video/timing updates, game still says "vblank failure" tho
This commit is contained in:
Michaël Banaan Ananas
parent
825b6f94fa
commit
15eef06496
@ -49,23 +49,41 @@ public:
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static SCREEN_UPDATE_IND16( meyc8088 )
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{
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meyc8088_state *state = screen.machine().driver_data<meyc8088_state>();
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UINT8 v[5];
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v[4] = state->m_status << 2 & 0x10; // video5: color prom d4
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for (int y = 0; y < 512; y++)
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if (~state->m_status & 2)
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{
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for (int x = 0; x < 64; x++)
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{
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UINT8 data = state->m_vram[y*64+x];
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for (int i = 0; i < 8; i++)
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{
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bitmap.pix16(y, x << 3 | i) = (data << i & 0x80) ? 1 : 0;
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}
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// screen off
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bitmap.fill(v[4]);
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return 0;
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}
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}
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for (offs_t offs = 0x800; offs < 0x4000; offs+=2)
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{
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UINT8 y = (offs-0x800) >> 6;
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UINT8 x = (offs-0x800) << 2;
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v[0] = state->m_vram[offs|0x0000]; // video1: color prom d0
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v[1] = state->m_vram[offs|0x0001]; // video2: color prom d1
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v[2] = state->m_vram[offs|0x4000]; // video3: color prom d2
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v[3] = state->m_vram[offs|0x4001]; // video4: color prom d3
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for (int i = 0; i < 8; i++)
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bitmap.pix16(y, x | i) = ((v[0] << i) >> 7 & 1) | ((v[1] << i) >> 6 & 2) | ((v[2] << i) >> 5 & 4) | ((v[3] << i) >> 4 & 8) | v[4];
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}
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return 0;
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}
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static SCREEN_VBLANK( meyc8088 )
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{
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meyc8088_state *state = screen.machine().driver_data<meyc8088_state>();
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// INTR on LC255 (pulses at start and end of vblank), INTA hardwired to $20
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generic_pulse_irq_line_and_vector(state->m_maincpu, 0, 0x20, 1);
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}
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/***************************************************************************
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@ -114,7 +132,7 @@ static ADDRESS_MAP_START( meyc8088_map, AS_PROGRAM, 8, meyc8088_state )
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AM_RANGE(0xb1000, 0xb10ff) AM_DEVREADWRITE("i8155_1", i8155_device, memory_r, memory_w)
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AM_RANGE(0xb1800, 0xb1807) AM_DEVREADWRITE("i8155_1", i8155_device, io_r, io_w)
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AM_RANGE(0xb2000, 0xb2000) AM_WRITE(drive_w)
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// AM_RANGE(0xb3000, 0xb3000) AM_NOP // 8251A, debug related
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// AM_RANGE(0xb3000, 0xb3000) AM_NOP // i8251A data (debug related, unpopulated on sold boards)
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// AM_RANGE(0xb3800, 0xb3800) AM_NOP // "
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AM_RANGE(0xb4000, 0xb4000) AM_READWRITE(screen_flip_r, screen_flip_w)
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AM_RANGE(0xb5000, 0xb5000) AM_READWRITE(video5_flip_r, video5_flip_w)
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@ -152,16 +170,10 @@ static WRITE8_DEVICE_HANDLER(meyc8088_common_w)
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logerror("i8155 Port C: %02X\n", data);
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}
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static WRITE_LINE_DEVICE_HANDLER(meyc8088_i8155_1_timer_out)
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{
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// clock 8251A
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//logerror("Timer 1 out %d\n", state);
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}
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static WRITE_LINE_DEVICE_HANDLER(meyc8088_i8155_2_timer_out)
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static WRITE_LINE_DEVICE_HANDLER(meyc8088_sound_out)
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{
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// sound dac
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//logerror("Timer 2 out %d\n", state);
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dac_signed_w(device->machine().device("dac"), 0, state ? 0x7f : 0);
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}
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@ -188,7 +200,7 @@ static const i8155_interface i8155_intf[2] =
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DEVCB_NULL,
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DEVCB_HANDLER(meyc8088_status_r),
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DEVCB_NULL,
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DEVCB_LINE(meyc8088_i8155_1_timer_out)
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DEVCB_NULL // i8251A trigger txc/rxc (debug related, unpopulated on sold boards)
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},
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{
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// all ports set to output
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@ -198,7 +210,7 @@ static const i8155_interface i8155_intf[2] =
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DEVCB_HANDLER(meyc8088_lights1_w),
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DEVCB_NULL,
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DEVCB_HANDLER(meyc8088_common_w),
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DEVCB_LINE(meyc8088_i8155_2_timer_out)
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DEVCB_LINE(meyc8088_sound_out)
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}
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};
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@ -294,32 +306,28 @@ INPUT_PORTS_END
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***************************************************************************/
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static INTERRUPT_GEN( meyc8088_irq )
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{
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// INTR on LC255, INTA hardwired to $20
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device_set_input_line_and_vector(device, 0, HOLD_LINE, 0x20);
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}
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static MACHINE_CONFIG_START( meyc8088, meyc8088_state )
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/* basic machine hardware */
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MCFG_CPU_ADD("maincpu", I8088, XTAL_15MHz / 3)
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MCFG_CPU_PROGRAM_MAP(meyc8088_map)
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MCFG_CPU_VBLANK_INT("screen", meyc8088_irq)
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MCFG_I8155_ADD("i8155_1", XTAL_15MHz / 3, i8155_intf[0])
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MCFG_I8155_ADD("i8155_2", XTAL_15MHz / 3, i8155_intf[1])
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MCFG_I8155_ADD("i8155_1", XTAL_15MHz / (3*2*1), i8155_intf[0])
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MCFG_I8155_ADD("i8155_2", XTAL_15MHz / (3*2*32), i8155_intf[1])
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/* video hardware */
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MCFG_SCREEN_ADD("screen", RASTER)
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MCFG_SCREEN_REFRESH_RATE(60)
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MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500))
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MCFG_SCREEN_SIZE(512,512)
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MCFG_SCREEN_VISIBLE_AREA(0, 512-1, 0, 512-1)
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MCFG_SCREEN_RAW_PARAMS(XTAL_15MHz/3, 320, 0, 256, 261, 0, 224)
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MCFG_SCREEN_UPDATE_STATIC(meyc8088)
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MCFG_SCREEN_VBLANK_STATIC(meyc8088)
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MCFG_PALETTE_LENGTH(8)
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MCFG_PALETTE_LENGTH(32)
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/* sound hardware */
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MCFG_SPEAKER_STANDARD_MONO("mono")
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MCFG_SOUND_ADD("dac", DAC, 0)
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MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
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MACHINE_CONFIG_END
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@ -334,4 +342,4 @@ ROM_START( gldarrow )
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ROM_END
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GAME( 1984, gldarrow, 0, meyc8088, gldarrow, 0, ROT0, "Meyco Games, Inc.", "Golden Arrow", GAME_NOT_WORKING | GAME_NO_SOUND )
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GAME( 1984, gldarrow, 0, meyc8088, gldarrow, 0, ROT0, "Meyco Games, Inc.", "Golden Arrow", GAME_NOT_WORKING )
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