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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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