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Improved video emulation in cb2001 [David Haywood]

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This commit is contained in:
Angelo Salese 2010-07-05 11:53:00 +00:00
parent 1538288109
commit cc86ec423e
1 changed files with 47 additions and 6 deletions
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53
src/mame/drivers/cb2001.c
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@ -330,6 +330,7 @@ e328e 18 c0 xor al,al
*/
static UINT16 *cb2001_vram;
static int cb2001_videobank;
static VIDEO_START(cb2001)
{
@ -347,15 +348,44 @@ static VIDEO_UPDATE(cb2001)
for (x=0;x<64;x++)
{
int tile;
int colour;
tile = (cb2001_vram[count] & 0x3fff);
drawgfx_opaque(bitmap,cliprect,screen->machine->gfx[0],tile,0,0,0,x*8,y*8);
tile = (cb2001_vram[count] & 0x0fff);
colour = (cb2001_vram[count] & 0xf000)>>12;
tile += cb2001_videobank*0x2000;
drawgfx_opaque(bitmap,cliprect,screen->machine->gfx[0],tile,colour,0,0,x*8,y*8);
count++;
}
}
return 0;
}
/* these ports sometimes get written with similar values
- they could be hooked up wrong, or subject to change it the code
is being executed incorrectly */
WRITE16_HANDLER( cb2001_vidctrl_w )
{
if (mem_mask&0xff00) // video control?
{
printf("cb2001_vidctrl_w %04x %04x\n", data, mem_mask);
cb2001_videobank = (data & 0x0800)>>11;
}
else // something else
logerror("cb2001_vidctrl_w %04x %04x\n", data, mem_mask);
}
WRITE16_HANDLER( cb2001_vidctrl2_w )
{
if (mem_mask&0xff00) // video control?
{
logerror("cb2001_vidctrl2_w %04x %04x\n", data, mem_mask);
}
else // something else
logerror("cb2001_vidctrl2_w %04x %04x\n", data, mem_mask); // bank could be here instead
}
static ADDRESS_MAP_START( cb2001_map, ADDRESS_SPACE_PROGRAM, 16 )
AM_RANGE(0x00000, 0x1ffff) AM_RAM
AM_RANGE(0x20000, 0x21fff) AM_RAM AM_BASE(&cb2001_vram)
@ -368,6 +398,9 @@ static ADDRESS_MAP_START( cb2001_io, ADDRESS_SPACE_IO, 16 )
AM_RANGE(0x10, 0x13) AM_DEVREADWRITE8("ppi8255_1", ppi8255_r, ppi8255_w, 0xffff) /* DIP switches */
AM_RANGE(0x20, 0x21) AM_DEVREAD8("aysnd", ay8910_r, 0x00ff)
AM_RANGE(0x22, 0x23) AM_DEVWRITE8("aysnd", ay8910_data_address_w, 0xffff)
AM_RANGE(0x30, 0x31) AM_WRITE(cb2001_vidctrl_w)
AM_RANGE(0x32, 0x33) AM_WRITE(cb2001_vidctrl2_w)
ADDRESS_MAP_END
static INPUT_PORTS_START( cb2001 )
@ -573,6 +606,7 @@ static PALETTE_INIT(cb2001)
int r,g,b;
UINT8*proms = memory_region(machine, "proms");
int length = memory_region_length(machine, "proms");
UINT16 dat;
dat = (proms[0x000+i] << 8) | proms[0x200+i];
@ -582,7 +616,14 @@ static PALETTE_INIT(cb2001)
r = ((dat >> 6 )& 0x1f)<<3;
g = ((dat >> 11 ) & 0x1f)<<3;
palette_set_color(machine, i, MAKE_RGB(r, g, b));
if (length==0x400) // are the cb2001 proms dumped incorrectly?
{
if (!(i&0x20)) palette_set_color(machine, (i&0x1f) | ((i&~0x3f)>>1), MAKE_RGB(r, g, b));
}
else
{
palette_set_color(machine, i, MAKE_RGB(r, g, b));
}
}
}
@ -638,7 +679,7 @@ static MACHINE_DRIVER_START( cb2001 )
MDRV_SCREEN_SIZE(64*8, 64*8)
MDRV_SCREEN_VISIBLE_AREA(0, 64*8-1, 0, 32*8-1)
MDRV_PALETTE_LENGTH(0x200)
MDRV_PALETTE_LENGTH(0x100)
MDRV_VIDEO_START(cb2001)
MDRV_VIDEO_UPDATE(cb2001)
@ -667,8 +708,8 @@ ROM_START( scherrym )
ROM_REGION( 0x040000, "boot_prg", 0 )
ROM_LOAD16_WORD( "f11.bin", 0x000000, 0x40000, CRC(8967f58d) SHA1(eb01a16b7d108f5fbe5de8f611b4f77869aedbf1) )
ROM_REGION( 0x080000, "gfx", 0 )
ROM_LOAD( "12a.bin", 0x000000, 0x80000,NO_DUMP ) // missing on PCB
ROM_REGION( 0x080000, "gfx", ROMREGION_ERASEFF )
// ROM_LOAD( "12a.bin", 0x000000, 0x80000,NO_DUMP ) // missing on PCB - 2 PCBs have been found this way, it probably uploads the GFX.
ROM_REGION( 0x400, "proms", 0 )
ROM_LOAD( "n82s135-1.bin", 0x000, 0x100, CRC(66ed363f) SHA1(65bd37842c441c2e712844b07c0cfe37ef16d0ef) )