trunk/src/mess/drivers/excali64.c
| r242267 | r242268 | |
|---|
| 12 | 12 | |
| 13 | 13 | #include "emu.h" |
| 14 | 14 | #include "cpu/z80/z80.h" |
| 15 | #include "video/mc6845.h" |
| 15 | 16 | #include "machine/i8251.h" |
| 16 | 17 | #include "bus/rs232/rs232.h" |
| 17 | 18 | //#include "machine/clock.h" |
| r242267 | r242268 | |
|---|
| 28 | 29 | public: |
| 29 | 30 | excali64_state(const machine_config &mconfig, device_type type, const char *tag) |
| 30 | 31 | : driver_device(mconfig, type, tag) |
| 32 | , m_palette(*this, "palette") |
| 31 | 33 | , m_maincpu(*this, "maincpu") |
| 32 | 34 | , m_cass(*this, "cassette") |
| 33 | 35 | { } |
| 34 | 36 | |
| 37 | DECLARE_DRIVER_INIT(excali64); |
| 35 | 38 | DECLARE_READ8_MEMBER(ppic_r); |
| 36 | 39 | DECLARE_WRITE8_MEMBER(ppic_w); |
| 37 | 40 | DECLARE_READ8_MEMBER(port50_r); |
| 38 | 41 | DECLARE_WRITE8_MEMBER(port70_w); |
| 42 | DECLARE_WRITE8_MEMBER(video_w); |
| 43 | MC6845_UPDATE_ROW(update_row); |
| 44 | DECLARE_WRITE_LINE_MEMBER(crtc_de); |
| 45 | DECLARE_WRITE_LINE_MEMBER(crtc_vs); |
| 46 | |
| 47 | const UINT8 *m_p_chargen; |
| 48 | UINT8 *m_p_videoram; |
| 49 | required_device<palette_device> m_palette; |
| 39 | 50 | |
| 40 | 51 | private: |
| 41 | 52 | UINT8 m_sys_status; |
| 53 | bool m_crtc_vs; |
| 54 | bool m_crtc_de; |
| 42 | 55 | required_device<cpu_device> m_maincpu; |
| 43 | 56 | required_device<cassette_image_device> m_cass; |
| 44 | 57 | }; |
| 45 | 58 | |
| 46 | 59 | static ADDRESS_MAP_START(excali64_mem, AS_PROGRAM, 8, excali64_state) |
| 47 | | AM_RANGE(0x0000, 0x3FFF) AM_ROM |
| 60 | AM_RANGE(0x0000, 0x1FFF) AM_ROM |
| 61 | AM_RANGE(0x2000, 0x2FFF) AM_ROM AM_WRITE(video_w) |
| 62 | AM_RANGE(0x3000, 0x3FFF) AM_ROM |
| 48 | 63 | AM_RANGE(0x4000, 0xFFFF) AM_RAM |
| 49 | 64 | ADDRESS_MAP_END |
| 50 | 65 | |
| r242267 | r242268 | |
|---|
| 53 | 68 | AM_RANGE(0x10, 0x10) AM_MIRROR(0x0e) AM_DEVREADWRITE("uart",i8251_device, data_r, data_w) |
| 54 | 69 | AM_RANGE(0x11, 0x11) AM_MIRROR(0x0e) AM_DEVREADWRITE("uart", i8251_device, status_r, control_w) |
| 55 | 70 | AM_RANGE(0x20, 0x23) AM_MIRROR(0x0c) AM_DEVREADWRITE("pit", pit8253_device, read, write) |
| 71 | AM_RANGE(0x30, 0x30) AM_DEVREADWRITE("crtc", mc6845_device, status_r, address_w) |
| 72 | AM_RANGE(0x31, 0x31) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w) |
| 73 | AM_RANGE(0x50, 0x5f) AM_READ(port50_r) |
| 56 | 74 | AM_RANGE(0x60, 0x63) AM_MIRROR(0x0c) AM_DEVREADWRITE("ppi", i8255_device, read, write) |
| 75 | AM_RANGE(0x70, 0x7f) AM_WRITE(port70_w) |
| 57 | 76 | ADDRESS_MAP_END |
| 58 | 77 | |
| 59 | 78 | |
| r242267 | r242268 | |
|---|
| 78 | 97 | READ8_MEMBER( excali64_state::port50_r ) |
| 79 | 98 | { |
| 80 | 99 | UINT8 data = m_sys_status & 7; |
| 100 | data |= (UINT8)m_crtc_vs << 4; |
| 101 | data |= (UINT8)m_crtc_de << 5; |
| 81 | 102 | return data; |
| 82 | 103 | } |
| 83 | 104 | |
| r242267 | r242268 | |
|---|
| 95 | 116 | m_sys_status = data; |
| 96 | 117 | } |
| 97 | 118 | |
| 119 | WRITE8_MEMBER( excali64_state::video_w ) |
| 120 | { |
| 121 | m_p_videoram[offset] = data; |
| 122 | } |
| 123 | |
| 124 | WRITE_LINE_MEMBER( excali64_state::crtc_de ) |
| 125 | { |
| 126 | m_crtc_de = state; |
| 127 | } |
| 128 | |
| 129 | WRITE_LINE_MEMBER( excali64_state::crtc_vs ) |
| 130 | { |
| 131 | m_crtc_vs = state; |
| 132 | } |
| 133 | |
| 134 | DRIVER_INIT_MEMBER( excali64_state, excali64 ) |
| 135 | { |
| 136 | m_p_chargen = memregion("chargen")->base(); |
| 137 | m_p_videoram = memregion("videoram")->base(); |
| 138 | } |
| 139 | |
| 140 | MC6845_UPDATE_ROW( excali64_state::update_row ) |
| 141 | { |
| 142 | const rgb_t *palette = m_palette->palette()->entry_list_raw(); |
| 143 | UINT8 chr,gfx=0; |
| 144 | UINT16 mem,x; |
| 145 | UINT32 *p = &bitmap.pix32(y); |
| 146 | |
| 147 | for (x = 0; x < x_count; x++) |
| 148 | { |
| 149 | UINT8 inv=0; |
| 150 | if (x == cursor_x) inv=0xff; |
| 151 | mem = (ma + x) & 0xfff; |
| 152 | chr = m_p_videoram[mem]; |
| 153 | gfx = m_p_chargen[(chr<<4) | ra] ^ inv; |
| 154 | |
| 155 | /* Display a scanline of a character */ |
| 156 | *p++ = palette[BIT(gfx, 0)]; |
| 157 | *p++ = palette[BIT(gfx, 1)]; |
| 158 | *p++ = palette[BIT(gfx, 2)]; |
| 159 | *p++ = palette[BIT(gfx, 3)]; |
| 160 | *p++ = palette[BIT(gfx, 4)]; |
| 161 | *p++ = palette[BIT(gfx, 5)]; |
| 162 | *p++ = palette[BIT(gfx, 6)]; |
| 163 | *p++ = palette[BIT(gfx, 7)]; |
| 164 | } |
| 165 | } |
| 166 | |
| 98 | 167 | static MACHINE_CONFIG_START( excali64, excali64_state ) |
| 99 | 168 | /* basic machine hardware */ |
| 100 | 169 | MCFG_CPU_ADD("maincpu", Z80, XTAL_16MHz / 4) |
| r242267 | r242268 | |
|---|
| 130 | 199 | MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette") |
| 131 | 200 | MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) |
| 132 | 201 | |
| 202 | /* Video hardware */ |
| 203 | MCFG_SCREEN_ADD("screen", RASTER) |
| 204 | MCFG_SCREEN_REFRESH_RATE(50) |
| 205 | MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ |
| 206 | MCFG_SCREEN_SIZE(80*8, 25*10) |
| 207 | MCFG_SCREEN_VISIBLE_AREA(0, 80*8-1, 0, 25*10-1) |
| 208 | MCFG_SCREEN_UPDATE_DEVICE("crtc", mc6845_device, screen_update) |
| 209 | MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette") |
| 210 | MCFG_MC6845_ADD("crtc", MC6845, "screen", XTAL_16MHz / 16) // 1MHz for lowres; 2MHz for highres |
| 211 | MCFG_MC6845_SHOW_BORDER_AREA(false) |
| 212 | MCFG_MC6845_CHAR_WIDTH(8) |
| 213 | MCFG_MC6845_UPDATE_ROW_CB(excali64_state, update_row) |
| 214 | MCFG_MC6845_OUT_DE_CB(WRITELINE(excali64_state, crtc_de)) |
| 215 | MCFG_MC6845_OUT_VSYNC_CB(WRITELINE(excali64_state, crtc_vs)) |
| 216 | |
| 133 | 217 | /* Devices */ |
| 134 | 218 | MCFG_CASSETTE_ADD( "cassette" ) |
| 135 | 219 | MACHINE_CONFIG_END |
| r242267 | r242268 | |
|---|
| 148 | 232 | |
| 149 | 233 | /* Driver */ |
| 150 | 234 | |
| 151 | | /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ |
| 152 | | COMP( 1984, excali64, 0, 0, excali64, excali64, driver_device, 0, "BGR Computers", "Excalibur 64", GAME_IS_SKELETON ) |
| 235 | /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ |
| 236 | COMP( 1984, excali64, 0, 0, excali64, excali64, excali64_state, excali64, "BGR Computers", "Excalibur 64", GAME_IS_SKELETON ) |