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Commented out temporarily the CRTC, adding custom

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screen parameters and measured v-frequency.
This commit is contained in:
Roberto Fresca 2011-04-11 05:16:42 +00:00
parent 4d1dd242c1
commit 676585ee41
1 changed files with 14 additions and 15 deletions
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13
src/mame/drivers/majorpkr.c
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@ -601,6 +601,7 @@ static WRITE8_HANDLER(vram_w)
{
majorpkr_state *state = space->machine().driver_data<majorpkr_state>();
state->m_videoram[state->m_vram_bank * 0x800 + offset] = data;
if (state->m_vram_bank == 0)
{
tilemap_mark_tile_dirty(state->m_fg_tilemap, offset >> 1);
@ -812,8 +813,8 @@ static ADDRESS_MAP_START( portmap, AS_IO, 8 )
AM_RANGE(0x14, 0x14) AM_READ_PORT("TEST") /* "freeze" switch */
AM_RANGE(0x14, 0x14) AM_WRITE(lamps_b_w) /* lamps b out */
AM_RANGE(0x30, 0x30) AM_DEVWRITE("crtc", mc6845_address_w)
AM_RANGE(0x31, 0x31) AM_DEVREADWRITE("crtc", mc6845_register_r, mc6845_register_w)
// AM_RANGE(0x30, 0x30) AM_DEVWRITE("crtc", mc6845_address_w)
// AM_RANGE(0x31, 0x31) AM_DEVREADWRITE("crtc", mc6845_register_r, mc6845_register_w)
AM_RANGE(0x50, 0x50) AM_DEVREADWRITE_MODERN("oki", okim6295_device, read, write)
AM_RANGE(0x60, 0x60) AM_WRITENOP /* leftover from a PSG SN76489/96? */
@ -1034,11 +1035,12 @@ static MACHINE_CONFIG_START( majorpkr, majorpkr_state )
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_REFRESH_RATE(52.786)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
MCFG_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
MCFG_SCREEN_SIZE((47+1)*16, (36+1)*8) /* through CRTC registers: 768 x 296 */
MCFG_SCREEN_VISIBLE_AREA(0, (36*16)-1, 0, (28*8)-1) /* through CRTC registers: 560(+16) x 224 */
// MCFG_SCREEN_VISIBLE_AREA(0, (36*16)-1, 0, (28*8)-1) /* through CRTC registers: 560(+16) x 224 */
MCFG_SCREEN_VISIBLE_AREA(0, (35*16)-1, 0, (28*8)-1)
MCFG_GFXDECODE(majorpkr)
MCFG_PALETTE_LENGTH(0x100 * 16)
@ -1085,9 +1087,6 @@ static DRIVER_INIT( majorpkr )
{
UINT8 * ROM = (UINT8 *)machine.region("maincpu")->base();
memory_configure_bank(machine, "rom_bank", 0, 4, &ROM[0x10000], 0x800);
/* hidding the last unused column. masking the CRTC register */
ROM[0x30ca] = 0x23;
}