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vgaclgd542x: support >8bit colors

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This commit is contained in:
cinap_lenrek 2012-08-10 21:03:13 +02:00
parent d1f1be9c57
commit 1132aca4f0
1 changed files with 31 additions and 6 deletions
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37
sys/src/cmd/aux/vga/clgd542x.c
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@ -225,9 +225,6 @@ init(Vga* vga, Ctlr* ctlr)
error("%s: pclk %lud too high (> %lud)\n",
ctlr->name, vga->f[0], gd542x->vclk);
if(mode->z > 8)
error("%s: depth %d not supported\n", ctlr->name, mode->z);
/*
* VCLK3
*/
@ -236,9 +233,27 @@ init(Vga* vga, Ctlr* ctlr)
vga->sequencer[0x0E] = vga->n[0];
vga->sequencer[0x1E] = (vga->d[0]<<1)|vga->p[0];
vga->sequencer[0x07] = 0x00;
if(mode->z == 8)
vga->sequencer[0x07] |= 0x01;
switch(mode->z){
case 32:
vga->sequencer[0x07] = 0x09;
vga->crt[0x28] = 0xc5;
break;
case 24:
vga->sequencer[0x07] = 0x05;
vga->crt[0x28] = 0xc5;
break;
case 16:
vga->sequencer[0x07] = 0x07;
vga->crt[0x28] = 0xc1;
break;
case 8:
vga->sequencer[0x07] = 0x01;
vga->crt[0x28] = 0x00;
break;
default:
vga->sequencer[0x07] = 0x00;
vga->crt[0x28] = 0x00;
}
if(vga->f[0] >= 42000000)
vga->sequencer[0x0F] |= 0x20;
@ -277,6 +292,8 @@ init(Vga* vga, Ctlr* ctlr)
static void
load(Vga* vga, Ctlr* ctlr)
{
int i;
vgaxo(Seqx, 0x0E, vga->sequencer[0x0E]);
vgaxo(Seqx, 0x1E, vga->sequencer[0x1E]);
if(ctlr->flag & Ulinear)
@ -285,6 +302,14 @@ load(Vga* vga, Ctlr* ctlr)
vgaxo(Seqx, 0x0F, vga->sequencer[0x0F]);
vgaxo(Seqx, 0x16, vga->sequencer[0x16]);
/*
* Hack for Hidden DAC Register. Do 4 dummy reads
* of Pixmask first.
*/
for(i = 0; i < 4; i++)
vgai(Pixmask);
vgao(Pixmask, vga->crt[0x28]);
if(vga->mode->interlace == 'v')
vgaxo(Crtx, 0x19, vga->crt[0x19]);
vgaxo(Crtx, 0x1A, vga->crt[0x1A]);