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Simplified video emulation for whitestar.c

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This commit is contained in:
Angelo Salese 2011-09-15 15:06:18 +00:00
parent 909cb007c2
commit 64c83d431f
1 changed files with 5 additions and 8 deletions
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13
src/mame/drivers/whitestar.c
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@ -242,18 +242,15 @@ MC6845_UPDATE_ROW( whitestar_update_row )
{
whitestar_state *state = device->machine().driver_data<whitestar_state>();
UINT8 *vram = state->m_vram + ((ma & 0x100)<<2) + (ra << 4);
int xi;
for (int x = 0; x < 128/8; x++)
{
UINT16 val = (vram[x]<<8) + vram[x+0x200];
val = BITSWAP16(val,15,7,14,6,13,5,12,4,11,3,10,2,9,1,8,0);
*BITMAP_ADDR16(bitmap, ra, x*8 +0) = (val>>14) & 0x03;
*BITMAP_ADDR16(bitmap, ra, x*8 +1) = (val>>12) & 0x03;
*BITMAP_ADDR16(bitmap, ra, x*8 +2) = (val>>10) & 0x03;
*BITMAP_ADDR16(bitmap, ra, x*8 +3) = (val>>8) & 0x03;
*BITMAP_ADDR16(bitmap, ra, x*8 +4) = (val>>6) & 0x03;
*BITMAP_ADDR16(bitmap, ra, x*8 +5) = (val>>4) & 0x03;
*BITMAP_ADDR16(bitmap, ra, x*8 +6) = (val>>2) & 0x03;
*BITMAP_ADDR16(bitmap, ra, x*8 +7) = (val>>0) & 0x03;
for(xi=0;xi<8;xi++)
*BITMAP_ADDR16(bitmap, ra, x*8 + xi) = (val>>(14-xi*2)) & 0x03;
}
}