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r33761 Tuesday 9th December, 2014 at 13:16:41 UTC by Robbbert
(MESS) excalibur : added keyboard, system is usable. Can save and load cassettes. (nw)
[src/mess/drivers]excali64.c

trunk/src/mess/drivers/excali64.c
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88
99Chips: Z80A, 8251, 8253, 8255, 6845
1010
11ToDo:
12- Some keys can be connected to more than one position in the matrix. Need to
13  determine the correct positions.
14- The position of the "Line Insert" key is unknown.
15- The video section has attributes and colour, none of this is done.
16- Disk controller
17- Banking
18- The schematic shows the audio counter connected to 2MHz, but this produces
19  sounds that are too high. Connected to 1MHz for now.
20- Serial
21- Parallel / Centronics
22- Need software
23
1124****************************************************************************/
1225
1326#include "emu.h"
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3245      , m_palette(*this, "palette")
3346      , m_maincpu(*this, "maincpu")
3447      , m_cass(*this, "cassette")
48      , m_io_keyboard(*this, "KEY")
3549   { }
3650
3751   DECLARE_DRIVER_INIT(excali64);
52   DECLARE_WRITE8_MEMBER(ppib_w);
3853   DECLARE_READ8_MEMBER(ppic_r);
3954   DECLARE_WRITE8_MEMBER(ppic_w);
55   DECLARE_READ8_MEMBER(port00_r);
4056   DECLARE_READ8_MEMBER(port50_r);
4157   DECLARE_WRITE8_MEMBER(port70_w);
4258   DECLARE_WRITE8_MEMBER(video_w);
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4460   DECLARE_WRITE_LINE_MEMBER(crtc_de);
4561   DECLARE_WRITE_LINE_MEMBER(crtc_vs);
4662
47   const UINT8 *m_p_chargen;
48   UINT8 *m_p_videoram;
4963   required_device<palette_device> m_palette;
5064   
5165private:
66   const UINT8 *m_p_chargen;
67   UINT8 *m_p_videoram;
5268   UINT8 m_sys_status;
69   UINT8 m_kbdrow;
5370   bool m_crtc_vs;
5471   bool m_crtc_de;
5572   required_device<cpu_device> m_maincpu;
5673   required_device<cassette_image_device> m_cass;
74   required_ioport_array<8> m_io_keyboard;
5775};
5876
5977static ADDRESS_MAP_START(excali64_mem, AS_PROGRAM, 8, excali64_state)
6078   AM_RANGE(0x0000, 0x1FFF) AM_ROM
61   AM_RANGE(0x2000, 0x2FFF) AM_ROM AM_WRITE(video_w)
62   AM_RANGE(0x3000, 0x3FFF) AM_ROM
79   AM_RANGE(0x2000, 0x3FFF) AM_ROM AM_WRITE(video_w)
6380   AM_RANGE(0x4000, 0xFFFF) AM_RAM
6481ADDRESS_MAP_END
6582
6683static ADDRESS_MAP_START(excali64_io, AS_IO, 8, excali64_state)
6784   ADDRESS_MAP_GLOBAL_MASK(0xff)
85   AM_RANGE(0x00, 0x0f) AM_READ(port00_r)
6886   AM_RANGE(0x10, 0x10) AM_MIRROR(0x0e) AM_DEVREADWRITE("uart",i8251_device, data_r, data_w)
6987   AM_RANGE(0x11, 0x11) AM_MIRROR(0x0e) AM_DEVREADWRITE("uart", i8251_device, status_r, control_w)
7088   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)
89   AM_RANGE(0x30, 0x30) AM_MIRROR(0x0e) AM_DEVREADWRITE("crtc", mc6845_device, status_r, address_w)
90   AM_RANGE(0x31, 0x31) AM_MIRROR(0x0e) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w)
7391   AM_RANGE(0x50, 0x5f) AM_READ(port50_r)
7492   AM_RANGE(0x60, 0x63) AM_MIRROR(0x0c) AM_DEVREADWRITE("ppi", i8255_device, read, write)
7593   AM_RANGE(0x70, 0x7f) AM_WRITE(port70_w)
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7896
7997/* Input ports */
8098static INPUT_PORTS_START( excali64 )
99   //PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("LINEFEED") PORT_CODE(KEYCODE_ENTER_PAD) PORT_CHAR(0x0a)//H
100   //PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("REPT") PORT_CODE(KEYCODE_LALT)//0x11
101   //PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("(Down)") PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN))//B
102   //PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("(Up)") PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP))
103   //PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("(Fire)") PORT_CODE(KEYCODE_INSERT) PORT_CHAR(UCHAR_MAMEKEY(INSERT))
104   //PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("\\ |")PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|') PORT_CHAR(0x1c)
105   //PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("(Right)") PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
106   //PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("BRK") PORT_CODE(KEYCODE_NUMLOCK) PORT_CHAR(0x03)
107   //PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("(Left)") PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT))
108
109   PORT_START("KEY.0")    /* line 0 */
110   PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("R") PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHAR('R') PORT_CHAR(0x12)
111   PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("W") PORT_CODE(KEYCODE_W) PORT_CHAR('W') PORT_CHAR('W') PORT_CHAR(0x17)
112   PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
113   PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHAR('E') PORT_CHAR(0x05)
114   PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("TAB") PORT_CODE(KEYCODE_TAB) PORT_CHAR(0x09)
115   PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("CAPSLOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE
116   PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('A') PORT_CHAR(0x01)
117   PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Q") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q') PORT_CHAR('Q') PORT_CHAR(0x11)
118
119   PORT_START("KEY.1")    /* line 1 */
120   PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F3") PORT_CODE(KEYCODE_F3)
121   PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F2") PORT_CODE(KEYCODE_F2)
122   PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F4") PORT_CODE(KEYCODE_F4)
123   PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
124   PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2)//=
125   PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) // space
126   PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F1") PORT_CODE(KEYCODE_F1)
127   PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) // F1
128
129   PORT_START("KEY.2")    /* line 2 */
130   PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(". >") PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
131   PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("M") PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHAR('M') PORT_CHAR(0x0d)
132   PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("/ ?") PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
133   PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(", <") PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
134   PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR('B') PORT_CHAR(0x02)
135   PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) //B
136   PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("N") PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR('N') PORT_CHAR(0x0e)
137   PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) //N
138
139   PORT_START("KEY.3")    /* line 3 */
140   PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("' \"") PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(0x27) PORT_CHAR(0x22) PORT_CHAR(0x27)
141   PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("L") PORT_CODE(KEYCODE_L) PORT_CHAR('L') PORT_CHAR('L') PORT_CHAR(0x0c)
142   PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(0x0d)
143   PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("; :") PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':')
144   PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("J") PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('J') PORT_CHAR(0x0a)
145   PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("G") PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('G') PORT_CHAR(0x07)
146   PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("K") PORT_CODE(KEYCODE_K) PORT_CHAR('K') PORT_CHAR('K') PORT_CHAR(0x0b)
147   PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("H") PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('H') PORT_CHAR(0x08)
148
149   PORT_START("KEY.4")    /* line 4 */
150   PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("4 $") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
151   PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("2 @") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@')
152   PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("5 %") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
153   PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("3 #") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
154   PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("DEL") PORT_CODE(KEYCODE_DEL) PORT_CHAR(0x7f) PORT_CHAR(0x7f) PORT_CHAR(0x1f)
155   PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ESC") PORT_CODE(KEYCODE_ESC) PORT_CHAR(0x1b)
156   PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("1 !") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
157   PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) //1
158
159   PORT_START("KEY.5")    /* line 5 */
160   PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("[ {") PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{') PORT_CHAR(0x1b)
161   PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("O") PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR('O') PORT_CHAR(0x0f)
162   PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("] }") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}') PORT_CHAR(0x1d)
163   PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("P") PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('P') PORT_CHAR(0x10)
164   PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("U") PORT_CODE(KEYCODE_U) PORT_CHAR('U') PORT_CHAR('U') PORT_CHAR(0x15)
165   PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("T") PORT_CODE(KEYCODE_T) PORT_CHAR('T') PORT_CHAR('T') PORT_CHAR(0x14)
166   PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("I") PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('I') PORT_CHAR(0x09)//0x12
167   PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Y") PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHAR('Y') PORT_CHAR(0x19)//0x14
168
169   PORT_START("KEY.6")    /* line 6 */
170   PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('F') PORT_CHAR(0x06)
171   PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("X") PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('X') PORT_CHAR(0x18)
172   PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("V") PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHAR('V') PORT_CHAR(0x16)
173   PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR('C') PORT_CHAR(0x03)
174   PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR('D') PORT_CHAR(0x04)
175   PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("S") PORT_CODE(KEYCODE_S) PORT_CHAR('S') PORT_CHAR('S') PORT_CHAR(0x13)
176   PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Z") PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHAR('Z') PORT_CHAR(0x1a)
177   PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) //Z
178
179   PORT_START("KEY.7")    /* line 7 */
180   PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("= +") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+') PORT_CHAR('=')
181   PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("0 )") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')')
182   PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Backspace") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(0x08)
183   PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("- _") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_')
184   PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8 *") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*')
185   PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("6 ^") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^')
186   PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("9 (") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(')
187   PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("7 &") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&')
81188INPUT_PORTS_END
82189
190WRITE8_MEMBER( excali64_state::ppib_w )
191{
192   m_kbdrow = data;
193}
194
83195READ8_MEMBER( excali64_state::ppic_r )
84196{
85197   UINT8 data = 0xf7;
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87199   return data;
88200}
89201
202READ8_MEMBER( excali64_state::port00_r )
203{
204   UINT8 data = 0xff;
205
206   for (int i = 0; i < 8; i++)
207   {
208      if (!BIT(m_kbdrow, i))
209         data &= m_io_keyboard[i]->read();
210   }
211
212   return data;
213}
214
90215/*
91216d0 : /rom ; screen
92217d1 : ram on
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140265MC6845_UPDATE_ROW( excali64_state::update_row )
141266{
142267   const rgb_t *palette = m_palette->palette()->entry_list_raw();
143   UINT8 chr,gfx=0;
268   UINT8 chr,gfx;
144269   UINT16 mem,x;
145270   UINT32 *p = &bitmap.pix32(y);
146271
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175300   //MCFG_I8251_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts))
176301
177302   MCFG_DEVICE_ADD("pit", PIT8253, 0)
178   MCFG_PIT8253_CLK0(XTAL_16MHz / 8) /* Timer 0: tone gen for speaker */
303   MCFG_PIT8253_CLK0(XTAL_16MHz / 16) /* Timer 0: tone gen for speaker */
179304   MCFG_PIT8253_OUT0_HANDLER(DEVWRITELINE("speaker", speaker_sound_device, level_w))
180305   MCFG_PIT8253_CLK1(XTAL_16MHz / 8) /* Timer 1: baud rate gen for 8251 */
181306   //MCFG_PIT8253_OUT1_HANDLER(WRITELINE(excali64_state, write_uart_clock))
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183308
184309   MCFG_DEVICE_ADD("ppi", I8255A, 0 )
185310   //MCFG_I8255_IN_PORTA_CB(READ8(excali64_state, ppia_r))
186   //MCFG_I8255_OUT_PORTA_CB(WRITE8(excali64_state, ppia_w))
311   //MCFG_I8255_OUT_PORTA_CB(WRITE8(excali64_state, ppia_w)) // parallel port
187312   //MCFG_I8255_IN_PORTB_CB(READ8(excali64_state, ppib_r))
188   //MCFG_I8255_OUT_PORTB_CB(WRITE8(excali64_state, ppib_w))
313   MCFG_I8255_OUT_PORTB_CB(WRITE8(excali64_state, ppib_w))
189314   MCFG_I8255_IN_PORTC_CB(READ8(excali64_state, ppic_r))
190315   MCFG_I8255_OUT_PORTC_CB(WRITE8(excali64_state, ppic_w))
191316
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224349   ROM_LOAD( "rom_1.bin", 0x0000, 0x4000, CRC(e129a305) SHA1(e43ec7d040c2b2e548d22fd6bbc7df8b45a26e5a) )
225350   ROM_LOAD( "rom_2.bin", 0x2000, 0x2000, CRC(916d9f5a) SHA1(91c527cce963481b7bebf077e955ca89578bb553) )
226351
227   ROM_REGION(0x1000, "videoram", ROMREGION_ERASE00)
352   ROM_REGION(0x2000, "videoram", ROMREGION_ERASE00)
228353
229354   ROM_REGION(0x1000, "chargen", 0)
230355   ROM_LOAD( "genex_3.bin", 0x0000, 0x1000, CRC(b91619a9) SHA1(2ced636cb7b94ba9d329868d7ecf79963cefe9d9) )

https://github.com/mamedev/mame/commit/461df167c642f057e8d77a26f858260d5212899c

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