1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "pci.h"
#include "vga.h"
/*
* S3 Vision964 GUI Accelerator.
*/
static void
snarf(Vga* vga, Ctlr* ctlr)
{
s3generic.snarf(vga, ctlr);
vga->crt[0x22] = vgaxi(Crtx, 0x22);
vga->crt[0x24] = vgaxi(Crtx, 0x24);
vga->crt[0x26] = vgaxi(Crtx, 0x26);
}
static void
options(Vga*, Ctlr* ctlr)
{
ctlr->flag |= Hlinear|Henhanced|Foptions;
}
static void
init(Vga* vga, Ctlr* ctlr)
{
Mode *mode;
ulong x;
int sid, dbl, bpp, divide;
char *val;
if(vga->mode->z > 8)
error("depth %d not supported\n", vga->mode->z);
mode = vga->mode;
if(vga->ramdac && (vga->ramdac->flag & Uclk2)){
resyncinit(vga, ctlr, Uenhanced, 0);
vga->crt[0x00] = ((mode->ht/2)>>3)-5;
vga->crt[0x01] = ((mode->x/2)>>3)-1;
vga->crt[0x02] = ((mode->shb/2)>>3)-1;
x = (mode->ehb/2)>>3;
vga->crt[0x03] = 0x80|(x & 0x1F);
vga->crt[0x04] = (mode->shs/2)>>3;
vga->crt[0x05] = ((mode->ehs/2)>>3) & 0x1F;
if(x & 0x20)
vga->crt[0x05] |= 0x80;
vga->crt[0x13] = mode->x/8;
}
else if(mode->z == 8)
resyncinit(vga, ctlr, Uenhanced, 0);
s3generic.init(vga, ctlr);
/*
if((ctlr->flag & Uenhanced) == 0)
vga->crt[0x33] &= ~0x20;
*/
vga->crt[0x3B] = (vga->crt[0]+vga->crt[4]+1)/2;
if(vga->crt[0x3B] & 0x100)
vga->crt[0x5D] |= 0x40;
vga->crt[0x55] = 0x00;
vga->crt[0x40] &= ~0x10;
vga->crt[0x53] &= ~0x20;
vga->crt[0x58] &= ~0x48;
if(dbattr(vga->attr, "sam512") == 0)
vga->crt[0x58] |= 0x40; /* set 256 word SAM, always works */
vga->crt[0x65] = 0x00;
vga->crt[0x66] &= ~0x07;
vga->crt[0x6D] = 0x00;
if(ctlr->flag & Uenhanced){
if(vga->ramdac && (vga->ramdac->flag & Hsid32))
sid = 32;
else
sid = 64;
if(vga->ramdac && (vga->ramdac->flag & Uclk2))
dbl = 2;
else
dbl = 1;
if(mode->z < 4)
bpp = 4;
else
bpp = mode->z;
divide = sid/(dbl*bpp);
switch(divide){
case 2:
vga->crt[0x66] |= 0x01;
break;
case 4:
vga->crt[0x66] |= 0x02;
break;
case 8:
vga->crt[0x66] |= 0x03;
break;
case 16:
vga->crt[0x66] |= 0x04;
break;
case 32:
vga->crt[0x66] |= 0x05;
break;
}
vga->crt[0x40] |= 0x10;
vga->crt[0x65] |= 0x02;
if(vga->ramdac && (vga->ramdac->flag & Hsid32))
vga->crt[0x66] |= 0x10;
/*
* Some heuristics (what part of aux/vga isn't?)
* to prevent some of the right border appearing
* on the left edge of the screen.
*/
if(dbattr(vga->attr, "vclkphs"))
vga->crt[0x67] |= 0x01;
if(val = dbattr(vga->attr, "delaybl"))
vga->crt[0x6D] |= strtoul(val, 0, 0) & 0x07;
else if(mode->x > 1024)
vga->crt[0x6D] |= 0x01;
else
vga->crt[0x6D] |= 0x03;
if(val = dbattr(vga->attr, "delaysc"))
vga->crt[0x6D] |= (strtoul(val, 0, 0) & 0x07)<<4;
}
}
static void
load(Vga* vga, Ctlr* ctlr)
{
ushort advfunc;
s3generic.load(vga, ctlr);
vgaxo(Crtx, 0x65, vga->crt[0x65]);
vgaxo(Crtx, 0x66, vga->crt[0x66]);
vgaxo(Crtx, 0x6D, vga->crt[0x6D]);
advfunc = 0x0000;
if(ctlr->flag & Uenhanced)
advfunc = 0x0001;
outportw(0x4AE8, advfunc);
}
static void
dump(Vga* vga, Ctlr* ctlr)
{
s3generic.dump(vga, ctlr);
printitem(ctlr->name, "Crt22");
printreg(vga->crt[0x22]);
printitem(ctlr->name, "Crt24");
printreg(vga->crt[0x24]);
printitem(ctlr->name, "Crt26");
printreg(vga->crt[0x26]);
}
Ctlr vision964 = {
"vision964", /* name */
snarf, /* snarf */
options, /* options */
init, /* init */
load, /* load */
dump, /* dump */
};
|
