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#include <u.h>
#include <libc.h>
#include <bio.h>
#include "pci.h"
#include "vga.h"
/*
* S3 86C80[15] GUI Accelerator.
*/
static void
snarf(Vga* vga, Ctlr* ctlr)
{
s3generic.snarf(vga, ctlr);
}
static void
options(Vga*, Ctlr* ctlr)
{
ctlr->flag |= Henhanced|Foptions;
}
static void
init(Vga* vga, Ctlr* ctlr)
{
ulong x;
s3generic.init(vga, ctlr);
vga->crt[0x3B] = vga->crt[0]-5;
if(vga->mode->z > 8)
error("depth %d not supported\n", vga->mode->z);
/*
* Display memory access control.
* Calculation of the M-parameter (Crt54) is
* memory-system and dot-clock dependent, the
* values below are guesses from dumping
* registers.
*/
vga->crt[0x60] = 0xFF;
x = (vga->mode->x)/4;
vga->crt[0x61] = 0x80|((x>>8) & 0x07);
vga->crt[0x62] = (x & 0xFF);
if(vga->mode->x <= 800)
vga->crt[0x54] = 0x88;
else if(vga->mode->x <= 1024)
vga->crt[0x54] = 0xF8;
else
vga->crt[0x54] = 0x40;
}
static void
load(Vga* vga, Ctlr* ctlr)
{
ushort advfunc;
s3generic.load(vga, ctlr);
vgaxo(Crtx, 0x60, vga->crt[0x60]);
vgaxo(Crtx, 0x61, vga->crt[0x61]);
vgaxo(Crtx, 0x62, vga->crt[0x62]);
advfunc = 0x0000;
if(ctlr->flag & Uenhanced){
if(vga->mode->x == 1024 || vga->mode->x == 800)
advfunc = 0x0057;
else
advfunc = 0x0053;
}
outportw(0x4AE8, advfunc);
}
static void
dump(Vga* vga, Ctlr* ctlr)
{
s3generic.dump(vga, ctlr);
}
Ctlr s3801 = {
"s3801", /* name */
snarf, /* snarf */
options, /* options */
init, /* init */
load, /* load */
dump, /* dump */
};
Ctlr s3805 = {
"s3805", /* name */
snarf, /* snarf */
options, /* options */
init, /* init */
load, /* load */
dump, /* dump */
};
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