projects / avrcpm.git / blame
| Commit | Line | Data |
|---|---|---|
| 072e0f3b L |
1 | ; CP/M BIOS for avrcpm\r |
| 2 | ; Copyright (C) 2010 Sprite_tm\r | |
| 3 | ;\r | |
| 4 | ; This program is free software: you can redistribute it and/or modify\r | |
| 5 | ; it under the terms of the GNU General Public License as published by\r | |
| 6 | ; the Free Software Foundation, either version 3 of the License, or\r | |
| 7 | ; (at your option) any later version.\r | |
| 8 | ;\r | |
| 9 | ; This program is distributed in the hope that it will be useful,\r | |
| 10 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of\r | |
| 11 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r | |
| 12 | ; GNU General Public License for more details.\r | |
| 13 | ;\r | |
| 14 | ; You should have received a copy of the GNU General Public License\r | |
| 15 | ; along with this program. If not, see <http://www.gnu.org/licenses/>.\r | |
| 16 | ;\r | |
| 17 | ; $Id: bios.asm 71 2010-08-06 19:38:10Z leo $\r | |
| 18 | ;\r | |
| 19 | \r | |
| 2396f399 | 20 | maclib CFGACPM.LIB\r |
| 072e0f3b L |
21 | \r |
| 22 | aseg\r | |
| 23 | org 100h\r | |
| 24 | .phase bios\r | |
| 25 | .z80\r | |
| 26 | \r | |
| 27 | nsects equ ($-ccp)/128 ;warm start sector count\r | |
| 28 | \r | |
| 29 | jp boot\r | |
| 30 | wboote: \r | |
| 31 | jp wboot\r | |
| 32 | jp const\r | |
| 33 | jp conin\r | |
| 34 | jp conout\r | |
| 35 | jp list\r | |
| 36 | jp punch\r | |
| 37 | jp reader\r | |
| 38 | jp home\r | |
| 39 | jp seldsk\r | |
| 40 | jp settrk\r | |
| 41 | jp setsec\r | |
| 42 | jp setdma\r | |
| 43 | jp read\r | |
| 44 | jp write\r | |
| 45 | jp listst\r | |
| 46 | jp sectran\r | |
| 47 | \r | |
| 48 | .8080\r | |
| 49 | maclib AVRCPM.LIB\r | |
| 50 | \r | |
| 51 | ;Drive A B C D E F G H I J K L\r | |
| 2396f399 | 52 | ;drvtbl: dtbl <dpha,dphb,dphc,dphd, , , , ,dphi,dphj,dphk,dphl>\r |
| 5482d75f L |
53 | ;drvtbl: dtbl <dpha, , , , , , , ,dphi,dphj,dphk,dphl>\r |
| 54 | drvtbl: dtbl < , , , , , , , ,dphi,dphj,dphk,dphl>\r | |
| 072e0f3b L |
55 | \r |
| 56 | ; Name spt bls dks dir cks off\r | |
| 5482d75f L |
57 | ; dpb dpb243, 26, 1024, 243, 64, 64, 2\r |
| 58 | ; dpb dp8192s,32, 4096,2046, 512, 512, 2\r | |
| 59 | ; dpb dp8192, 32, 4096,2046,1024,1024, 2\r | |
| 072e0f3b L |
60 | ; dpb dpbrd, 32, 1024, 56, 32, 0, 2\r |
| 61 | dpb rd1016, 32, 2048, 508, 192, 0, 2\r | |
| 62 | dpb rd1024, 32, 2048, 512, 192, 0, 0\r | |
| 63 | dpb rd0960, 32, 2048, 480, 192, 0, 0\r | |
| 64 | \r | |
| 5482d75f | 65 | ;dpha: dph dpb243\r |
| 072e0f3b L |
66 | ;dphb: dph dpb243\r |
| 67 | ;dphc: dph dpb243\r | |
| 68 | ;dphd: dph dpb243\r | |
| 2396f399 L |
69 | ;dpha: dph dp8192s\r |
| 70 | ;dphb: dph dp8192s\r | |
| 71 | ;dphc: dph dp8192\r | |
| 72 | ;dphd: dph dp8192\r | |
| 072e0f3b L |
73 | dphi: dph rd1016\r |
| 74 | dphj: dph rd1024\r | |
| 75 | dphk: dph rd1024\r | |
| 76 | dphl: dph rd0960\r | |
| 77 | \r | |
| 78 | .z80\r | |
| 79 | \r | |
| 80 | signon:\r | |
| 81 | db cr,lf\r | |
| 82 | db msize/10+'0'\r | |
| 83 | db msize - (msize/10)*10 + '0' ;modulo doesn't work?\r | |
| 84 | db "k cp/m vers 2.2"\r | |
| 85 | msgnl: db cr,lf,0\r | |
| 86 | \r | |
| 2396f399 L |
87 | msgnodisk:\r |
| 88 | db "No disk!"\r | |
| 89 | db cr,lf,0\r | |
| 90 | \r | |
| 072e0f3b L |
91 | const:\r |
| 92 | in a,(0)\r | |
| 93 | ret\r | |
| 94 | \r | |
| 95 | conin:\r | |
| 96 | in a,(0)\r | |
| 97 | cp 0ffh\r | |
| 98 | jp nz,conin\r | |
| 99 | \r | |
| 100 | in a,(1)\r | |
| 101 | ret\r | |
| 102 | \r | |
| 103 | conout:\r | |
| 104 | ld a,c\r | |
| 2396f399 | 105 | out (1),a\r |
| 072e0f3b L |
106 | ret\r |
| 107 | \r | |
| 108 | list:\r | |
| 109 | ret\r | |
| 110 | \r | |
| 111 | listst:\r | |
| 112 | ld a,0\r | |
| 113 | ret\r | |
| 114 | \r | |
| 115 | punch:\r | |
| 116 | ret\r | |
| 117 | \r | |
| 118 | reader:\r | |
| 119 | ld a,01Fh\r | |
| 120 | ret\r | |
| 121 | \r | |
| 122 | prmsg:\r | |
| 123 | ld a,(hl)\r | |
| 124 | or a\r | |
| 125 | ret z\r | |
| 126 | push hl\r | |
| 127 | ld c,a\r | |
| 128 | call conout\r | |
| 129 | pop hl\r | |
| 130 | inc hl\r | |
| 131 | jp prmsg\r | |
| 132 | \r | |
| 133 | prhex:\r | |
| 134 | ld a,c\r | |
| 135 | push af\r | |
| 136 | rra \r | |
| 137 | rra \r | |
| 138 | rra \r | |
| 139 | rra \r | |
| 140 | call prhexdigit\r | |
| 141 | pop af\r | |
| 142 | ; fall thru\r | |
| 143 | \r | |
| 144 | prhexdigit:\r | |
| 145 | and 00fh\r | |
| 146 | cp 10\r | |
| 147 | jp c,prd1\r | |
| 148 | add a,7\r | |
| 149 | prd1:\r | |
| 150 | add a,'0'\r | |
| 151 | ld c,a\r | |
| 152 | jp conout\r | |
| 153 | \r | |
| 072e0f3b L |
154 | boot:\r |
| 155 | ld sp,buff\r | |
| 156 | ld hl,signon\r | |
| 157 | call prmsg\r | |
| 158 | \r | |
| 2396f399 L |
159 | ld a,low bcb\r |
| 160 | out (13),a\r | |
| 161 | ld a, high bcb\r | |
| 162 | out (14),a\r | |
| 163 | \r | |
| 072e0f3b L |
164 | xor a\r |
| 165 | ld (bootdsk),a\r | |
| 166 | ld e,a\r | |
| 2396f399 L |
167 | ld c,a\r |
| 168 | call seldsk\r | |
| 169 | jp nz,boot0\r | |
| 170 | ld hl,msgnodisk\r | |
| 171 | call prmsg\r | |
| 172 | halt\r | |
| 173 | boot0:\r | |
| 174 | call getdpb\r | |
| 175 | ld a,(de) ;dpb[0] is sectors_per_track\r | |
| 072e0f3b | 176 | ld (bootspt),a\r |
| 2396f399 | 177 | ld e,0\r |
| 072e0f3b L |
178 | ld c,'I'-'A'\r |
| 179 | call seldsk\r | |
| 92202636 | 180 | jp z,boot1 ;no ram disk\r |
| 072e0f3b | 181 | \r |
| 2396f399 | 182 | call getdpb ;de = dpb of first ram disk\r |
| 072e0f3b L |
183 | \r |
| 184 | ; Check, if we have reserved tracks.\r | |
| 185 | \r | |
| 186 | ld hl,13\r | |
| 187 | add hl,de\r | |
| 188 | \r | |
| 189 | ld a,(hl) ;# of reserved tracks \r | |
| 190 | inc hl\r | |
| 191 | or (hl)\r | |
| 192 | jp z,boot1 ;Skip if not.\r | |
| 193 | \r | |
| 194 | ; Save CPM to ram disk.\r | |
| 195 | \r | |
| 196 | ld a,(de) ;sectors per track\r | |
| 197 | ld (bootspt),a\r | |
| 198 | ld a,'I'-'A'\r | |
| 199 | ld (bootdsk),a\r | |
| 200 | call home\r | |
| 201 | ld b,nsects\r | |
| 202 | ld c,0 ;track\r | |
| 203 | ld d,1 ;sektor (0 based, skip ipl)\r | |
| 204 | ld hl,ccp\r | |
| 205 | store1:\r | |
| 206 | push bc\r | |
| 207 | push de\r | |
| 208 | push hl\r | |
| 209 | ld c,d\r | |
| 210 | ld b,0\r | |
| 211 | call setsec\r | |
| 212 | pop bc ;dma\r | |
| 213 | push bc\r | |
| 214 | call setdma\r | |
| 215 | ld c,0\r | |
| 216 | call write\r | |
| 217 | \r | |
| 218 | pop hl ;dma\r | |
| 219 | ld de,128\r | |
| 220 | add hl,de\r | |
| 221 | pop de ;d = sec\r | |
| 222 | pop bc ;b = # of secs, c = track\r | |
| 223 | dec b\r | |
| 224 | jp z,boot1\r | |
| 225 | \r | |
| 226 | inc d\r | |
| 227 | ld a,(bootspt)\r | |
| 228 | dec a\r | |
| 229 | cp d ;if sector >= spt then change tracks\r | |
| 230 | jp nc,store1\r | |
| 231 | \r | |
| 232 | ld d,0\r | |
| 233 | inc c\r | |
| 234 | push bc\r | |
| 235 | push de\r | |
| 236 | push hl\r | |
| 237 | ld b,0\r | |
| 238 | call settrk \r | |
| 239 | pop hl\r | |
| 240 | pop de\r | |
| 241 | pop bc\r | |
| 242 | jp store1\r | |
| 243 | \r | |
| 244 | boot1: \r | |
| 245 | xor a\r | |
| 246 | ld (iobyte),a\r | |
| 247 | ld (cdisk),a\r | |
| 248 | jp gocpm \r | |
| 249 | \r | |
| 250 | wboot: ;re-load CP/M\r | |
| 251 | ld sp,buff\r | |
| 252 | ld a,1 shl BOOT_FUNC ;init (de)blocking\r | |
| 253 | out (22),a\r | |
| 254 | ld a,(bootdsk)\r | |
| 255 | ld c,a\r | |
| 256 | call seldsk\r | |
| 257 | call home\r | |
| 258 | ld b,nsects\r | |
| 259 | ld c,0 ;track\r | |
| 260 | ld d,1 ;sektor (0 based)\r | |
| 261 | ld hl,ccp\r | |
| 262 | load1:\r | |
| 263 | push bc\r | |
| 264 | push de\r | |
| 265 | push hl\r | |
| 266 | ld c,d\r | |
| 267 | ld b,0\r | |
| 268 | call setsec\r | |
| 269 | pop bc\r | |
| 270 | push bc\r | |
| 271 | call setdma\r | |
| 272 | call read\r | |
| 273 | cp 0 ;read error?\r | |
| 274 | jp nz,wboot\r | |
| 275 | \r | |
| 276 | pop hl\r | |
| 277 | ld de,128\r | |
| 278 | add hl,de\r | |
| 279 | pop de\r | |
| 280 | pop bc\r | |
| 281 | dec b\r | |
| 282 | jp z,gocpm\r | |
| 283 | \r | |
| 284 | inc d\r | |
| 285 | ld a,(bootspt)\r | |
| 286 | dec a\r | |
| 287 | cp d ;if sector >= spt then change tracks\r | |
| 288 | jp nc,load1\r | |
| 289 | \r | |
| 290 | ld d,0\r | |
| 291 | inc c\r | |
| 292 | push bc\r | |
| 293 | push de\r | |
| 294 | push hl\r | |
| 295 | ld b,0\r | |
| 296 | call settrk \r | |
| 297 | pop hl\r | |
| 298 | pop de\r | |
| 299 | pop bc\r | |
| 300 | jp load1\r | |
| 301 | \r | |
| 302 | gocpm:\r | |
| 303 | ld a,0c3h\r | |
| 304 | ld (0),a\r | |
| 305 | ld hl,wboote\r | |
| 306 | ld (1),hl\r | |
| 307 | ld (5),a\r | |
| 308 | ld hl,bdos\r | |
| 309 | ld (6),hl\r | |
| 310 | \r | |
| 311 | ld bc,buff\r | |
| 312 | call setdma\r | |
| 313 | ld a,(cdisk)\r | |
| 314 | ld c,a\r | |
| 315 | jp ccp\r | |
| 316 | \r | |
| 317 | msgSel: db 13,10,"Sel: ",0\r | |
| 318 | \r | |
| 2396f399 L |
319 | getdpb:\r |
| 320 | ld de,10\r | |
| 321 | add hl,de\r | |
| 322 | ld e,(hl)\r | |
| 323 | inc hl\r | |
| 324 | ld d,(hl) ;de = dpb\r | |
| 325 | ret\r | |
| 326 | \r | |
| 072e0f3b | 327 | seldsk:\r |
| 2396f399 L |
328 | ld a,c\r |
| 329 | out (15),a\r | |
| 330 | \r | |
| 331 | ld a,e ;reselection bit\r | |
| 332 | rrca\r | |
| 333 | jp c,getdph ;skip, if disk already active\r | |
| 2396f399 | 334 | ld hl,0\r |
| 92202636 | 335 | in a,(15) ;querry, if disk exists\r |
| 2396f399 | 336 | or a\r |
| 92202636 | 337 | ret z\r |
| 2396f399 L |
338 | getdph:\r |
| 339 | ld hl,drvtbl\r | |
| 072e0f3b L |
340 | ld b,0\r |
| 341 | add hl,bc\r | |
| 342 | add hl,bc\r | |
| 343 | ld a,(hl) ;get table entry for selected disk\r | |
| 344 | inc hl\r | |
| 345 | ld h,(hl)\r | |
| 346 | ld l,a \r | |
| 2396f399 | 347 | or h ;return zero, if no entry (no disk)\r |
| 072e0f3b | 348 | ret\r |
| 2396f399 | 349 | \r |
| 072e0f3b L |
350 | \r |
| 351 | home:\r | |
| 352 | ld a,1 shl HOME_FUNC\r | |
| 353 | out (22),a\r | |
| 354 | \r | |
| 355 | ld bc,0 ; same as seek to track 0\r | |
| 356 | settrk:\r | |
| 357 | ld a,c\r | |
| 358 | out (16),a\r | |
| 359 | ld a,b\r | |
| 360 | out (17),a\r | |
| 361 | ret\r | |
| 362 | \r | |
| 363 | setsec:\r | |
| 364 | ld a,c\r | |
| 365 | out (18),a\r | |
| 366 | ret\r | |
| 367 | \r | |
| 368 | setdma:\r | |
| 369 | ld a,c\r | |
| 370 | out (20),a\r | |
| 371 | ld a,b\r | |
| 372 | out (21),a\r | |
| 373 | ret\r | |
| 374 | \r | |
| 375 | read:\r | |
| 376 | ld a,1 shl READ_FUNC\r | |
| 377 | out (22),a\r | |
| 378 | in a,(22)\r | |
| 379 | and 1\r | |
| 380 | ret\r | |
| 381 | \r | |
| 382 | write:\r | |
| 383 | ld a,c\r | |
| 384 | and 3 ;mask write type\r | |
| 385 | or 1 shl WRITE_FUNC\r | |
| 386 | out (22),a\r | |
| 387 | in a,(22)\r | |
| 388 | and 1\r | |
| 389 | ret\r | |
| 390 | \r | |
| 391 | sectran:\r | |
| 392 | ;translate sector bc using table at de, res into hl\r | |
| 393 | ld h,b\r | |
| 394 | ld l,c\r | |
| 395 | ld a,d\r | |
| 396 | or e\r | |
| 397 | ret z\r | |
| 398 | ex de,hl\r | |
| 399 | add hl,bc\r | |
| 400 | ld l,(hl)\r | |
| 401 | ld h,0\r | |
| 402 | ret\r | |
| 403 | \r | |
| 2396f399 L |
404 | bcb: dw drvtbl\r |
| 405 | dw dirbuf\r | |
| 406 | dw enddat\r | |
| 407 | \r | |
| 072e0f3b L |
408 | bootdsk:ds 1\r |
| 409 | bootspt:ds 1\r | |
| 410 | \r | |
| 411 | .8080\r | |
| 412 | endef\r | |
| 413 | \r | |
| 414 | end\r | |
| 415 | \r |