock_changed)); |
| 284 | save_item(NAME(m_input_lines)); |
| 285 | } |
| 286 | |
| 287 | |
| 288 | //------------------------------------------------- |
| 289 | // device_reset - reset up the device |
| 290 | //------------------------------------------------- |
| 291 | |
| 292 | void lc8670_cpu_device::device_reset() |
| 293 | { |
| 294 | m_pc = s_irq_vectors[0]; |
| 295 | m_ppc = m_pc; |
| 296 | m_op = 0; |
| 297 | m_icount = 0; |
| 298 | m_irq_flag = 0; |
| 299 | m_irq_lev = 0; |
| 300 | m_after_reti = false; |
| 301 | m_p1_data = 0; |
| 302 | m_timer0_prescaler = 0; |
| 303 | m_timer0[0] = m_timer0[1] = 0; |
| 304 | m_timer1[0] = m_timer1[1] = 0; |
| 305 | m_timer1_comparator[0] = m_timer1_comparator[1] = 0; |
| 306 | m_base_timer[0] = m_base_timer[1] = 0; |
| 307 | m_clock_changed = false; |
| 308 | memset(m_sfr, 0, 0x80); |
| 309 | memset(m_mram, 0, 0x200); |
| 310 | memset(m_xram, 0, 0xc6); |
| 311 | memset(m_vtrbf, 0, 0x200); |
| 312 | |
| 313 | // default values from VMU hardware manual |
| 314 | REG_P1FCR = 0xbf; |
| 315 | REG_P3INT = 0xfd; |
| 316 | REG_ISL = 0xc0; |
| 317 | REG_VSEL = 0xfc; |
| 318 | REG_BTCR = 0x41; |
| 319 | |
| 320 | // reset bankswitch and clock source |
| 321 | m_bankswitch_func(0); |
| 322 | change_clock_source(); |
| 323 | } |
| 324 | |
| 325 | |
| 326 | //------------------------------------------------- |
| 327 | // device_timer - handler timer events |
| 328 | //------------------------------------------------- |
| 329 | |
| 330 | void lc8670_cpu_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) |
| 331 | { |
| 332 | switch(id) |
| 333 | { |
| 334 | case BASE_TIMER: |
| 335 | if (!(REG_ISL & 0x10)) |
| 336 | base_timer_tick(); |
| 337 | break; |
| 338 | |
| 339 | case CLOCK_TIMER: |
| 340 | timer0_prescaler_tick(); |
| 341 | timer1_tick(); |
| 342 | |
| 343 | if ((REG_ISL & 0x30) == 0x10) |
| 344 | base_timer_tick(); |
| 345 | break; |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | |
| 350 | //------------------------------------------------- |
| 351 | // state_import - import state into the device, |
| 352 | // after it has been set |
| 353 | //------------------------------------------------- |
| 354 | |
| 355 | void lc8670_cpu_device::state_import(const device_state_entry &entry) |
| 356 | { |
| 357 | switch (entry.index()) |
| 358 | { |
| 359 | case STATE_GENPC: |
| 360 | set_pc(m_pc); |
| 361 | break; |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | |
| 366 | //------------------------------------------------- |
| 367 | // state_string_export - export state as a string |
| 368 | // for the debugger |
| 369 | //------------------------------------------------- |
| 370 | |
| 371 | void lc8670_cpu_device::state_string_export(const device_state_entry &entry, astring &string) |
| 372 | { |
| 373 | switch (entry.index()) |
| 374 | { |
| 375 | case STATE_GENFLAGS: |
| 376 | string.printf("%s%s%s%s", |
| 377 | GET_CY ? "CY" : "..", |
| 378 | GET_AC ? "AC" : "..", |
| 379 | GET_OV ? "OV" : "..", |
| 380 | GET_P ? "P" : "." |
| 381 | ); |
| 382 | break; |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | |
| 387 | //------------------------------------------------- |
| 388 | // memory_space_config - return the configuration |
| 389 | // of the specified address space, or NULL if |
| 390 | // the space doesn't exist |
| 391 | //------------------------------------------------- |
| 392 | |
| 393 | const address_space_config * lc8670_cpu_device::memory_space_config(address_spacenum spacenum) const |
| 394 | { |
| 395 | return (spacenum == AS_PROGRAM) ? &m_program_config : |
| 396 | (spacenum == AS_DATA) ? &m_data_config : |
| 397 | (spacenum == AS_IO) ? &m_io_config : |
| 398 | NULL; |
| 399 | } |
| 400 | |
| 401 | //------------------------------------------------- |
| 402 | // execute - execute for the provided number of |
| 403 | // countcles |
| 404 | //------------------------------------------------- |
| 405 | |
| 406 | void lc8670_cpu_device::execute_run() |
| 407 | { |
| 408 | if (m_clock_changed) |
| 409 | { |
| 410 | change_clock_source(); |
| 411 | return; |
| 412 | } |
| 413 | |
| 414 | do |
| 415 | { |
| 416 | check_irqs(); |
| 417 | |
| 418 | debugger_instruction_hook(this, m_pc); |
| 419 | |
| 420 | int cycles = 0; |
| 421 | m_ppc = m_pc; |
| 422 | |
| 423 | if (REG_PCON & HALT_MODE) |
| 424 | { |
| 425 | // in HALT state the timers are still updated |
| 426 | cycles = 1; |
| 427 | } |
| 428 | else |
| 429 | { |
| 430 | // instruction fetch |
| 431 | m_op = fetch(); |
| 432 | int op_idx = decode_op(m_op); |
| 433 | |
| 434 | // execute the instruction |
| 435 | cycles = (this->*s_opcode_table[op_idx])(); |
| 436 | } |
| 437 | |
| 438 | // update the instruction counter |
| 439 | m_icount -= cycles; |
| 440 | } |
| 441 | while (m_icount > 0 && !m_clock_changed); |
| 442 | } |
| 443 | |
| 444 | |
| 445 | //------------------------------------------------- |
| 446 | // execute_set_input |
| 447 | //------------------------------------------------- |
| 448 | |
| 449 | void lc8670_cpu_device::execute_set_input(int inputnum, int state) |
| 450 | { |
| 451 | switch(inputnum) |
| 452 | { |
| 453 | case LC8670_EXT_INT0: |
| 454 | if ((REG_I01CR & 0x0c) == 0x00 && m_input_lines[inputnum] && !state) // falling edge |
| 455 | { |
| 456 | REG_I01CR |= 0x02; |
| 457 | if (REG_I01CR & 0x01) |
| 458 | set_irq_flag(1); |
| 459 | } |
| 460 | else if ((REG_I01CR & 0x0c) == 0x04 && !state) // low level |
| 461 | { |
| 462 | REG_I01CR |= 0x02; |
| 463 | if (REG_I01CR & 0x01) |
| 464 | set_irq_flag(1); |
| 465 | } |
| 466 | else if ((REG_I01CR & 0x0c) == 0x08 && !m_input_lines[inputnum] && state) // rising edge |
| 467 | { |
| 468 | REG_I01CR |= 0x02; |
| 469 | if (REG_I01CR & 0x01) |
| 470 | set_irq_flag(1); |
| 471 | } |
| 472 | else if ((REG_I01CR & 0x0c) == 0x0c && state) // high level |
| 473 | { |
| 474 | REG_I01CR |= 0x02; |
| 475 | if (REG_I01CR & 0x01) |
| 476 | set_irq_flag(1); |
| 477 | } |
| 478 | break; |
| 479 | case LC8670_EXT_INT1: |
| 480 | if ((REG_I01CR & 0xc0) == 0x00 && m_input_lines[inputnum] && !state) // falling edge |
| 481 | { |
| 482 | REG_I01CR |= 0x20; |
| 483 | if (REG_I01CR & 0x10) |
| 484 | set_irq_flag(2); |
| 485 | } |
| 486 | else if ((REG_I01CR & 0xc0) == 0x40 && !state) // low level |
| 487 | { |
| 488 | REG_I01CR |= 0x20; |
| 489 | if (REG_I01CR & 0x10) |
| 490 | set_irq_flag(2); |
| 491 | } |
| 492 | else if ((REG_I01CR & 0xc0) == 0x80 && !m_input_lines[inputnum] && state) // rising edge |
| 493 | { |
| 494 | REG_I01CR |= 0x20; |
| 495 | if (REG_I01CR & 0x10) |
| 496 | set_irq_flag(2); |
| 497 | } |
| 498 | else if ((REG_I01CR & 0xc0) == 0xc0 && state) // high level |
| 499 | { |
| 500 | REG_I01CR |= 0x20; |
| 501 | if (REG_I01CR & 0x10) |
| 502 | set_irq_flag(2); |
| 503 | } |
| 504 | break; |
| 505 | case LC8670_EXT_INT2: |
| 506 | if ((REG_I23CR & 0x04) && m_input_lines[inputnum] && !state) // falling edge |
| 507 | { |
| 508 | if (!(REG_ISL & 0x01)) |
| 509 | timer0_tick(true); |
| 510 | |
| 511 | REG_I23CR |= 0x02; |
| 512 | if (REG_I23CR & 0x01) |
| 513 | set_irq_flag(3); |
| 514 | } |
| 515 | if ((REG_I23CR & 0x08) && !m_input_lines[inputnum] && state) // rising edge |
| 516 | { |
| 517 | if (!(REG_ISL & 0x01)) |
| 518 | timer0_tick(true); |
| 519 | |
| 520 | REG_I23CR |= 0x02; |
| 521 | if (REG_I23CR & 0x01) |
| 522 | set_irq_flag(3); |
| 523 | } |
| 524 | break; |
| 525 | case LC8670_EXT_INT3: |
| 526 | if ((REG_I23CR & 0x40) && m_input_lines[inputnum] && !state) // falling edge |
| 527 | { |
| 528 | if (REG_ISL & 0x01) |
| 529 | timer0_tick(true); |
| 530 | |
| 531 | REG_I23CR |= 0x20; |
| 532 | if (REG_I23CR & 0x10) |
| 533 | set_irq_flag(4); |
| 534 | } |
| 535 | if ((REG_I23CR & 0x80) && !m_input_lines[inputnum] && state) // rising edge |
| 536 | { |
| 537 | if (REG_ISL & 0x01) |
| 538 | timer0_tick(true); |
| 539 | |
| 540 | REG_I23CR |= 0x20; |
| 541 | if (REG_I23CR & 0x10) |
| 542 | set_irq_flag(4); |
| 543 | } |
| 544 | break; |
| 545 | } |
| 546 | |
| 547 | m_input_lines[inputnum] = state; |
| 548 | } |
| 549 | |
| 550 | |
| 551 | //------------------------------------------------- |
| 552 | // screen_update - handle updating the screen |
| 553 | //------------------------------------------------- |
| 554 | |
| 555 | UINT32 lc8670_cpu_device::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) |
| 556 | { |
| 557 | if (m_lcd_update_func) |
| 558 | return m_lcd_update_func(*this, bitmap, cliprect, m_xram, (REG_MCR & 0x08) && (REG_VCCR & 0x80), REG_STAD); |
| 559 | |
| 560 | return 0; |
| 561 | } |
| 562 | |
| 563 | |
| 564 | //------------------------------------------------- |
| 565 | // check_irqs - check for interrupts request |
| 566 | //------------------------------------------------- |
| 567 | |
| 568 | void lc8670_cpu_device::check_irqs() |
| 569 | { |
| 570 | // update P3 interrupt |
| 571 | check_p3int(); |
| 572 | |
| 573 | if (m_irq_flag && !m_after_reti) |
| 574 | { |
| 575 | int irq = 0; |
| 576 | UINT8 priority = 0; |
| 577 | |
| 578 | // highest priority IRQ |
| 579 | if (!(REG_IE & 0x01) && (m_irq_flag & 0x02)) |
| 580 | { |
| 581 | irq = 0x01; |
| 582 | priority = 2; |
| 583 | } |
| 584 | else if (!(REG_IE & 0x02) && (m_irq_flag & 0x04)) |
| 585 | { |
| 586 | irq = 0x02; |
| 587 | priority = 2; |
| 588 | } |
| 589 | |
| 590 | // high priority IRQ |
| 591 | else if ((REG_IE & 0x80) && ((REG_IP<<3) & m_irq_flag)) |
| 592 | { |
| 593 | for(int i=3; i<=10; i++) |
| 594 | if ((m_irq_flag & (REG_IP<<3)) & (1<<i)) |
| 595 | { |
| 596 | irq = i; |
| 597 | priority = 1; |
| 598 | break; |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | // low priority IRQ |
| 603 | else if ((REG_IE & 0x80) && (m_irq_flag & 0x02)) |
| 604 | { |
| 605 | irq = 0x01; |
| 606 | priority = 0; |
| 607 | } |
| 608 | else if ((REG_IE & 0x80) && (m_irq_flag & 0x04)) |
| 609 | { |
| 610 | irq = 0x02; |
| 611 | priority = 0; |
| 612 | } |
| 613 | else if (REG_IE & 0x80) |
| 614 | { |
| 615 | for(int i=3; i<=10; i++) |
| 616 | if (m_irq_flag & (1<<i)) |
| 617 | { |
| 618 | irq = i; |
| 619 | priority = 0; |
| 620 | break; |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | // IRQ with less priority of current interrupt are not executed until the end of the current interrupt routine |
| 625 | if (irq != 0 && ((m_irq_lev & (1<<priority)) || (priority == 0 && (m_irq_lev & 0x06)) || (priority == 1 && (m_irq_lev & 0x04)))) |
| 626 | { |
| 627 | if (LOG_IRQ) logerror("%s: interrupt %d (Priority=%d, Level=%d) delayed\n", tag(), irq, priority, m_irq_lev); |
| 628 | irq = 0; |
| 629 | } |
| 630 | |
| 631 | if (irq != 0) |
| 632 | { |
| 633 | if (LOG_IRQ) logerror("%s: interrupt %d (Priority=%d, Level=%d) executed\n", tag(), irq, priority, m_irq_lev); |
| 634 | |
| 635 | m_irq_lev |= (1<<priority); |
| 636 | |
| 637 | push((m_pc>>0) & 0xff); |
| 638 | push((m_pc>>8) & 0xff); |
| 639 | |
| 640 | set_pc(s_irq_vectors[irq]); |
| 641 | |
| 642 | REG_PCON &= ~HALT_MODE; // interrupts resume from HALT state |
| 643 | |
| 644 | // clear the IRQ flag |
| 645 | m_irq_flag &= ~(1<<irq); |
| 646 | |
| 647 | standard_irq_callback(irq); |
| 648 | } |
| 649 | } |
| 650 | |
| 651 | // at least one opcode need to be executed after a RETI before another IRQ can be accepted |
| 652 | m_after_reti = false; |
| 653 | } |
| 654 | |
| 655 | |
| 656 | //------------------------------------------------- |
| 657 | // base_timer_tick - update base timer |
| 658 | //------------------------------------------------- |
| 659 | |
| 660 | void lc8670_cpu_device::base_timer_tick() |
| 661 | { |
| 662 | if (REG_BTCR & 0x40) |
| 663 | { |
| 664 | UINT16 base_counter_l = m_base_timer[0] + 1; |
| 665 | UINT16 base_counter_h = m_base_timer[1]; |
| 666 | |
| 667 | if (REG_BTCR & 0x80) // 6-bit mode |
| 668 | base_counter_h++; |
| 669 | else if (base_counter_l & 0x100) |
| 670 | base_counter_h++; |
| 671 | |
| 672 | if (base_counter_h & 0x40) |
| 673 | { |
| 674 | if (LOG_TIMERS) logerror("%s: base timer 0 overflow, IRQ: %d\n", tag(), BIT(REG_BTCR,0)); |
| 675 | REG_BTCR |= 0x02; |
| 676 | if (REG_BTCR & 0x01) |
| 677 | set_irq_flag(4); |
| 678 | } |
| 679 | |
| 680 | bool bt1_req = false; |
| 681 | switch(REG_BTCR & 0x30) |
| 682 | { |
| 683 | case 0x00: |
| 684 | if (base_counter_l & 0x20) |
| 685 | bt1_req = true; |
| 686 | break; |
| 687 | case 0x10: |
| 688 | if (base_counter_l & 0x80) |
| 689 | bt1_req = true; |
| 690 | break; |
| 691 | case 0x20: |
| 692 | if (base_counter_h & 0x01) |
| 693 | bt1_req = true; |
| 694 | break; |
| 695 | case 0x30: |
| 696 | if (base_counter_h & 0x04) |
| 697 | bt1_req = true; |
| 698 | break; |
| 699 | } |
| 700 | |
| 701 | if (bt1_req) |
| 702 | { |
| 703 | if (LOG_TIMERS) logerror("%s: base timer 1 overflow, IRQ: %d\n", tag(), BIT(REG_BTCR,3)); |
| 704 | REG_BTCR |= 0x08; |
| 705 | if (REG_BTCR & 0x04) |
| 706 | set_irq_flag(4); |
| 707 | } |
| 708 | |
| 709 | if (((base_counter_l & 0x04) && (REG_ISL & 0x08)) || ((base_counter_l & 0x08) && !(REG_ISL & 0x08))) |
| 710 | update_port1(m_p1_data | 0x40); |
| 711 | else |
| 712 | update_port1(m_p1_data & 0xbf); |
| 713 | |
| 714 | m_base_timer[0] = base_counter_l & 0xff; |
| 715 | m_base_timer[1] = base_counter_h & 0x3f; |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | //------------------------------------------------- |
| 720 | // update_to_prescaler - update timer 0 prescaler |
| 721 | //------------------------------------------------- |
| 722 | |
| 723 | void lc8670_cpu_device::timer0_prescaler_tick() |
| 724 | { |
| 725 | UINT16 prescaler = m_timer0_prescaler + 1; |
| 726 | if (prescaler & 0x100) |
| 727 | { |
| 728 | if (LOG_TIMERS) logerror("%s: timer0 prescaler overflow\n", tag()); |
| 729 | |
| 730 | if ((REG_ISL & 0x30) == 0x30) |
| 731 | base_timer_tick(); |
| 732 | |
| 733 | timer0_tick(); |
| 734 | |
| 735 | m_timer0_prescaler = REG_T0PRR; |
| 736 | } |
| 737 | else |
| 738 | { |
| 739 | m_timer0_prescaler = prescaler & 0xff; |
| 740 | } |
| 741 | } |
| 742 | |
| 743 | //------------------------------------------------- |
| 744 | // timer0_tick - update timer 0 |
| 745 | //------------------------------------------------- |
| 746 | |
| 747 | void lc8670_cpu_device::timer0_tick(bool ext_line) |
| 748 | { |
| 749 | if (REG_T0CNT & 0xc0) |
| 750 | { |
| 751 | if (REG_T0CNT & 0x20) |
| 752 | { |
| 753 | // 16-bit timer/counter mode |
| 754 | if ((REG_T0CNT & 0xc0) == 0xc0 && (((REG_T0CNT & 0x10) && ext_line) || (!(REG_T0CNT & 0x10) && !ext_line))) |
| 755 | { |
| 756 | UINT32 timer0 = ((m_timer0[1] << 8) | m_timer0[0]) + 1; |
| 757 | |
| 758 | if (timer0 & 0x10000) |
| 759 | { |
| 760 | if (LOG_TIMERS) logerror("%s: timer0 long overflow, IRQ: %d\n", tag(), BIT(REG_T0CNT,3)); |
| 761 | m_timer0[0] = REG_T0LR; |
| 762 | m_timer0[1] = REG_T0HR; |
| 763 | REG_T0CNT |= 0x0a; |
| 764 | if (REG_T0CNT & 0x04) |
| 765 | set_irq_flag(5); |
| 766 | } |
| 767 | else |
| 768 | { |
| 769 | m_timer0[0] = (timer0>>0) & 0xff; |
| 770 | m_timer0[1] = (timer0>>8) & 0xff; |
| 771 | } |
| 772 | } |
| 773 | } |
| 774 | else |
| 775 | { |
| 776 | // 8-bit timer/counter mode |
| 777 | if ((REG_T0CNT & 0x40) && (((REG_T0CNT & 0x10) && ext_line) || (!(REG_T0CNT & 0x10) && !ext_line))) |
| 778 | { |
| 779 | UINT16 timer0l = m_timer0[0] + 1; |
| 780 | |
| 781 | if (timer0l & 0x100) |
| 782 | { |
| 783 | if (LOG_TIMERS) logerror("%s: timer0 low overflow, IRQ: %d\n", tag(), BIT(REG_T0CNT,0)); |
| 784 | m_timer0[0] = REG_T0LR; |
| 785 | REG_T0CNT |= 0x02; |
| 786 | if (REG_T0CNT & 0x01) |
| 787 | set_irq_flag(3); |
| 788 | } |
| 789 | else |
| 790 | { |
| 791 | m_timer0[0] = timer0l & 0xff; |
| 792 | } |
| 793 | } |
| 794 | if ((REG_T0CNT & 0x80) && !ext_line) |
| 795 | { |
| 796 | UINT16 timer0h = m_timer0[1] + 1; |
| 797 | if (timer0h & 0x100) |
| 798 | { |
| 799 | if (LOG_TIMERS) logerror("%s: timer0 high overflow, IRQ: %d\n", tag(), BIT(REG_T0CNT,3)); |
| 800 | m_timer0[1] = REG_T0HR; |
| 801 | REG_T0CNT |= 0x08; |
| 802 | if (REG_T0CNT & 0x04) |
| 803 | set_irq_flag(5); |
| 804 | } |
| 805 | else |
| 806 | { |
| 807 | m_timer0[1] = timer0h & 0xff; |
| 808 | } |
| 809 | } |
| 810 | } |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | //------------------------------------------------- |
| 815 | // timer1_tick - update timer 1 |
| 816 | //------------------------------------------------- |
| 817 | |
| 818 | void lc8670_cpu_device::timer1_tick() |
| 819 | { |
| 820 | if (REG_T1CNT & 0xc0) |
| 821 | { |
| 822 | if (REG_T1CNT & 0x20) |
| 823 | { |
| 824 | if (REG_T1CNT & 0x40) |
| 825 | { |
| 826 | // 16-bit timer mode |
| 827 | UINT16 timer1l = m_timer1[0] + (REG_T1CNT & 0x80 ? 1 : 2); |
| 828 | if (timer1l & 0x100) |
| 829 | { |
| 830 | UINT16 timer1h = m_timer1[1] + 1; |
| 831 | m_timer1[0] = REG_T1LR; |
| 832 | REG_T1CNT |= 0x04; |
| 833 | |
| 834 | if (timer1h & 0x100) |
| 835 | { |
| 836 | if (LOG_TIMERS) logerror("%s: timer1 long overflow, IRQ: %d\n", tag(), BIT(REG_T1CNT,3)); |
| 837 | m_timer1[1] = REG_T1HR; |
| 838 | REG_T1CNT |= 0x08; |
| 839 | if (REG_T1CNT & 0x05) |
| 840 | set_irq_flag(6); |
| 841 | } |
| 842 | else |
| 843 | { |
| 844 | m_timer1[1] = timer1h & 0xff; |
| 845 | } |
| 846 | } |
| 847 | else |
| 848 | { |
| 849 | m_timer1[0] = timer1l & 0xff; |
| 850 | } |
| 851 | } |
| 852 | } |
| 853 | else |
| 854 | { |
| 855 | // 8-bit timer/pulse generator mode |
| 856 | if (REG_T1CNT & 0x40) |
| 857 | { |
| 858 | UINT16 timer1l = m_timer1[0] + 1; |
| 859 | |
| 860 | if (timer1l == m_timer1_comparator[0]) |
| 861 | update_port1(m_p1_data | 0x80); |
| 862 | |
| 863 | if (timer1l & 0x100) |
| 864 | { |
| 865 | if (LOG_TIMERS) logerror("%s: timer1 low overflow, IRQ: %d\n", tag(), BIT(REG_T1CNT,0)); |
| 866 | m_timer1[0] = REG_T1LR; |
| 867 | update_port1(m_p1_data & 0x7f); |
| 868 | REG_T1CNT |= 0x02; |
| 869 | if (REG_T1CNT & 0x01) |
| 870 | set_irq_flag(6); |
| 871 | } |
| 872 | else |
| 873 | { |
| 874 | m_timer1[0] = timer1l & 0xff; |
| 875 | } |
| 876 | } |
| 877 | if (REG_T1CNT & 0x80) |
| 878 | { |
| 879 | UINT16 timer1h = m_timer1[1] + 1; |
| 880 | |
| 881 | if (timer1h & 0x100) |
| 882 | { |
| 883 | if (LOG_TIMERS) logerror("%s: timer1 high overflow, IRQ: %d\n", tag(), BIT(REG_T1CNT,3)); |
| 884 | m_timer1[1] = REG_T1HR; |
| 885 | REG_T1CNT |= 0x08; |
| 886 | if (REG_T1CNT & 0x04) |
| 887 | set_irq_flag(6); |
| 888 | } |
| 889 | else |
| 890 | { |
| 891 | m_timer1[1] = timer1h & 0xff; |
| 892 | } |
| 893 | } |
| 894 | } |
| 895 | } |
| 896 | } |
| 897 | |
| 898 | |
| 899 | //************************************************************************** |
| 900 | // internal map handlers |
| 901 | //************************************************************************** |
| 902 | |
| 903 | READ8_MEMBER(lc8670_cpu_device::mram_r) |
| 904 | { |
| 905 | return m_mram[BIT(REG_PSW,1)*0x100 + offset]; |
| 906 | } |
| 907 | |
| 908 | WRITE8_MEMBER(lc8670_cpu_device::mram_w) |
| 909 | { |
| 910 | m_mram[BIT(REG_PSW,1)*0x100 + offset] = data; |
| 911 | } |
| 912 | |
| 913 | READ8_MEMBER(lc8670_cpu_device::xram_r) |
| 914 | { |
| 915 | if (!(REG_VCCR & 0x40) || space.debugger_access()) // XRAM access enabled |
| 916 | { |
| 917 | UINT8 * xram_bank = m_xram + (REG_XBNK & 0x03) * 0x60; |
| 918 | |
| 919 | switch(REG_XBNK & 0x03) |
| 920 | { |
| 921 | case 0: |
| 922 | case 1: |
| 923 | if ((offset & 0x0f) < 0x0c) |
| 924 | return xram_bank[(offset>>4) * 0x0c + (offset & 0x0f)]; |
| 925 | break; |
| 926 | case 2: |
| 927 | if (offset < 0x06) |
| 928 | return xram_bank[offset]; |
| 929 | break; |
| 930 | } |
| 931 | } |
| 932 | |
| 933 | return 0xff; |
| 934 | } |
| 935 | |
| 936 | WRITE8_MEMBER(lc8670_cpu_device::xram_w) |
| 937 | { |
| 938 | if (!(REG_VCCR & 0x40) || space.debugger_access()) // XRAM access enabled |
| 939 | { |
| 940 | UINT8 * xram_bank = m_xram + (REG_XBNK & 0x03) * 0x60; |
| 941 | |
| 942 | switch(REG_XBNK & 0x03) |
| 943 | { |
| 944 | case 0: |
| 945 | case 1: |
| 946 | if ((offset & 0x0f) < 0x0c) |
| 947 | xram_bank[(offset>>4) * 0x0c + (offset & 0x0f)] = data; |
| 948 | break; |
| 949 | case 2: |
| 950 | if (offset < 0x06) |
| 951 | xram_bank[offset] = data; |
| 952 | break; |
| 953 | } |
| 954 | } |
| 955 | } |
| 956 | |
| 957 | READ8_MEMBER(lc8670_cpu_device::regs_r) |
| 958 | { |
| 959 | switch(offset) |
| 960 | { |
| 961 | case 0x12: |
| 962 | return m_timer0[0]; |
| 963 | case 0x14: |
| 964 | return m_timer0[1]; |
| 965 | case 0x1b: |
| 966 | return m_timer1[0]; |
| 967 | case 0x1d: |
| 968 | return m_timer1[1]; |
| 969 | case 0x44: |
| 970 | return (REG_P1 & REG_P1DDR) | (m_io->read_byte(LC8670_PORT1) & (REG_P1DDR ^ 0xff)); |
| 971 | case 0x4c: |
| 972 | return (REG_P3 & REG_P3DDR) | (m_io->read_byte(LC8670_PORT3) & (REG_P3DDR ^ 0xff)); |
| 973 | case 0x5c: |
| 974 | return m_io->read_byte(LC8670_PORT7) | 0xf0; // 4-bit read-only port |
| 975 | case 0x66: |
| 976 | { |
| 977 | UINT8 data = m_vtrbf[((REG_VRMAD2<<8) | REG_VRMAD1) & 0x1ff]; |
| 978 | if (!space.debugger_access() && (REG_VSEL & 0x10)) |
| 979 | { |
| 980 | UINT16 vrmad = (REG_VRMAD1 | (REG_VRMAD2<<8)) + 1; |
| 981 | REG_VRMAD1 = vrmad & 0xff; |
| 982 | REG_VRMAD2 = (vrmad >> 8) & 0x01; |
| 983 | } |
| 984 | return data; |
| 985 | } |
| 986 | |
| 987 | // write-only registers |
| 988 | case 0x20: case 0x23: case 0x24: case 0x27: |
| 989 | case 0x45: case 0x46: case 0x4d: |
| 990 | if(!space.debugger_access()) logerror("%s: read write-only SFR %04x\n", machine().describe_context(), offset); |
| 991 | return 0xff; |
| 992 | } |
| 993 | return m_sfr[offset]; |
| 994 | } |
| 995 | |
| 996 | WRITE8_MEMBER(lc8670_cpu_device::regs_w) |
| 997 | { |
| 998 | switch(offset) |
| 999 | { |
| 1000 | case 0x00: |
| 1001 | REG_A = data; |
| 1002 | CHECK_P(); |
| 1003 | break; |
| 1004 | case 0x07: |
| 1005 | if (data & HOLD_MODE) |
| 1006 | fatalerror("%s: unemulated HOLD mode\n", machine().describe_context()); |
| 1007 | break; |
| 1008 | case 0x10: |
| 1009 | if (!(data & 0x80)) |
| 1010 | m_timer0[1] = REG_T0HR; |
| 1011 | if (!(data & 0x40)) |
| 1012 | m_timer0[0] = REG_T0LR; |
| 1013 | break; |
| 1014 | case 0x18: |
| 1015 | if ((data & 0x10) && !(REG_T1CNT & 0x10)) |
| 1016 | { |
| 1017 | m_timer1_comparator[0] = REG_T1LC; |
| 1018 | m_timer1_comparator[1] = REG_T1HC; |
| 1019 | } |
| 1020 | if (!(data & 0x80)) |
| 1021 | m_timer1[1] = REG_T1HR; |
| 1022 | if (!(data & 0x40)) |
| 1023 | m_timer1[0] = REG_T1LR; |
| 1024 | break; |
| 1025 | case 0x1a: |
| 1026 | if ((REG_T1CNT & 0x10) || !(REG_T1CNT & 0x40)) |
| 1027 | m_timer1_comparator[0] = data; |
| 1028 | break; |
| 1029 | case 0x1c: |
| 1030 | if ((REG_T1CNT & 0x10) || !(REG_T1CNT & 0x80)) |
| 1031 | m_timer1_comparator[1] = data; |
| 1032 | break; |
| 1033 | case 0x0e: |
| 1034 | if ((data ^ REG_OCR) & 0xb0) |
| 1035 | m_clock_changed = true; |
| 1036 | break; |
| 1037 | case 0x44: |
| 1038 | m_io->write_byte(LC8670_PORT1, ((data | (m_p1_data & REG_P1FCR)) & REG_P1DDR) | (m_io->read_byte(LC8670_PORT1) & (REG_P1DDR ^ 0xff))); |
| 1039 | break; |
| 1040 | case 0x4c: |
| 1041 | m_io->write_byte(LC8670_PORT3, (data & REG_P3DDR) | (m_io->read_byte(LC8670_PORT3) & (REG_P3DDR ^ 0xff))); |
| 1042 | break; |
| 1043 | case 0x66: |
| 1044 | m_vtrbf[((REG_VRMAD2<<8) | REG_VRMAD1) & 0x1ff] = data; |
| 1045 | if (!space.debugger_access() && (REG_VSEL & 0x10)) |
| 1046 | { |
| 1047 | UINT16 vrmad = (REG_VRMAD1 | (REG_VRMAD2<<8)) + 1; |
| 1048 | REG_VRMAD1 = vrmad & 0xff; |
| 1049 | REG_VRMAD2 = (vrmad >> 8) & 0x01; |
| 1050 | } |
| 1051 | break; |
| 1052 | case 0x7f: |
| 1053 | if (!(data & 0x40)) |
| 1054 | m_base_timer[0] = m_base_timer[1] = 0; // stop the timer clear the counter |
| 1055 | break; |
| 1056 | |
| 1057 | // read-only registers |
| 1058 | case 0x12: case 0x14: case 0x5c: |
| 1059 | if(!space.debugger_access()) logerror("%s: write read-only SFR %04x = %02x\n", machine().describe_context(), offset, data); |
| 1060 | return; |
| 1061 | } |
| 1062 | |
| 1063 | m_sfr[offset] = data; |
| 1064 | } |
| 1065 | |
| 1066 | |
| 1067 | //************************************************************************** |
| 1068 | // HELPERS |
| 1069 | //************************************************************************** |
| 1070 | |
| 1071 | inline UINT8 lc8670_cpu_device::fetch() |
| 1072 | { |
| 1073 | UINT8 data = m_direct->read_decrypted_byte(m_pc); |
| 1074 | |
| 1075 | set_pc(m_pc + 1); |
| 1076 | |
| 1077 | return data; |
| 1078 | } |
| 1079 | |
| 1080 | inline UINT8 lc8670_cpu_device::read_data(UINT16 offset) |
| 1081 | { |
| 1082 | return m_data->read_byte(offset); |
| 1083 | } |
| 1084 | |
| 1085 | inline void lc8670_cpu_device::write_data(UINT16 offset, UINT8 data) |
| 1086 | { |
| 1087 | m_data->write_byte(offset, data); |
| 1088 | } |
| 1089 | |
| 1090 | inline UINT8 lc8670_cpu_device::read_data_latch(UINT16 offset) |
| 1091 | { |
| 1092 | if (offset == 0x144) |
| 1093 | return REG_P1; |
| 1094 | else if (offset == 0x14c) |
| 1095 | return REG_P3; |
| 1096 | else |
| 1097 | return read_data(offset); |
| 1098 | } |
| 1099 | |
| 1100 | inline void lc8670_cpu_device::write_data_latch(UINT16 offset, UINT8 data) |
| 1101 | { |
| 1102 | if (offset == 0x144) |
| 1103 | REG_P1 = data; |
| 1104 | else if (offset == 0x14c) |
| 1105 | REG_P3 = data; |
| 1106 | else |
| 1107 | write_data(offset, data); |
| 1108 | } |
| 1109 | |
| 1110 | inline void lc8670_cpu_device::update_port1(UINT8 data) |
| 1111 | { |
| 1112 | m_p1_data = data; |
| 1113 | m_io->write_byte(LC8670_PORT1, ((REG_P1 | (m_p1_data & REG_P1FCR)) & REG_P1DDR) | (m_io->read_byte(LC8670_PORT1) & (REG_P1DDR ^ 0xff))); |
| 1114 | } |
| 1115 | |
| 1116 | inline void lc8670_cpu_device::set_pc(UINT16 new_pc) |
| 1117 | { |
| 1118 | m_pc = new_pc; |
| 1119 | } |
| 1120 | |
| 1121 | inline void lc8670_cpu_device::push(UINT8 data) |
| 1122 | { |
| 1123 | REG_SP++; |
| 1124 | m_mram[REG_SP] = data; |
| 1125 | } |
| 1126 | |
| 1127 | inline UINT8 lc8670_cpu_device::pop() |
| 1128 | { |
| 1129 | UINT8 data = m_mram[REG_SP]; |
| 1130 | REG_SP--; |
| 1131 | return data; |
| 1132 | } |
| 1133 | |
| 1134 | inline UINT16 lc8670_cpu_device::get_addr() |
| 1135 | { |
| 1136 | int mode = m_op & 0x0f; |
| 1137 | UINT16 addr = 0; |
| 1138 | |
| 1139 | if (mode > 0x01 && mode <= 0x03) |
| 1140 | addr = GET_D9; |
| 1141 | else if (mode > 0x03 && mode <= 0x07) |
| 1142 | addr = read_data(GET_RI | ((REG_PSW>>1) & 0x0c)) | ((GET_RI & 0x02) ? 0x100 : 0x00); |
| 1143 | else |
| 1144 | fatalerror("%s: invalid get_addr in mode %x\n", machine().describe_context(), mode); |
| 1145 | |
| 1146 | return addr; |
| 1147 | } |
| 1148 | |
| 1149 | inline UINT8 lc8670_cpu_device::get_data() |
| 1150 | { |
| 1151 | int mode = m_op & 0x0f; |
| 1152 | UINT8 data = 0; |
| 1153 | |
| 1154 | if (mode == 0x01) |
| 1155 | data = GET_I8; |
| 1156 | else |
| 1157 | data = read_data(get_addr()); |
| 1158 | |
| 1159 | return data; |
| 1160 | } |
| 1161 | |
| 1162 | inline void lc8670_cpu_device::change_clock_source() |
| 1163 | { |
| 1164 | UINT32 new_clock = 0; |
| 1165 | |
| 1166 | switch(REG_OCR & 0x30) |
| 1167 | { |
| 1168 | case 0x00: |
| 1169 | new_clock = m_clocks[LC8670_RC_CLOCK]; |
| 1170 | break; |
| 1171 | case 0x20: |
| 1172 | new_clock = m_clocks[LC8670_SUB_CLOCK]; |
| 1173 | break; |
| 1174 | case 0x10: |
| 1175 | case 0x30: |
| 1176 | new_clock = m_clocks[LC8670_CF_CLOCK]; |
| 1177 | break; |
| 1178 | } |
| 1179 | |
| 1180 | set_unscaled_clock(new_clock); |
| 1181 | set_clock_scale(1.0 / (REG_OCR & 0x80 ? 6.0 : 12.0)); |
| 1182 | m_clocktimer->adjust(attotime::from_hz(clock()), 0, attotime::from_hz(clock())); |
| 1183 | m_clock_changed = false; |
| 1184 | } |
| 1185 | |
| 1186 | inline void lc8670_cpu_device::check_p_flag() |
| 1187 | { |
| 1188 | UINT8 p_plag = 0; |
| 1189 | for(int i=0; i<8; i++) |
| 1190 | p_plag ^= BIT(REG_A, i); |
| 1191 | |
| 1192 | if (p_plag) |
| 1193 | REG_PSW |= FLAG_P; |
| 1194 | else |
| 1195 | REG_PSW &= ~FLAG_P; |
| 1196 | } |
| 1197 | |
| 1198 | inline void lc8670_cpu_device::check_p3int() |
| 1199 | { |
| 1200 | if (REG_P3INT & 0x04) |
| 1201 | { |
| 1202 | if ((m_io->read_byte(LC8670_PORT3) ^ 0xff) & (REG_P3DDR ^ 0xff) & REG_P3) |
| 1203 | { |
| 1204 | REG_P3INT |= 0x02; |
| 1205 | if (REG_P3INT & 0x01) |
| 1206 | set_irq_flag(10); |
| 1207 | } |
| 1208 | } |
| 1209 | } |
| 1210 | |
| 1211 | inline void lc8670_cpu_device::set_irq_flag(int source) |
| 1212 | { |
| 1213 | if (LOG_IRQ) logerror("%s: set interrupt flag: %d\n", tag(), source); |
| 1214 | m_irq_flag |= 1<<source; |
| 1215 | } |
| 1216 | |
| 1217 | int lc8670_cpu_device::decode_op(UINT8 op) |
| 1218 | { |
| 1219 | int idx = 0; |
| 1220 | switch (op & 0x0f) |
| 1221 | { |
| 1222 | case 0: case 1: |
| 1223 | idx = op & 0x0f; |
| 1224 | break; |
| 1225 | case 2: case 3: |
| 1226 | idx = 2; |
| 1227 | break; |
| 1228 | case 4: case 5: case 6: case 7: |
| 1229 | idx = 3; |
| 1230 | break; |
| 1231 | default: |
| 1232 | idx = 4; |
| 1233 | break; |
| 1234 | } |
| 1235 | |
| 1236 | return ((op>>4) & 0x0f) * 5 + idx; |
| 1237 | } |
| 1238 | |
| 1239 | //************************************************************************** |
| 1240 | // Opcodes |
| 1241 | //************************************************************************** |
| 1242 | |
| 1243 | int lc8670_cpu_device::op_nop() |
| 1244 | { |
| 1245 | return 1; |
| 1246 | } |
| 1247 | |
| 1248 | int lc8670_cpu_device::op_br() |
| 1249 | { |
| 1250 | UINT8 r8 = GET_R8; |
| 1251 | set_pc(m_pc + SIGNED(r8)); |
| 1252 | |
| 1253 | return 2; |
| 1254 | } |
| 1255 | |
| 1256 | int lc8670_cpu_device::op_ld() |
| 1257 | { |
| 1258 | REG_A = get_data(); |
| 1259 | CHECK_P(); |
| 1260 | |
| 1261 | return 1; |
| 1262 | } |
| 1263 | |
| 1264 | int lc8670_cpu_device::op_call() |
| 1265 | { |
| 1266 | UINT16 new_pc = GET_A12; |
| 1267 | |
| 1268 | push((m_pc>>0) & 0xff); |
| 1269 | push((m_pc>>8) & 0xff); |
| 1270 | |
| 1271 | set_pc((m_pc & 0xf000) | new_pc); |
| 1272 | |
| 1273 | return 2; |
| 1274 | } |
| 1275 | |
| 1276 | |
| 1277 | int lc8670_cpu_device::op_callr() |
| 1278 | { |
| 1279 | UINT16 r16 = fetch(); |
| 1280 | r16 |= fetch()<<8; |
| 1281 | |
| 1282 | push((m_pc>>0) & 0xff); |
| 1283 | push((m_pc>>8) & 0xff); |
| 1284 | set_pc(m_pc - 1 + r16); |
| 1285 | |
| 1286 | return 4; |
| 1287 | } |
| 1288 | |
| 1289 | int lc8670_cpu_device::op_brf() |
| 1290 | { |
| 1291 | UINT16 r16 = fetch(); |
| 1292 | r16 |= fetch()<<8; |
| 1293 | set_pc(m_pc - 1 + r16); |
| 1294 | |
| 1295 | return 4; |
| 1296 | } |
| 1297 | |
| 1298 | int lc8670_cpu_device::op_st() |
| 1299 | { |
| 1300 | write_data(get_addr(), REG_A); |
| 1301 | |
| 1302 | return 1; |
| 1303 | } |
| 1304 | |
| 1305 | int lc8670_cpu_device::op_callf() |
| 1306 | { |
| 1307 | UINT16 a16 = fetch()<<8; |
| 1308 | a16 |= fetch(); |
| 1309 | |
| 1310 | push((m_pc>>0) & 0xff); |
| 1311 | push((m_pc>>8) & 0xff); |
| 1312 | set_pc(a16); |
| 1313 | |
| 1314 | return 2; |
| 1315 | } |
| 1316 | |
| 1317 | int lc8670_cpu_device::op_jmpf() |
| 1318 | { |
| 1319 | UINT16 a16 = fetch()<<8; |
| 1320 | a16 |= fetch(); |
| 1321 | set_pc(a16); |
| 1322 | |
| 1323 | m_bankswitch_func(((REG_EXT & 0x01) ? 1 : (REG_EXT & 0x08) ? 0 : 2)); |
| 1324 | |
| 1325 | return 2; |
| 1326 | } |
| 1327 | |
| 1328 | int lc8670_cpu_device::op_mov() |
| 1329 | { |
| 1330 | UINT16 addr = get_addr(); |
| 1331 | UINT8 i8 = GET_I8; |
| 1332 | write_data(addr, i8); |
| 1333 | |
| 1334 | return 1; |
| 1335 | } |
| 1336 | |
| 1337 | int lc8670_cpu_device::op_jmp() |
| 1338 | { |
| 1339 | UINT16 new_pc = GET_A12; |
| 1340 | set_pc((m_pc & 0xf000) | new_pc); |
| 1341 | |
| 1342 | return 2; |
| 1343 | } |
| 1344 | |
| 1345 | int lc8670_cpu_device::op_mul() |
| 1346 | { |
| 1347 | UINT32 res = REG_B * ((REG_A<<8) | REG_C); |
| 1348 | |
| 1349 | REG_A = (res>>8) & 0xff; |
| 1350 | REG_B = (res>>16) & 0xff; |
| 1351 | REG_C = (res>>0) & 0xff; |
| 1352 | |
| 1353 | SET_OV(REG_B != 0 ? 1 : 0); |
| 1354 | SET_CY(0); |
| 1355 | CHECK_P(); |
| 1356 | |
| 1357 | return 7; |
| 1358 | } |
| 1359 | |
| 1360 | int lc8670_cpu_device::op_be() |
| 1361 | { |
| 1362 | UINT8 data = get_data(); |
| 1363 | UINT8 r8 = GET_R8; |
| 1364 | |
| 1365 | if (REG_A == data) |
| 1366 | set_pc(m_pc + SIGNED(r8)); |
| 1367 | |
| 1368 | SET_CY((REG_A < data) ? 1 : 0); |
| 1369 | |
| 1370 | return 2; |
| 1371 | } |
| 1372 | |
| 1373 | int lc8670_cpu_device::op_be_ri() |
| 1374 | { |
| 1375 | UINT8 data = get_data(); |
| 1376 | UINT8 i8 = GET_I8; |
| 1377 | UINT8 r8 = GET_R8; |
| 1378 | |
| 1379 | if (i8 == data) |
| 1380 | set_pc(m_pc + SIGNED(r8)); |
| 1381 | |
| 1382 | SET_CY((data < i8) ? 1 : 0); |
| 1383 | |
| 1384 | return 2; |
| 1385 | } |
| 1386 | |
| 1387 | |
| 1388 | int lc8670_cpu_device::op_div() |
| 1389 | { |
| 1390 | UINT32 res, mod; |
| 1391 | |
| 1392 | if (REG_B != 0) |
| 1393 | { |
| 1394 | UINT16 v = ((REG_A<<8) | REG_C); |
| 1395 | res = v / REG_B; |
| 1396 | mod = v % REG_B; |
| 1397 | |
| 1398 | REG_A = (res>>8) & 0xff; |
| 1399 | REG_C = (res>>0) & 0xff; |
| 1400 | REG_B = mod & 0xff; |
| 1401 | SET_OV(0); |
| 1402 | } |
| 1403 | else |
| 1404 | { |
| 1405 | REG_A = 0xff; |
| 1406 | SET_OV(1); |
| 1407 | } |
| 1408 | |
| 1409 | SET_CY(0); |
| 1410 | CHECK_P(); |
| 1411 | |
| 1412 | return 7; |
| 1413 | } |
| 1414 | |
| 1415 | int lc8670_cpu_device::op_bne() |
| 1416 | { |
| 1417 | UINT8 data = get_data(); |
| 1418 | UINT8 r8 = GET_R8; |
| 1419 | |
| 1420 | if (REG_A != data) |
| 1421 | set_pc(m_pc + SIGNED(r8)); |
| 1422 | |
| 1423 | SET_CY((REG_A < data) ? 1 : 0); |
| 1424 | |
| 1425 | return 2; |
| 1426 | } |
| 1427 | |
| 1428 | int lc8670_cpu_device::op_bne_ri() |
| 1429 | { |
| 1430 | UINT8 data = get_data(); |
| 1431 | UINT8 i8 = GET_I8; |
| 1432 | UINT8 r8 = GET_R8; |
| 1433 | |
| 1434 | if (i8 != data) |
| 1435 | set_pc(m_pc + SIGNED(r8)); |
| 1436 | |
| 1437 | SET_CY((data < i8) ? 1 : 0); |
| 1438 | |
| 1439 | return 2; |
| 1440 | } |
| 1441 | |
| 1442 | int lc8670_cpu_device::op_ldf() |
| 1443 | { |
| 1444 | UINT16 addr = REG_TRL | (REG_TRH<<8); |
| 1445 | |
| 1446 | m_bankswitch_func(REG_FPR & 0x01 ? 2 : 1); |
| 1447 | REG_A = m_program->read_byte(addr); |
| 1448 | CHECK_P(); |
| 1449 | m_bankswitch_func(((REG_EXT & 0x01) ? 1 : (REG_EXT & 0x08) ? 0 : 2)); |
| 1450 | |
| 1451 | return 2; |
| 1452 | } |
| 1453 | |
| 1454 | int lc8670_cpu_device::op_stf() |
| 1455 | { |
| 1456 | UINT16 addr = REG_TRL | (REG_TRH<<8); |
| 1457 | |
| 1458 | m_bankswitch_func(REG_FPR & 0x01 ? 2 : 1); |
| 1459 | m_program->write_byte(addr, REG_A); |
| 1460 | m_bankswitch_func(((REG_EXT & 0x01) ? 1 : (REG_EXT & 0x08) ? 0 : 2)); |
| 1461 | |
| 1462 | return 2; |
| 1463 | } |
| 1464 | |
| 1465 | int lc8670_cpu_device::op_dbnz() |
| 1466 | { |
| 1467 | UINT16 addr = get_addr(); |
| 1468 | UINT8 r8 = GET_R8; |
| 1469 | UINT8 data = read_data_latch(addr) - 1; |
| 1470 | |
| 1471 | write_data_latch(addr, data); |
| 1472 | |
| 1473 | if (data != 0) |
| 1474 | set_pc(m_pc + SIGNED(r8)); |
| 1475 | |
| 1476 | return 2; |
| 1477 | } |
| 1478 | |
| 1479 | int lc8670_cpu_device::op_bpc() |
| 1480 | { |
| 1481 | UINT8 b3 = GET_B3; |
| 1482 | UINT16 d9 = GET_D9B3; |
| 1483 | UINT8 r8 = GET_R8; |
| 1484 | UINT8 data = read_data_latch(d9); |
| 1485 | |
| 1486 | if (data & (1<<b3)) |
| 1487 | { |
| 1488 | write_data_latch(d9, data & ~(1<<b3)); |
| 1489 | set_pc(m_pc + SIGNED(r8)); |
| 1490 | } |
| 1491 | |
| 1492 | return 2; |
| 1493 | } |
| 1494 | |
| 1495 | int lc8670_cpu_device::op_push() |
| 1496 | { |
| 1497 | UINT16 d9 = GET_D9; |
| 1498 | push(read_data(d9)); |
| 1499 | |
| 1500 | return 2; |
| 1501 | } |
| 1502 | |
| 1503 | int lc8670_cpu_device::op_inc() |
| 1504 | { |
| 1505 | UINT16 addr = get_addr(); |
| 1506 | UINT8 data = read_data_latch(addr); |
| 1507 | |
| 1508 | write_data_latch(addr, data + 1); |
| 1509 | |
| 1510 | return 1; |
| 1511 | } |
| 1512 | |
| 1513 | int lc8670_cpu_device::op_bp() |
| 1514 | { |
| 1515 | UINT8 b3 = GET_B3; |
| 1516 | UINT16 d9 = GET_D9B3; |
| 1517 | UINT8 r8 = GET_R8; |
| 1518 | |
| 1519 | if (read_data(d9) & (1<<b3)) |
| 1520 | set_pc(m_pc + SIGNED(r8)); |
| 1521 | |
| 1522 | return 2; |
| 1523 | } |
| 1524 | |
| 1525 | int lc8670_cpu_device::op_pop() |
| 1526 | { |
| 1527 | UINT16 d9 = GET_D9; |
| 1528 | write_data(d9, pop()); |
| 1529 | |
| 1530 | return 2; |
| 1531 | } |
| 1532 | |
| 1533 | int lc8670_cpu_device::op_dec() |
| 1534 | { |
| 1535 | UINT16 addr = get_addr(); |
| 1536 | UINT8 data = read_data_latch(addr); |
| 1537 | |
| 1538 | write_data_latch(addr, data - 1); |
| 1539 | |
| 1540 | return 1; |
| 1541 | } |
| 1542 | |
| 1543 | int lc8670_cpu_device::op_bz() |
| 1544 | { |
| 1545 | UINT8 r8 = GET_R8; |
| 1546 | |
| 1547 | if (REG_A == 0) |
| 1548 | set_pc(m_pc + SIGNED(r8)); |
| 1549 | |
| 1550 | return 2; |
| 1551 | } |
| 1552 | |
| 1553 | int lc8670_cpu_device::op_add() |
| 1554 | { |
| 1555 | UINT8 data = get_data(); |
| 1556 | INT32 res = (REG_A + data); |
| 1557 | |
| 1558 | SET_CY(res > 0xff ? 1 : 0); |
| 1559 | SET_AC(((REG_A & 0x0f) + (data & 0x0f)) > 0x0f ? 1 : 0); |
| 1560 | SET_OV((REG_A & data) & (data ^ res) & 0x80 ? 1 : 0); |
| 1561 | |
| 1562 | REG_A = res & 0xff; |
| 1563 | CHECK_P(); |
| 1564 | |
| 1565 | return 1; |
| 1566 | } |
| 1567 | |
| 1568 | int lc8670_cpu_device::op_bn() |
| 1569 | { |
| 1570 | UINT8 b3 = GET_B3; |
| 1571 | UINT16 d9 = GET_D9B3; |
| 1572 | UINT8 r8 = GET_R8; |
| 1573 | |
| 1574 | if (!(read_data(d9) & (1<<b3))) |
| 1575 | set_pc(m_pc + SIGNED(r8)); |
| 1576 | |
| 1577 | return 2; |
| 1578 | } |
| 1579 | |
| 1580 | int lc8670_cpu_device::op_bnz() |
| 1581 | { |
| 1582 | UINT8 r8 = GET_R8; |
| 1583 | |
| 1584 | if (REG_A != 0) |
| 1585 | set_pc(m_pc + SIGNED(r8)); |
| 1586 | |
| 1587 | return 2; |
| 1588 | } |
| 1589 | |
| 1590 | int lc8670_cpu_device::op_addc() |
| 1591 | { |
| 1592 | UINT8 data = get_data(); |
| 1593 | INT32 res = (REG_A + data + GET_CY); |
| 1594 | |
| 1595 | SET_CY(res > 0xff ? 1 : 0); |
| 1596 | SET_AC(((REG_A & 0x0f) + (data & 0x0f) + GET_CY) > 0x0f ? 1 : 0); |
| 1597 | SET_OV(((REG_A+GET_CY) & data) & (data ^ res) & 0x80 ? 1 : 0); |
| 1598 | |
| 1599 | REG_A = res & 0xff; |
| 1600 | CHECK_P(); |
| 1601 | |
| 1602 | return 1; |
| 1603 | } |
| 1604 | |
| 1605 | int lc8670_cpu_device::op_ret() |
| 1606 | { |
| 1607 | UINT16 new_pc = pop()<<8; |
| 1608 | new_pc |= pop(); |
| 1609 | set_pc(new_pc); |
| 1610 | |
| 1611 | return 2; |
| 1612 | } |
| 1613 | |
| 1614 | int lc8670_cpu_device::op_sub() |
| 1615 | { |
| 1616 | UINT8 data = get_data(); |
| 1617 | INT32 res = (REG_A - data); |
| 1618 | |
| 1619 | SET_CY(res < 0x00 ? 1 : 0); |
| 1620 | SET_AC(((REG_A & 0x0f) - (data & 0x0f)) < 0x00 ? 1 : 0); |
| 1621 | SET_OV((REG_A ^ data) & (data & res) & 0x80 ? 1 : 0); |
| 1622 | |
| 1623 | REG_A = res & 0xff; |
| 1624 | CHECK_P(); |
| 1625 | |
| 1626 | return 1; |
| 1627 | } |
| 1628 | |
| 1629 | int lc8670_cpu_device::op_not1() |
| 1630 | { |
| 1631 | UINT16 d9 = GET_D9B3; |
| 1632 | UINT8 data = read_data_latch(d9); |
| 1633 | |
| 1634 | data ^= (1<<GET_B3); |
| 1635 | write_data_latch(d9, data); |
| 1636 | |
| 1637 | return 1; |
| 1638 | } |
| 1639 | |
| 1640 | int lc8670_cpu_device::op_reti() |
| 1641 | { |
| 1642 | UINT16 new_pc = pop()<<8; |
| 1643 | new_pc |= pop(); |
| 1644 | set_pc(new_pc); |
| 1645 | |
| 1646 | if (LOG_IRQ) logerror("%s: RETI from level %d\n", machine().describe_context(), m_irq_lev); |
| 1647 | for(int i=2; i>=0; i--) |
| 1648 | if (m_irq_lev & (1<<i)) |
| 1649 | { |
| 1650 | m_irq_lev &= ~(1<<i); |
| 1651 | break; |
| 1652 | } |
| 1653 | |
| 1654 | m_after_reti = true; |
| 1655 | |
| 1656 | return 2; |
| 1657 | } |
| 1658 | |
| 1659 | int lc8670_cpu_device::op_subc() |
| 1660 | { |
| 1661 | UINT8 data = get_data(); |
| 1662 | INT32 res = (REG_A - data - GET_CY); |
| 1663 | |
| 1664 | SET_CY(res < 0x00 ? 1 : 0); |
| 1665 | SET_AC(((REG_A & 0x0f) - (data & 0x0f) - GET_CY) < 0x00 ? 1 : 0); |
| 1666 | SET_OV((REG_A ^ (data + GET_CY)) & (data & res) & 0x80 ? 1 : 0); |
| 1667 | |
| 1668 | REG_A = res & 0xff; |
| 1669 | CHECK_P(); |
| 1670 | |
| 1671 | return 1; |
| 1672 | } |
| 1673 | |
| 1674 | int lc8670_cpu_device::op_ror() |
| 1675 | { |
| 1676 | REG_A = ((REG_A & 0x01) << 7) | (REG_A>>1); |
| 1677 | CHECK_P(); |
| 1678 | |
| 1679 | return 1; |
| 1680 | } |
| 1681 | |
| 1682 | int lc8670_cpu_device::op_ldc() |
| 1683 | { |
| 1684 | REG_A = m_program->read_byte(((REG_TRH<<8) | REG_TRL) + REG_A); |
| 1685 | CHECK_P(); |
| 1686 | |
| 1687 | return 2; |
| 1688 | } |
| 1689 | |
| 1690 | int lc8670_cpu_device::op_xch() |
| 1691 | { |
| 1692 | UINT16 addr = get_addr(); |
| 1693 | UINT8 data = read_data(addr); |
| 1694 | |
| 1695 | write_data(addr, REG_A); |
| 1696 | REG_A = data; |
| 1697 | CHECK_P(); |
| 1698 | |
| 1699 | return 1; |
| 1700 | } |
| 1701 | |
| 1702 | int lc8670_cpu_device::op_clr1() |
| 1703 | { |
| 1704 | UINT16 d9 = GET_D9B3; |
| 1705 | UINT8 data = read_data_latch(d9); |
| 1706 | |
| 1707 | data &= ~(1<<GET_B3); |
| 1708 | write_data_latch(d9, data); |
| 1709 | |
| 1710 | return 1; |
| 1711 | } |
| 1712 | |
| 1713 | int lc8670_cpu_device::op_rorc() |
| 1714 | { |
| 1715 | UINT8 a = (REG_A>>1) | (GET_CY ? 0x80 : 0x00); |
| 1716 | |
| 1717 | SET_CY(BIT(REG_A,0)); |
| 1718 | REG_A = a; |
| 1719 | CHECK_P(); |
| 1720 | |
| 1721 | return 1; |
| 1722 | } |
| 1723 | |
| 1724 | int lc8670_cpu_device::op_or() |
| 1725 | { |
| 1726 | REG_A = REG_A | get_data(); |
| 1727 | CHECK_P(); |
| 1728 | |
| 1729 | return 1; |
| 1730 | } |
| 1731 | |
| 1732 | int lc8670_cpu_device::op_rol() |
| 1733 | { |
| 1734 | REG_A = ((REG_A & 0x80) >> 7) | (REG_A<<1); |
| 1735 | CHECK_P(); |
| 1736 | |
| 1737 | return 1; |
| 1738 | } |
| 1739 | |
| 1740 | int lc8670_cpu_device::op_and() |
| 1741 | { |
| 1742 | REG_A = REG_A & get_data(); |
| 1743 | CHECK_P(); |
| 1744 | |
| 1745 | return 1; |
| 1746 | } |
| 1747 | |
| 1748 | int lc8670_cpu_device::op_set1() |
| 1749 | { |
| 1750 | UINT16 d9 = GET_D9B3; |
| 1751 | UINT8 data = read_data_latch(d9); |
| 1752 | |
| 1753 | data |= (1<<GET_B3); |
| 1754 | write_data_latch(d9, data); |
| 1755 | |
| 1756 | return 1; |
| 1757 | } |
| 1758 | |
| 1759 | int lc8670_cpu_device::op_rolc() |
| 1760 | { |
| 1761 | UINT8 a = (REG_A<<1) | (GET_CY ? 0x01 : 0x00); |
| 1762 | |
| 1763 | SET_CY(BIT(REG_A,7)); |
| 1764 | REG_A = a; |
| 1765 | CHECK_P(); |
| 1766 | |
| 1767 | return 1; |
| 1768 | } |
| 1769 | |
| 1770 | int lc8670_cpu_device::op_xor() |
| 1771 | { |
| 1772 | REG_A = REG_A ^ get_data(); |
| 1773 | CHECK_P(); |
| 1774 | |
| 1775 | return 1; |
| 1776 | } |
trunk/src/emu/cpu/lc8670/lc8670dsm.c
| r0 | r19051 | |
| 1 | /****************************************************************************** |
| 2 | |
| 3 | Sanyo LC8670 disassembler |
| 4 | |
| 5 | ******************************************************************************/ |
| 6 | |
| 7 | #include "emu.h" |
| 8 | #include "debugger.h" |
| 9 | #include "lc8670.h" |
| 10 | |
| 11 | const lc8670_cpu_device::dasm_entry lc8670_cpu_device::s_dasm_table[] = |
| 12 | { |
| 13 | { "NOP" , OP_NULL, OP_NULL, 0 }, // 0x0* |
| 14 | { "BR" , OP_R8 , OP_NULL, 0 }, |
| 15 | { "LD" , OP_D9 , OP_NULL, 0 }, |
| 16 | { "LD" , OP_RI , OP_NULL, 0 }, |
| 17 | { "CALL", OP_A12 , OP_NULL, 0 }, |
| 18 | { "CALLR", OP_R16 , OP_NULL, 0 }, // 0x1* |
| 19 | { "BRF" , OP_R16 , OP_NULL, 0 }, |
| 20 | { "ST" , OP_D9 , OP_NULL, 0 }, |
| 21 | { "ST" , OP_RI , OP_NULL, 0 }, |
| 22 | { "CALL", OP_A12 , OP_NULL, 0 }, |
| 23 | { "CALLF", OP_A16 , OP_NULL, 0 }, // 0x2* |
| 24 | { "JMPF", OP_A16 , OP_NULL, 0 }, |
| 25 | { "MOV" , OP_D9 , OP_I8 , 1 }, |
| 26 | { "MOV" , OP_RI , OP_I8 , 1 }, |
| 27 | { "JMP" , OP_A12 , OP_NULL, 0 }, |
| 28 | { "MUL" , OP_NULL, OP_NULL, 0 }, // 0x3* |
| 29 | { "BE" , OP_I8 , OP_R8 , 0 }, |
| 30 | { "BE" , OP_D9 , OP_R8 , 0 }, |
| 31 | { "BE" , OP_RII8, OP_R8 , 0 }, |
| 32 | { "JMP" , OP_A12 , OP_NULL, 0 }, |
| 33 | { "DIV" , OP_NULL, OP_NULL, 0 }, // 0x4* |
| 34 | { "BNE" , OP_I8 , OP_R8 , 0 }, |
| 35 | { "BNE" , OP_D9 , OP_R8 , 0 }, |
| 36 | { "BNE" , OP_RII8, OP_R8 , 0 }, |
| 37 | { "BPC" , OP_D9B3, OP_R8 , 0 }, |
| 38 | { "LDF" , OP_NULL, OP_NULL, 0 }, // 0x5* |
| 39 | { "STF" , OP_NULL, OP_NULL, 0 }, |
| 40 | { "DBNZ", OP_D9 , OP_R8 , 0 }, |
| 41 | { "DBNZ", OP_RI , OP_R8RI, 0 }, |
| 42 | { "BPC" , OP_D9B3, OP_R8 , 0 }, |
| 43 | { "PUSH", OP_D9 , OP_NULL, 0 }, // 0x6* |
| 44 | { "PUSH", OP_D9 , OP_NULL, 0 }, |
| 45 | { "INC" , OP_D9 , OP_NULL, 0 }, |
| 46 | { "INC" , OP_RI , OP_NULL, 0 }, |
| 47 | { "BP" , OP_D9B3, OP_R8 , 0 }, |
| 48 | { "POP" , OP_D9 , OP_NULL, 0 }, // 0x7* |
| 49 | { "POP" , OP_D9 , OP_NULL, 0 }, |
| 50 | { "DEC" , OP_D9 , OP_NULL, 0 }, |
| 51 | { "DEC" , OP_RI , OP_NULL, 0 }, |
| 52 | { "BP" , OP_D9B3, OP_R8 , 0 }, |
| 53 | { "BZ" , OP_R8 , OP_NULL, 0 }, // 0x8* |
| 54 | { "ADD" , OP_I8 , OP_NULL, 0 }, |
| 55 | { "ADD" , OP_D9 , OP_NULL, 0 }, |
| 56 | { "ADD" , OP_RI , OP_NULL, 0 }, |
| 57 | { "BN" , OP_D9B3, OP_R8 , 0 }, |
| 58 | { "BNZ" , OP_R8 , OP_NULL, 0 }, // 0x9* |
| 59 | { "ADDC", OP_I8 , OP_NULL, 0 }, |
| 60 | { "ADDC", OP_D9 , OP_NULL, 0 }, |
| 61 | { "ADDC", OP_RI , OP_NULL, 0 }, |
| 62 | { "BN" , OP_D9B3, OP_R8 , 0 }, |
| 63 | { "RET" , OP_NULL, OP_NULL, 0 }, // 0xa* |
| 64 | { "SUB" , OP_I8 , OP_NULL, 0 }, |
| 65 | { "SUB" , OP_D9 , OP_NULL, 0 }, |
| 66 | { "SUB" , OP_RI , OP_NULL, 0 }, |
| 67 | { "NOT1", OP_D9B3, OP_NULL, 0 }, |
| 68 | { "RETI", OP_NULL, OP_NULL, 0 }, // 0xb* |
| 69 | { "SUBC", OP_I8 , OP_NULL, 0 }, |
| 70 | { "SUBC", OP_D9 , OP_NULL, 0 }, |
| 71 | { "SUBC", OP_RI , OP_NULL, 0 }, |
| 72 | { "NOT1", OP_D9B3, OP_NULL, 0 }, |
| 73 | { "ROR" , OP_NULL, OP_NULL, 0 }, // 0xc* |
| 74 | { "LDC" , OP_NULL, OP_NULL, 0 }, |
| 75 | { "XCH" , OP_D9 , OP_NULL, 0 }, |
| 76 | { "XCH" , OP_RI , OP_NULL, 0 }, |
| 77 | { "CLR1", OP_D9B3, OP_NULL, 0 }, |
| 78 | { "RORC", OP_NULL, OP_NULL, 0 }, // 0xd* |
| 79 | { "OR" , OP_I8 , OP_NULL, 0 }, |
| 80 | { "OR" , OP_D9 , OP_NULL, 0 }, |
| 81 | { "OR" , OP_RI , OP_NULL, 0 }, |
| 82 | { "CLR1", OP_D9B3, OP_NULL, 0 }, |
| 83 | { "ROL" , OP_NULL, OP_NULL, 0 }, // 0xe* |
| 84 | { "AND" , OP_I8 , OP_NULL, 0 }, |
| 85 | { "AND" , OP_D9 , OP_NULL, 0 }, |
| 86 | { "AND" , OP_RI , OP_NULL, 0 }, |
| 87 | { "SET1", OP_D9B3, OP_NULL, 0 }, |
| 88 | { "ROLC", OP_NULL, OP_NULL, 0 }, // 0xf* |
| 89 | { "XOR" , OP_I8 , OP_NULL, 0 }, |
| 90 | { "XOR" , OP_D9 , OP_NULL, 0 }, |
| 91 | { "XOR" , OP_RI , OP_NULL, 0 }, |
| 92 | { "SET1", OP_D9B3, OP_NULL, 0 }, |
| 93 | }; |
| 94 | |
| 95 | void lc8670_cpu_device::dasm_arg(UINT8 op, char *buffer, offs_t pc, int arg, const UINT8 *oprom, int &pos) |
| 96 | { |
| 97 | switch( arg ) |
| 98 | { |
| 99 | case OP_NULL: |
| 100 | buffer[0] = '\0'; |
| 101 | break; |
| 102 | case OP_R8: |
| 103 | pc++; |
| 104 | // fall through |
| 105 | case OP_R8RI: |
| 106 | buffer += sprintf(buffer, "%04x", (pc + 1 + oprom[pos] - (oprom[pos]&0x80 ? 0x100 : 0)) & 0xffff); |
| 107 | pos++; |
| 108 | break; |
| 109 | case OP_R16: |
| 110 | buffer += sprintf(buffer, "%04x", (pc + 2 + ((oprom[pos+1]<<8) | oprom[pos])) & 0xffff); |
| 111 | pos += 2; |
| 112 | break; |
| 113 | case OP_RI: |
| 114 | buffer += sprintf(buffer, "@%x", op & 0x03); |
| 115 | break; |
| 116 | case OP_A12: |
| 117 | buffer += sprintf(buffer, "%04x", ((pc + 2) & 0xf000) | ((op & 0x10)<<7) | ((op & 0x07)<<8) | oprom[pos]); |
| 118 | pos++; |
| 119 | break; |
| 120 | case OP_A16: |
| 121 | buffer += sprintf(buffer, "%04x", (oprom[pos]<<8) | oprom[pos+1]); |
| 122 | pos += 2; |
| 123 | break; |
| 124 | case OP_I8: |
| 125 | buffer += sprintf(buffer, "#$%02x", oprom[pos++]); |
| 126 | break; |
| 127 | case OP_B3: |
| 128 | buffer += sprintf(buffer, "%x", op & 0x07); |
| 129 | break; |
| 130 | case OP_D9: |
| 131 | buffer += sprintf(buffer, "($%03x)", ((op & 0x01)<<8) | oprom[pos]); |
| 132 | pos++; |
| 133 | break; |
| 134 | case OP_D9B3: |
| 135 | buffer += sprintf(buffer, "($%03x)", ((op & 0x10)<<4) | oprom[pos]); |
| 136 | buffer += sprintf(buffer, ",%x", op & 0x07); |
| 137 | pos++; |
| 138 | break; |
| 139 | case OP_RII8: |
| 140 | buffer += sprintf(buffer, "@%x", op & 0x03); |
| 141 | buffer += sprintf(buffer, ",#$%02x", oprom[pos]); |
| 142 | pos++; |
| 143 | break; |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | //------------------------------------------------- |
| 148 | // disasm_disassemble - call the disassembly |
| 149 | // helper function |
| 150 | //------------------------------------------------- |
| 151 | |
| 152 | offs_t lc8670_cpu_device::disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options) |
| 153 | { |
| 154 | int pos = 0; |
| 155 | char arg1[16], arg2[16]; |
| 156 | |
| 157 | UINT8 op = oprom[pos++]; |
| 158 | |
| 159 | int op_idx = decode_op(op); |
| 160 | const dasm_entry *inst = &s_dasm_table[op_idx]; |
| 161 | |
| 162 | buffer += sprintf(buffer,"%-8s", inst->str); |
| 163 | |
| 164 | dasm_arg(op, inst->inv ? arg2 : arg1, pc+0, inst->arg1, oprom, pos); |
| 165 | dasm_arg(op, inst->inv ? arg1 : arg2, pc+1, inst->arg2, oprom, pos); |
| 166 | |
| 167 | strcat(buffer, arg1); |
| 168 | |
| 169 | if (inst->arg2 != OP_NULL) |
| 170 | { |
| 171 | strcat(buffer, ","); |
| 172 | strcat(buffer, arg2); |
| 173 | } |
| 174 | |
| 175 | return pos; |
| 176 | } |