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Improved ET4k rgb8 detection from Carl, nw

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This commit is contained in:
Angelo Salese 2012-02-08 14:08:45 +00:00
parent 29637507ed
commit cf6612fc15
1 changed files with 17 additions and 3 deletions
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20
src/emu/video/pc_vga.c
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@ -174,6 +174,12 @@ static struct
UINT8 id; UINT8 id;
}svga; }svga;
static struct
{
UINT8 reg_3d8;
bool ext_reg_ena;
}et4k;
static struct static struct
{ {
UINT8 memory_config; UINT8 memory_config;
@ -997,7 +1003,7 @@ static void crtc_reg_write(running_machine &machine, UINT8 index, UINT8 data)
vga.crtc.line_compare |= data & 0xff; vga.crtc.line_compare |= data & 0xff;
break; break;
default: default:
//printf("Unhandled CRTC reg w %02x %02x\n",index,data); logerror("Unhandled CRTC reg w %02x %02x\n",index,data);
break; break;
} }
} }
@ -1781,6 +1787,8 @@ static void tseng_seq_reg_write(running_machine &machine, UINT8 index, UINT8 dat
break; break;
} }
} }
svga.rgb8_en = (!(vga.sequencer.data[1] & 8) && (vga.sequencer.data[4] & 8) && vga.gc.shift256 && vga.crtc.div2 && GRAPHIC_MODE);
} }
READ8_HANDLER(tseng_et4k_03c0_r) READ8_HANDLER(tseng_et4k_03c0_r)
@ -1832,6 +1840,9 @@ READ8_HANDLER(tseng_et4k_03d0_r)
case 5: case 5:
res = tseng_crtc_reg_read(space->machine(),vga.crtc.index); res = tseng_crtc_reg_read(space->machine(),vga.crtc.index);
break; break;
case 8:
res = et4k.reg_3d8;
break;
default: default:
res = vga_port_03d0_r(space,offset); res = vga_port_03d0_r(space,offset);
break; break;
@ -1851,9 +1862,12 @@ WRITE8_HANDLER(tseng_et4k_03d0_w)
vga.crtc.data[vga.crtc.index] = data; vga.crtc.data[vga.crtc.index] = data;
tseng_crtc_reg_write(space->machine(),vga.crtc.index,data); tseng_crtc_reg_write(space->machine(),vga.crtc.index,data);
break; break;
/* TODO: investigate about this */
case 8: case 8:
svga.rgb8_en = data & 0x80; et4k.reg_3d8 = data;
if(data == 0xa0)
et4k.ext_reg_ena = true;
else if(data == 0x29)
et4k.ext_reg_ena = false;
break; break;
default: default:
vga_port_03d0_w(space,offset,data); vga_port_03d0_w(space,offset,data);