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Some really basic California Chase framebuffer emulation.

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This commit is contained in:
Angelo Salese 2009-03-19 00:40:04 +00:00
parent 2b093656cf
commit 073c96665c
1 changed files with 29 additions and 3 deletions
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32
src/mame/drivers/calchase.c
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@ -100,6 +100,7 @@ all files across to new HDD, boots up fine.
static void ide_interrupt(const device_config *device, int state);
static UINT32 *bios_ram;
static UINT32 *vga_vram;
static struct {
const device_config *pit8254;
@ -117,6 +118,31 @@ static VIDEO_START(calchase)
static VIDEO_UPDATE(calchase)
{
int x,y,count,i;
bitmap_fill(bitmap,cliprect,get_black_pen(screen->machine));
count = (0);
for(y=0;y<256;y++)
{
for(x=0;x<320;x+=32)
{
for (i=0;i<32;i++)
{
UINT32 color;
color = (vga_vram[count])>>(32-i) & 0x1;
if((x+i)<video_screen_get_visible_area(screen)->max_x && ((y)+0)<video_screen_get_visible_area(screen)->max_y)
*BITMAP_ADDR32(bitmap, y, x+(32-i)) = screen->machine->pens[color];
}
count++;
}
}
return 0;
}
@ -418,8 +444,8 @@ static WRITE32_HANDLER(bios_ram_w)
static ADDRESS_MAP_START( calchase_map, ADDRESS_SPACE_PROGRAM, 32 )
AM_RANGE(0x00000000, 0x0009ffff) AM_RAM
AM_RANGE(0x000a0000, 0x000bffff) AM_RAM
AM_RANGE(0x000c0000, 0x000c7fff) AM_ROM AM_REGION("video_bios", 0)
AM_RANGE(0x000a0000, 0x000bffff) AM_RAM AM_BASE(&vga_vram)
AM_RANGE(0x000c0000, 0x000c7fff) AM_RAM AM_REGION("video_bios", 0)
AM_RANGE(0x000e0000, 0x000effff) AM_RAM
AM_RANGE(0x000f0000, 0x000fffff) AM_ROMBANK(1)
AM_RANGE(0x000f0000, 0x000fffff) AM_WRITE(bios_ram_w)
@ -641,7 +667,7 @@ static MACHINE_DRIVER_START( calchase )
MDRV_SCREEN_ADD("screen", RASTER)
MDRV_SCREEN_REFRESH_RATE(60)
MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
MDRV_SCREEN_FORMAT(BITMAP_FORMAT_RGB32)
MDRV_SCREEN_SIZE(64*8, 32*8)
MDRV_SCREEN_VISIBLE_AREA(0*8, 64*8-1, 0*8, 32*8-1)