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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
diff -ru orig.bios.c bios.c
--- orig.bios.c Wed Feb 18 11:11:30 1998
+++ bios.c Wed Feb 18 11:14:45 1998
@@ -109,6 +109,12 @@
{ "/dev/fd0", 18, 80, 2 }
};
+DiskTab hdisk[MAXHDISKS] =
+{
+{ "/dev/wd0", 63, 407, 64 },
+{ "/some/file", 32, 120, 64 },
+};
+
int bootdisk = 0x0;
static unsigned pos = INT_ROUTINE_START;
@@ -803,13 +809,13 @@
static DiskTab *get_disk_tab(int num)
{
- if (num < NUMFDISKS)
+ if (num >= 0 && num < NUMFDISKS)
return &fdisk[num];
-
+ if (num >= 0x80 && num < 0x80 + NUMHDISKS)
+ return &hdisk[num&0x7f];
return NULL;
}
-
static int disk_seek(DiskTab *disk, int cylinder, int head, int sector)
{
unsigned pos;
@@ -817,6 +823,9 @@
if (head > disk->heads || cylinder > disk->cylinders ||
sector > disk->sectors)
{
+ D(printf("error h%d>%d or c%d>%d or s%d>%d\n",*bregs[DL],
+ head, disk->heads, cylinder, disk->cylinders,
+ sector, disk->sectors););
CF = 1;
*bregs[AH] = diskerror = 0x4; /* Sector not found */
return -1;
@@ -853,7 +862,8 @@
*bregs[AH] = 0;
*bregs[AL] = diskerror;
break;
- case 2: /* Write sector */
+ case 2: /* Read sector */
+ D(printf("Read sector drive %02Xh\n", *bregs[DL]););
disk = get_disk_tab(*bregs[DL]);
if (!disk)
{
@@ -865,7 +875,7 @@
cylinder = *bregs[CH] + ((*bregs[CL] & 0xc0) << 2);
sector = (*bregs[CL] & 0x3f) -1;
buffer = &c_es[ChangeE(wregs[BX])];
- D(printf("DISK 0x%02X (%s) read [h%d,s%d,t%d](%d)->%04X:%04X\n",
+ D(printf("DISK %02Xh (%s) read [h%d,s%d,c%d](%d)->%04X:%04X\n",
*bregs[DL], disk->name, head, sector, cylinder, *bregs[AL],
sregs[ES], ChangeE(wregs[BX])););
if (disk_seek(disk, cylinder, head, sector))
@@ -884,6 +894,7 @@
CF = 0;
break;
case 3: /* Write sector */
+ D(printf("write sector drive %02Xh\n", *bregs[DL]););
disk = get_disk_tab(*bregs[DL]);
if (!disk)
{
@@ -895,7 +906,7 @@
cylinder = *bregs[CH] + ((*bregs[CL] & 0xc0) << 2);
sector = (*bregs[CL] & 0x3f) -1;
buffer = &c_es[ChangeE(wregs[BX])];
- D(printf("DISK %02Xh (%s) read [h%d,s%d,t%d](%d)->%04X:%04X\n",
+ D(printf("DISK %02Xh (%s) read [h%d,s%d,c%d](%d)->%04X:%04X\n",
*bregs[DL], disk->name, head, sector, cylinder, *bregs[AL],
sregs[ES], ChangeE(wregs[BX])););
if (disk_seek(disk, cylinder, head, sector))
@@ -923,8 +934,9 @@
break;
}
head = *bregs[DH];
- cylinder = *bregs[CH] + ((*bregs[CL] & 0xc0) << 8);
+ cylinder = *bregs[CH] + ((*bregs[CL] & 0xc0) << 2);
sector = (*bregs[CL] & 0x3f) -1;
+ D(printf("h%d c%d s%d\n",head, cylinder, sector););
buffer = &c_es[ChangeE(wregs[BX])];
if (disk_seek(disk, cylinder, head, sector))
break;
@@ -949,12 +961,15 @@
case 18:
*bregs[BL] = 4;
break;
+ default:
+ *bregs[BL] = 0;
}
*bregs[CH] = (disk->cylinders - 1) & 0xff;
- *bregs[CL] = (disk->sectors - 1) | (((disk->cylinders - 1)
+ *bregs[CL] = disk->sectors | (((disk->cylinders - 1)
& 0x300) >> 2);
- *bregs[DH] = disk->heads -1;
+ *bregs[DH] = (disk->heads -1) | (((disk->cylinders - 1)
+ & 0xc00)>> 4);
*bregs[DL] = *bregs[DL] < 0x80 ? NUMFDISKS : NUMHDISKS;
*bregs[AL] = 0;
CF = 0;
@@ -966,6 +981,19 @@
wregs[DX] = 0;
wregs[CX] = 0;
}
+ D(printf("Ret CH=%02Xh, CL=%02Xh, DH=%02Xh, DL=%02Xh\n",
+ *bregs[CH], *bregs[CL], *bregs[DH], *bregs[DL]););
+ break;
+ case 0x12:
+ D(printf("Disk controller ram diag\n"););
+ disk = get_disk_tab(*bregs[DL]);
+ if (disk) {
+ CF = 0;
+ *bregs[AH] = diskerror = 0;
+ } else {
+ CF = 1;
+ *bregs[AH] = diskerror = 0x20;
+ }
break;
case 0x15: /* Get disk type */
D(printf("Get disk type %02Xh\n",*bregs[DL]););
@@ -991,6 +1019,38 @@
*bregs[AH] = 0;
}
break;
+ case 0x18:
+ D(printf("Set media type for format drive %02Xh\n", *bregs[DL]););
+ D(printf("sectors %d\n", (*bregs[CL] & 0x3f)));
+ D(printf("cylinders %d+%d\n",*bregs[CH], ((*bregs[CL] & 0xc0) << 2)));
+
+ disk = get_disk_tab(*bregs[DL]);
+ if (disk) {
+ if (disk->sectors - 1 != (*bregs[CL] & 0x3f)) {
+ printf("INT 13h/18h: sectors %d != %d\n",
+ disk->sectors, (*bregs[CL] & 0x3f));
+ CF = 1;
+ *bregs[AH] = diskerror = 0x0c;
+ }
+ if (disk->cylinders - 1
+ != (*bregs[CH] | ((*bregs[CL] & 0xc0) << 2))) {
+ printf("INT 13h/18h: cylinders %d != %d\n",
+ disk->cylinders,
+ (*bregs[CH] | ((*bregs[CL] & 0xc0) << 2)));
+ CF = 1;
+ *bregs[AH] = diskerror = 0x0c;
+ }
+ /* make 11-byte param table at F000h:E401h ? point ES:DI at it? */
+ *bregs[AH] = diskerror = 0;
+ CF = 0;
+ } else {
+ CF = 1;
+ *bregs[AH] = diskerror = 0x80;
+ }
+ CF = 1;
+ *bregs[AH] = diskerror = 0x01;
+ break;
+
default:
printf("Unimplemented INT 13h function %02Xh\n",*bregs[AH]);
#ifdef PANIC
@@ -998,9 +1058,9 @@
exit_emu();
#endif
break;
- }
+ }
- D(if (CF) printf("Operation failed\n"););
+ D(if (CF) printf("Operation failed\n"); else printf("OK\n"););
}
@@ -1186,24 +1246,25 @@
memcpy(BIOS_base+0xe000,BIOSCOPYRIGHT, sizeof BIOSCOPYRIGHT);
}
+static unsigned char diskparamhd[16];
void init_bios(void)
{
int i;
+ DiskTab *hd;
#ifdef BOOT
DiskTab *boot;
#endif
-/*
-* for (i = 0; i < NUMHDISKS; i++)
-* {
-* if ((hdisk[i].fd = open(hdisk[i].name,O_RDWR)) < 0)
-* {
-* fprintf(stderr, "Cannot open hard disk %s :",hdisk[i].name);
-* perror(NULL);
-* exit(1);
-* }
-* }
-*/
+
+ for (i = 0; i < NUMHDISKS; i++)
+ {
+ if ((hdisk[i].fd = open(hdisk[i].name,O_RDWR)) < 0)
+ {
+ fprintf(stderr, "Cannot open hard disk %s :",hdisk[i].name);
+ perror(NULL);
+ exit(1);
+ }
+ }
for (i = 0; i < NUMFDISKS; i++)
{
if ((fdisk[i].fd = open(fdisk[i].name,O_RDWR)) < 0)
@@ -1236,6 +1297,29 @@
IF = 1;
#endif
+#ifdef MK_HD_PARAMS
+ hd = get_disk_tab(0x80);
+ if (hd) {
+ diskparamhd[0] = (hd->cylinders) & 0xff;
+ diskparamhd[1] = (hd->cylinders) >> 8;
+ diskparamhd[2] = (hd->heads);
+ diskparamhd[3] = 0;
+ diskparamhd[4] = 0;
+ diskparamhd[5] = 0xff;
+ diskparamhd[6] = 0xff;
+ diskparamhd[7] = 0;
+ diskparamhd[8] = 8;
+ diskparamhd[9] = 0;
+ diskparamhd[10] = 0;
+ diskparamhd[11] = 0;
+ diskparamhd[12] = (hd->cylinders) & 0xff;
+ diskparamhd[13] = (hd->cylinders) >> 8;
+ diskparamhd[14] = (hd->sectors);
+ diskparamhd[15] = 0;
+ set_int(0x41, diskparamhd, sizeof(diskparamhd), 0, 0, 0);
+ }
+#endif
+
#ifdef DEBUGGER
signal(SIGINT, (void *)debug_breakin);
#else
@@ -1257,6 +1341,11 @@
}
+char *set_hd(char *file, int hd)
+{
+}
+
+
char *set_boot_type(int type)
{
fdisk[0].heads = 2;
@@ -1289,10 +1378,8 @@
void bios_off(void)
{
-/* int i;
-*
-* for (i = 0; i < NUMHDISKS; i++)
-* close(hdisk[i].fd);
-*/
+ int i;
+
+ for (i = 0; i < NUMHDISKS; i++)
+ close(hdisk[i].fd);
}
-
|
