projects / z180-stamp.git / blame
| Commit | Line | Data |
|---|---|---|
| a16ba2b0 L |
1 | page 255\r |
| 2 | .z80\r | |
| 3 | \r | |
| 4 | extrn ddtz,bpent\r | |
| 5 | extrn $stack\r | |
| 6 | extrn $coninit,$cists,$ci\r | |
| 7 | \r | |
| 8 | extrn romend\r | |
| 9 | \r | |
| 10 | \r | |
| 11 | global isv_sw\r | |
| 12 | \r | |
| 13 | include config.inc\r | |
| 14 | include z180reg.inc\r | |
| 15 | include z180.lib\r | |
| 16 | \r | |
| f4d5b4fe | 17 | ;CR equ 0dh\r |
| a16ba2b0 L |
18 | \r |
| 19 | \r | |
| 20 | \r | |
| 21 | ;----------------------------------------------------------------------\r | |
| 22 | \r | |
| 23 | cseg\r | |
| 24 | \r | |
| 25 | jp start \r | |
| 26 | \r | |
| 27 | ; restart vectors\r | |
| 28 | \r | |
| 29 | rsti defl 1\r | |
| 30 | rept 7\r | |
| 31 | db 0, 0, 0, 0, 0\r | |
| 32 | jp bpent\r | |
| 33 | rsti defl rsti+1\r | |
| 34 | endm\r | |
| 35 | \r | |
| 36 | ;----------------------------------------------------------------------\r | |
| 37 | \r | |
| 38 | if ROMSYS\r | |
| 39 | $crom: defb c$rom ;\r | |
| 40 | else\r | |
| 41 | db 0 ;\r | |
| 42 | endif\r | |
| 43 | \r | |
| 44 | dmclrt: ;clear ram per dma\r | |
| 45 | db dmct_e-dmclrt-2 ;\r | |
| 46 | db sar0l ;first port\r | |
| 47 | dw nullbyte ;src (fixed) \r | |
| 48 | nullbyte:\r | |
| 49 | db 000h ;src\r | |
| 50 | dw romend ;dst (inc), start after "rom" code\r | |
| 51 | db 00h ;dst\r | |
| 52 | dw 0-romend ;count (64k)\r | |
| 53 | dmct_e:\r | |
| 54 | \r | |
| a16ba2b0 L |
55 | INIWAITS defl CWAITIO\r |
| 56 | if ROMSYS\r | |
| 57 | INIWAITS defl INIWAITS+CWAITROM\r | |
| 58 | endif\r | |
| 59 | \r | |
| 60 | hwini0:\r | |
| 61 | db 3 ;count\r | |
| 62 | db rcr,CREFSH ;configure DRAM refresh\r | |
| 63 | db dcntl,INIWAITS ;wait states\r | |
| 64 | db cbar,SYS$CBAR\r | |
| 65 | \r | |
| 66 | ;----------------------------------------------------------------------\r | |
| 67 | \r | |
| 68 | start:\r | |
| 69 | push af ;003c\r | |
| 70 | in0 a,(itc) ;003d Illegal opcode trap?\r | |
| 71 | jp p,??st01 ;0040\r | |
| 72 | pop af ;0043\r | |
| 73 | jp bpent ;0044 yes, handle\r | |
| 74 | \r | |
| 75 | ??st01:\r | |
| 76 | ld a,i ;0047 I register == 0 ? \r | |
| 77 | jr z,??st02 ;004b yes, harware reset\r | |
| 78 | pop af ;004d \r | |
| 79 | jp bpent ;004e no, allready set up\r | |
| 80 | \r | |
| 81 | ??st02:\r | |
| 82 | di ;0058\r | |
| 83 | ld a,CREFSH\r | |
| 84 | out0 (rcr),a ; configure DRAM refresh\r | |
| 85 | ld a,CWAITIO\r | |
| 86 | out0 (dcntl),a ; wait states\r | |
| 87 | \r | |
| 88 | ; search warm start mark\r | |
| 89 | \r | |
| 90 | ld ix,mark_55AA ;00b8 ; top of common area\r | |
| 91 | ld a,SYS$CBAR ;\r | |
| 92 | out0 (cbar),a ;\r | |
| 93 | ld a,071h ;00bc\r | |
| 94 | ex af,af' ;00be ;for cbr = 0x70 downto 0x40\r | |
| 95 | swsm_l:\r | |
| 96 | ex af,af' ;00bf \r | |
| 97 | dec a ;00c0\r | |
| 98 | cp 03fh ;00c1\r | |
| 99 | jr z,kstart ;00c3 ; break (mark not found)\r | |
| 100 | out0 (cbr),a ;00c5\r | |
| 101 | ex af,af' ;00c8\r | |
| 102 | ld a,0aah ;00c9\r | |
| 103 | cp (ix+000h) ;00cb\r | |
| 104 | jr nz,swsm_l ;00ce\r | |
| 105 | cp (ix+002h) ;00d0\r | |
| 106 | jr nz,swsm_l ;00d3\r | |
| 107 | cpl ;00d5\r | |
| 108 | cp (ix+001h) ;00d6\r | |
| 109 | jr nz,swsm_l ;00d9\r | |
| 110 | cp (ix+003h) ;00db\r | |
| 111 | jr nz,swsm_l ;00de\r | |
| 112 | ld sp,$stack ;00e0 mark found, check\r | |
| 113 | call checkcrc_alv ;00e3\r | |
| 114 | jp z,wstart ;00e6 check ok,\r | |
| 115 | \r | |
| 116 | ;\r | |
| 117 | ; ram not ok, initialize -- kstart --\r | |
| 118 | \r | |
| 119 | kstart:\r | |
| 120 | \r | |
| 121 | ld a,088h ;00e9 0000-7fff: common 0\r | |
| 122 | out0 (cbar),a ;00eb 8000-ffff: common 1\r | |
| 123 | ld ix,08000h ;00f3\r | |
| 124 | ld a,0 ;00f1 start at 008000 (2. phys. 32k block)\r | |
| 125 | ??f_0:\r | |
| 126 | out0 (cbr),a ;00f9\r | |
| 127 | \r | |
| 128 | ld (ix+0),a ;0103 \r | |
| 129 | cpl\r | |
| 130 | ld (ix+1),a ;0103 \r | |
| 131 | cpl\r | |
| 132 | add a,8 ;010a next 'bank'\r | |
| 133 | cp 078h ;010c stop at 078000\r | |
| 134 | jr nz,??f_0 ;010e\r | |
| 135 | \r | |
| 136 | ld de,8000h ;0114 first block not tested, but mark as ok\r | |
| 137 | ld a,0 ;00f1 start at 008000 (2. phys. 32k block)\r | |
| 138 | ??cp_0:\r | |
| 139 | out0 (cbr),a ;011c\r | |
| 140 | ld c,a\r | |
| 141 | xor (ix+0)\r | |
| 142 | ld b,a\r | |
| 143 | ld a,c\r | |
| 144 | cpl\r | |
| 145 | xor (ix+1)\r | |
| 146 | or b\r | |
| 147 | jr nz,??cp_1\r | |
| 148 | scf\r | |
| 149 | ??cp_1:\r | |
| 150 | rr d\r | |
| 151 | rr e\r | |
| 152 | ld a,c\r | |
| 153 | add a,8\r | |
| 154 | cp 078h ; stop at 078000\r | |
| 155 | jr nz,??cp_0\r | |
| 156 | \r | |
| 157 | ;\r | |
| 158 | ; ram test found 1 or more error free blocks (32k)\r | |
| 159 | ;\r | |
| 160 | \r | |
| 161 | ramok:\r | |
| 162 | ld a,SYS$CBAR ;01c8\r | |
| 163 | out0 (cbar),a ;01ca\r | |
| 164 | ld h,d\r | |
| 165 | ld l,e\r | |
| 166 | ld c,070h ;01ce highest block\r | |
| 167 | ld b,15 ;01d0\r | |
| 168 | ??sr_1:\r | |
| 169 | add hl,hl\r | |
| 170 | jr c,alloc ;01d4 highest "error free" block\r | |
| 171 | ld a,c ;01d6\r | |
| 172 | sub 008h ;01d7\r | |
| 173 | ld c,a ;01d9\r | |
| 174 | djnz ??sr_1 ;01da\r | |
| 175 | \r | |
| 176 | slp ;01dc should never be reached\r | |
| 177 | \r | |
| 178 | alloc:\r | |
| 179 | out0 (cbr),c ;01de\r | |
| 180 | ld sp,$stack ;01e1\r | |
| 181 | \r | |
| 182 | ; Clear RAM using DMA0\r | |
| 183 | \r | |
| 184 | ld hl,dmclrt ;load DMA registers\r | |
| 185 | call io.ini.m\r | |
| 186 | ld a,0cbh ;01ef dst +1, src fixed, burst\r | |
| 187 | out0 (dmode),a ;01f1\r | |
| 188 | \r | |
| 189 | ld b,512/64\r | |
| 190 | ld a,062h ;01f4 enable dma0, \r | |
| 191 | ??cl_1:\r | |
| 192 | out0 (dstat),a ;01f9 clear (up to) 64k\r | |
| 193 | djnz ??cl_1 ; end of RAM?\r | |
| 194 | \r | |
| 195 | ; Init bank manager\r | |
| 196 | \r | |
| 197 | ld hl,banktabsys ;020f\r | |
| 198 | ld (hl),c ; Common area\r | |
| 199 | inc hl ;0213\r | |
| 200 | ld (hl),c ; System work area\r | |
| 201 | inc hl ;0215 Point to bank 0 entry\r | |
| 202 | ld b,BANKS ;0216\r | |
| 203 | l0218h:\r | |
| 204 | ld (hl),0ffh ;0218 Mark all banks as unassigned\r | |
| 205 | inc hl ;021a\r | |
| 206 | djnz l0218h ;021b\r | |
| 207 | \r | |
| 208 | ld hl,memalv ;\r | |
| 209 | ld b,8 ; 8*4k ie. first 32k\r | |
| 210 | ??a_0:\r | |
| 211 | ld (hl),0e0h ; mark as sys ("rom"/monitor)\r | |
| 212 | inc hl\r | |
| 213 | djnz ??a_0\r | |
| 214 | \r | |
| 215 | rr d ; shift out bit for block 0\r | |
| 216 | rr e ;\r | |
| 217 | ld c,15 ;022c 15*32k remaining blocks\r | |
| 218 | l022eh:\r | |
| 219 | ld a,0feh ; 0xfe == block with error(s)\r | |
| 220 | rr d ;\r | |
| 221 | rr e\r | |
| 222 | adc a,0 ; ==> 0xff : block ok\r | |
| 223 | ld b,32/4 ; 32k == 8 * 4k \r | |
| 224 | l0236h:\r | |
| 225 | ld (hl),a ;\r | |
| 226 | inc hl ;\r | |
| 227 | djnz l0236h ;\r | |
| 228 | dec c ;\r | |
| 229 | jr nz,l022eh ;next 32k block\r | |
| 230 | \r | |
| 231 | ld hl,memalv+0ch ;memalv+0ch\r | |
| 232 | ld a,(banktabsys) ;\r | |
| 233 | call add_hl_a\r | |
| 234 | ld b,3 ;\r | |
| 235 | l024ah:\r | |
| 236 | ld (hl),0ech ;alloc system ram\r | |
| 237 | inc hl ;\r | |
| 238 | djnz l024ah ;\r | |
| 239 | ld (hl),0efh ;alloc common\r | |
| 240 | call gencrc_alv\r | |
| 241 | \r | |
| 242 | ld hl,0000h ;bank # \r | |
| 243 | ld bc,0f0fh ; size (?) (4k blocks)\r | |
| 244 | xor a ;\r | |
| 245 | call sub_0420h ;alloc mem for bank 0\r | |
| 246 | ld c,l ;\r | |
| 247 | or a ;\r | |
| 248 | call z,sub_04b5h ;\r | |
| 249 | \r | |
| 250 | ld hl,0101h ;\r | |
| 251 | ld bc,0f0fh ;\r | |
| 252 | xor a ;\r | |
| 253 | call sub_0420h ;\r | |
| 254 | ld c,l ;\r | |
| 255 | or a ;\r | |
| 256 | call z,sub_04b5h ;\r | |
| 257 | \r | |
| 258 | ld hl,055AAh ;set warm start mark\r | |
| 259 | ld (mark_55AA),hl ;\r | |
| 260 | ld (mark_55AA+2),hl;\r | |
| 261 | \r | |
| 262 | ;\r | |
| 263 | ; crc ok -- wstart --\r | |
| 264 | ;\r | |
| 265 | wstart:\r | |
| 266 | call sysram_init ;027f\r | |
| 267 | call ivtab_init\r | |
| 268 | \r | |
| 269 | call prt0_init\r | |
| 270 | \r | |
| 271 | \r | |
| 272 | call bufferinit\r | |
| 273 | \r | |
| 274 | \r | |
| 275 | call $coninit\r | |
| 276 | \r | |
| 277 | \r | |
| 278 | \r | |
| 279 | \r | |
| 280 | im 2 ;?030e\r | |
| 281 | ei ;0282\r | |
| 282 | \r | |
| 283 | call $cists ;0284\r | |
| 284 | call $cists ;0287\r | |
| 285 | or a ;028a\r | |
| 286 | call nz,$ci ;028d\r | |
| 287 | \r | |
| 288 | ld a,(banktab) ; \r | |
| 289 | ld e,a ; \r | |
| 290 | jp ddtz ;0290\r | |
| 291 | \r | |
| 292 | \r | |
| 293 | ;\r | |
| 294 | ;----------------------------------------------------------------------\r | |
| 295 | ;\r | |
| 296 | \r | |
| 297 | extrn msginit,msg.sout,msg_fifo\r | |
| 298 | extrn tx.buf,rx.buf\r | |
| 299 | \r | |
| 300 | \r | |
| 301 | ;TODO: Make a ringbuffer module.\r | |
| 302 | \r | |
| 303 | global buf.init\r | |
| 304 | \r | |
| 305 | buf.init:\r | |
| 306 | ld (ix+o.in_idx),0\r | |
| 307 | ld (ix+o.out_idx),0\r | |
| 308 | ld (ix+o.mask),a\r | |
| 309 | ret\r | |
| 310 | \r | |
| 311 | ;----------------------------------------------------------------------\r | |
| 312 | \r | |
| 313 | bufferinit:\r | |
| 314 | call msginit\r | |
| 315 | \r | |
| 316 | ld hl,buffers\r | |
| 317 | ld bc,0300h\r | |
| 318 | bfi_1:\r | |
| 319 | ld e,(hl)\r | |
| 320 | inc hl\r | |
| 321 | ld d,(hl)\r | |
| 322 | inc hl\r | |
| 323 | push hl\r | |
| 324 | in0 a,cbr\r | |
| 325 | call log2phys\r | |
| 326 | ld (bufdat+1),hl\r | |
| 327 | ld (bufdat+3),a\r | |
| 328 | ld a,c\r | |
| 329 | ld (bufdat+0),a\r | |
| 330 | ld hl,inimsg\r | |
| 331 | call msg.sout\r | |
| 332 | pop hl\r | |
| 333 | inc c\r | |
| 334 | djnz bfi_1\r | |
| 335 | ret\r | |
| 336 | \r | |
| 337 | rept 20\r | |
| 338 | db 0\r | |
| 339 | endm\r | |
| 340 | \r | |
| 341 | buffers:\r | |
| 342 | dw msg_fifo\r | |
| 343 | dw tx.buf\r | |
| 344 | dw rx.buf\r | |
| 345 | \r | |
| 346 | inimsg: \r | |
| 347 | db inimsg_e - $ -2\r | |
| 348 | db PMSG\r | |
| 349 | db 81h\r | |
| 350 | db inimsg_e - $ -1\r | |
| 351 | db 0\r | |
| 352 | bufdat:\r | |
| 353 | db 0\r | |
| 354 | dw 0\r | |
| 355 | db 0\r | |
| e598b357 | 356 | inimsg_e:\r |
| a16ba2b0 L |
357 | \r |
| 358 | ;\r | |
| 359 | ;----------------------------------------------------------------------\r | |
| 360 | ;\r | |
| 361 | \r | |
| 362 | sysram_init:\r | |
| 363 | ld hl,sysramw\r | |
| 364 | ld de,topcodsys\r | |
| 365 | ld bc,sysrame-sysramw\r | |
| 366 | ldir\r | |
| 367 | \r | |
| 368 | ret\r | |
| 369 | \r | |
| 370 | ;----------------------------------------------------------------------\r | |
| 371 | \r | |
| 372 | ivtab_init:\r | |
| 373 | ld hl,ivtab ;\r | |
| 374 | ld a,h ;\r | |
| 375 | ld i,a ;\r | |
| 376 | out0 (il),l ;\r | |
| 377 | \r | |
| 378 | ; Let all vectors point to spurious int routines.\r | |
| 379 | \r | |
| 380 | ld d,high sp.int0\r | |
| 381 | ld a,low sp.int0\r | |
| 382 | ld b,9\r | |
| 383 | ivt_i1: \r | |
| 384 | ld (hl),a\r | |
| 385 | inc l\r | |
| 386 | ld (hl),d\r | |
| 387 | inc l\r | |
| 388 | add a,sp.int.len\r | |
| 389 | djnz ivt_i1\r | |
| 390 | ret\r | |
| 391 | \r | |
| 392 | \r | |
| 393 | prt0_init:\r | |
| 394 | ld a,i\r | |
| 395 | ld h,a\r | |
| 396 | in0 a,(il)\r | |
| 397 | and 0E0h\r | |
| 398 | or IV$PRT0\r | |
| 399 | ld l,a\r | |
| 400 | ld (hl),low iprt0\r | |
| 401 | inc hl\r | |
| 402 | ld (hl),high iprt0\r | |
| 403 | ld hl,prt0itab\r | |
| 404 | call io.ini.m\r | |
| 405 | ret\r | |
| 406 | \r | |
| 407 | prt0itab:\r | |
| 408 | db prt0it_e-prt0itab-2\r | |
| 409 | db tmdr0l\r | |
| 410 | dw PRT_TC10MS\r | |
| 411 | dw PRT_TC10MS\r | |
| 412 | db M_TIE0+M_TDE0 ;enable timer 0 interrupt and down count.\r | |
| 413 | prt0it_e:\r | |
| 414 | \r | |
| 415 | ;\r | |
| 416 | ;----------------------------------------------------------------------\r | |
| 417 | ;\r | |
| 418 | \r | |
| 419 | io.ini:\r | |
| 420 | push bc\r | |
| 421 | ld b,0 ;high byte port adress\r | |
| 422 | ld a,(hl) ;count\r | |
| 423 | inc hl\r | |
| 424 | ioi_1:\r | |
| 425 | ld c,(hl) ;port address\r | |
| 426 | inc hl\r | |
| 427 | outi\r | |
| 428 | inc b ;outi decrements b\r | |
| 429 | dec a\r | |
| 430 | jr nz,ioi_1\r | |
| 431 | pop bc\r | |
| 432 | ret\r | |
| 433 | \r | |
| 434 | io.ini.m:\r | |
| 435 | push bc\r | |
| 436 | ld b,(hl)\r | |
| 437 | inc hl\r | |
| 438 | ld c,(hl)\r | |
| 439 | inc hl\r | |
| 440 | otimr \r | |
| 441 | pop bc \r | |
| 442 | ret\r | |
| 443 | \r | |
| 444 | io.ini.l:\r | |
| 445 | ;\r | |
| 446 | \r | |
| 447 | ;----------------------------------------------------------------------\r | |
| 448 | ;\r | |
| 449 | \r | |
| 450 | ; compute crc\r | |
| 451 | ; hl: start adr\r | |
| 452 | ; bc: len\r | |
| 453 | ; bc returns crc val\r | |
| 454 | \r | |
| 455 | do_crc16:\r | |
| 456 | ld de,0FFFFh\r | |
| 457 | crc1:\r | |
| 458 | ld a,(hl)\r | |
| 459 | xor e\r | |
| 460 | ld e,a\r | |
| 461 | rrca\r | |
| 462 | rrca\r | |
| 463 | rrca\r | |
| 464 | rrca\r | |
| 465 | and 0Fh\r | |
| 466 | xor e\r | |
| 467 | ld e,a\r | |
| 468 | rrca\r | |
| 469 | rrca\r | |
| 470 | rrca\r | |
| 471 | push af\r | |
| 472 | and 1Fh\r | |
| 473 | xor d\r | |
| 474 | ld d,a\r | |
| 475 | pop af\r | |
| 476 | push af\r | |
| 477 | rrca\r | |
| 478 | and 0F0h\r | |
| 479 | xor d\r | |
| 480 | ld d,a\r | |
| 481 | pop af\r | |
| 482 | and 0E0h\r | |
| 483 | xor e\r | |
| 484 | ld e,d\r | |
| 485 | ld d,a\r | |
| 486 | cpi\r | |
| 487 | jp pe,crc1\r | |
| 488 | or e ;z-flag\r | |
| 489 | ret\r | |
| 490 | \r | |
| 491 | \r | |
| 492 | gencrc_alv:\r | |
| 493 | push hl ;03f6\r | |
| 494 | push de ;03f7\r | |
| 495 | push bc\r | |
| 496 | push af ;03f8\r | |
| 497 | ld hl,banktabsys ;03f9\r | |
| 498 | ld bc,crc_len ;03fc\r | |
| 499 | call do_crc16 ;03ff\r | |
| 500 | ld (hl),e\r | |
| 501 | inc hl\r | |
| 502 | ld (hl),d\r | |
| 503 | pop af ;0406\r | |
| 504 | pop bc\r | |
| 505 | pop de ;0407\r | |
| 506 | pop hl ;0408\r | |
| 507 | ret ;0409\r | |
| 508 | \r | |
| 509 | checkcrc_alv:\r | |
| 510 | push hl ;040a\r | |
| 511 | push de\r | |
| 512 | push bc ;040b\r | |
| 513 | ld hl,banktabsys ;040d\r | |
| 514 | ld bc,crc_len+2 ;0410\r | |
| 515 | call do_crc16 ;0413\r | |
| 516 | pop bc ;041d\r | |
| 517 | pop de\r | |
| 518 | pop hl ;041e\r | |
| 519 | ret ;041f\r | |
| 520 | \r | |
| 521 | ;\r | |
| 522 | ; alloc\r | |
| 523 | ;\r | |
| 524 | ; h: max bank #\r | |
| 525 | ; l: min bank #\r | |
| 526 | ; b: max size\r | |
| 527 | ; c: min size\r | |
| 528 | ;\r | |
| 529 | ; ret:\r | |
| 530 | ; a: 0 == ok\r | |
| 531 | ; 1 == \r | |
| 532 | ; 2 == no bank # in requested range\r | |
| 533 | ; ff == crc error\r | |
| 534 | ;\r | |
| 535 | \r | |
| 536 | sub_0420h:\r | |
| 537 | call checkcrc_alv ;0420\r | |
| 538 | jr nz,l049ch ;0424 crc error, tables corrupt\r | |
| 539 | \r | |
| 540 | call sub_049dh ;0427 bank # in req. range available?\r | |
| 541 | jr c,l0499h ;042a\r | |
| 542 | push ix ;042c\r | |
| 543 | push iy ;042e\r | |
| 544 | push de ;0430\r | |
| 545 | push hl ;0431\r | |
| 546 | push bc ;0432\r | |
| 547 | ld c,b ;0433\r | |
| 548 | ld b,alv_len+1 ;0434\r | |
| 549 | ld d,0 ;0436\r | |
| 550 | ld hl,memalv-1 ;0438\r | |
| 551 | jr l0441h ;043b\r | |
| 552 | \r | |
| 553 | ; find free blocks\r | |
| 554 | \r | |
| 555 | l043dh:\r | |
| 556 | ld a,(hl) ;043d\r | |
| 557 | inc a ;043e free blocks are marked 0ffh\r | |
| 558 | jr z,l0446h ;043f\r | |
| 559 | l0441h:\r | |
| 560 | inc hl ;0441\r | |
| 561 | djnz l043dh ;0442\r | |
| 562 | jr l0464h ;0444\r | |
| 563 | l0446h:\r | |
| 564 | push hl ;0446 \r | |
| 565 | pop ix ;0447 free blocks start here\r | |
| 566 | ld e,000h ;0449\r | |
| 567 | jr l0451h ;044b\r | |
| 568 | l044dh: ; count free blocks\r | |
| 569 | ld a,(hl) ;044d\r | |
| 570 | inc a ;044e\r | |
| 571 | jr nz,l0457h ;044f\r | |
| 572 | l0451h:\r | |
| 573 | inc e ;0451\r | |
| 574 | inc hl ;0452\r | |
| 575 | djnz l044dh ;0453\r | |
| 576 | jr l0464h ;0455\r | |
| 577 | \r | |
| 578 | ; end of free blocks run. \r | |
| 579 | \r | |
| 580 | l0457h:\r | |
| 581 | ld a,d ;0457\r | |
| 582 | cp e ;0458 nr of blocks >= requested ?\r | |
| 583 | jr nc,l0441h ;0459 \r | |
| 584 | \r | |
| 585 | ld d,e ;045b\r | |
| 586 | push ix ;045c\r | |
| 587 | pop iy ;045e\r | |
| 588 | ld a,d ;0460\r | |
| 589 | cp c ;0461\r | |
| 590 | jr c,l0441h ;0462\r | |
| 591 | l0464h:\r | |
| 592 | pop bc ;0464\r | |
| 593 | ld a,d ;0465\r | |
| 594 | cp b ;0466\r | |
| 595 | jr c,l046ch ;0467\r | |
| 596 | ld d,b ;0469\r | |
| 597 | jr l0471h ;046a\r | |
| 598 | l046ch:\r | |
| 599 | cp c ;046c\r | |
| 600 | jr nc,l0471h ;046d\r | |
| 601 | ld d,000h ;046f\r | |
| 602 | l0471h:\r | |
| 603 | ld a,d ;0471\r | |
| 604 | push iy ;0472\r | |
| 605 | pop hl ;0474\r | |
| 606 | ld de,memalv ;0475\r | |
| 607 | or a ;0478\r | |
| 608 | sbc hl,de ;0479\r | |
| 609 | ld b,l ;047b\r | |
| 610 | ld c,a ;047c\r | |
| 611 | pop hl ;047d\r | |
| 612 | l047eh:\r | |
| 613 | or a ;047e\r | |
| 614 | jr z,l0489h ;047f\r | |
| 615 | ld (iy+0),l ;0481\r | |
| 616 | inc iy ;0484\r | |
| 617 | dec a ;0486\r | |
| 618 | jr l047eh ;0487\r | |
| 619 | l0489h:\r | |
| 620 | pop de ;0489\r | |
| 621 | pop iy ;048a\r | |
| 622 | pop ix ;048c\r | |
| 623 | call gencrc_alv ;048e\r | |
| 624 | ld a,c ;0491\r | |
| 625 | or a ;0492\r | |
| 626 | ld a,000h ;0493\r | |
| 627 | ret nz ;0495\r | |
| 628 | or 001h ;0496\r | |
| 629 | ret ;0498\r | |
| 630 | \r | |
| 631 | l0499h:\r | |
| 632 | ld a,2 ;0499\r | |
| 633 | l049ch:\r | |
| 634 | or a\r | |
| 635 | ret ;049c\r | |
| 636 | \r | |
| 637 | \r | |
| 638 | ; search a free bank number in range\r | |
| 639 | ; h: max #\r | |
| 640 | ; l: min #\r | |
| 641 | ; ret:\r | |
| 642 | ; l: bank number available\r | |
| 643 | ; nc, if found, bank nr. in l\r | |
| 644 | ; cy, if none found\r | |
| 645 | \r | |
| 646 | sub_049dh:\r | |
| 647 | push de ;049d\r | |
| 648 | push bc ;049e\r | |
| 649 | ex de,hl ;049f\r | |
| 650 | dec e ;04a0\r | |
| 651 | l04a1h:\r | |
| 652 | inc e ;04a1 test next #\r | |
| 653 | ld a,d ;04a2\r | |
| 654 | cp e ;04a3\r | |
| 655 | jr c,l04b1h ;04a4 \r | |
| 656 | ld a,e ;04a6\r | |
| 657 | ld hl,memalv ;04a7\r | |
| 658 | ld bc,alv_len ;04aa\r | |
| 659 | cpir ;04ad bank# allready allocated?\r | |
| 660 | jr z,l04a1h ;04af if yes, search for next\r | |
| 661 | l04b1h:\r | |
| 662 | ex de,hl ;04b1\r | |
| 663 | pop bc ;04b2\r | |
| 664 | pop de ;04b3\r | |
| 665 | ret ;04b4\r | |
| 666 | \r | |
| 667 | \r | |
| 668 | sub_04b5h:\r | |
| 669 | ld a,l ;04b5\r | |
| 670 | cp 012h ;04b6\r | |
| 671 | ccf ;04b8\r | |
| 672 | ret c ;04b9\r | |
| 673 | push hl ;04ba\r | |
| 674 | ld hl,banktab ;04bb\r | |
| 675 | call add_hl_a\r | |
| 676 | ld (hl),b ;04c3\r | |
| 677 | call gencrc_alv ;04c4\r | |
| 678 | pop hl ;04c7\r | |
| 679 | or a ;04c8 clear carry\r | |
| 680 | ret ;04c9\r | |
| 681 | \r | |
| 682 | \r | |
| 683 | ;--------------------------------------------------------------\r | |
| 684 | ;\r | |
| 685 | ; de: Log. Address\r | |
| 686 | ; a: Bank number\r | |
| 687 | ;\r | |
| 688 | ;out ahl: Phys. (linear) Address\r | |
| 689 | \r | |
| 690 | \r | |
| 691 | bnk2phys:\r | |
| 692 | push hl\r | |
| 693 | ld hl,banktab\r | |
| 694 | call add_hl_a\r | |
| 695 | ld a,(hl)\r | |
| 696 | pop hl\r | |
| 697 | \r | |
| 698 | ; fall thru\r | |
| 699 | ;--------------------------------------------------------------\r | |
| 700 | ;\r | |
| 701 | ; de: Log. Address\r | |
| 702 | ; a: Bank (bbr)\r | |
| 703 | ;\r | |
| 704 | ; OP: ahl = (a<<12) + (d<<8) + e\r | |
| 705 | ;\r | |
| 706 | ;out ehl: Phys. (linear) Address\r | |
| 707 | \r | |
| 708 | \r | |
| 709 | log2phys:\r | |
| 710 | push bc ;\r | |
| 711 | ld c,a ;\r | |
| 712 | ld b,16 ;\r | |
| 713 | mlt bc ;bc = a<<4\r | |
| 714 | ld l,d ;\r | |
| 715 | ld h,0 ;\r | |
| 716 | add hl,bc ;bc + d == a<<4 + d \r | |
| 717 | ld a,h ;\r | |
| 718 | ld h,l ;\r | |
| 719 | ld l,e ;\r | |
| 720 | pop bc ;\r | |
| 721 | ret ;\r | |
| 722 | \r | |
| 723 | \r | |
| 724 | ;--------------------------------------------------------------\r | |
| 725 | ;\r | |
| 726 | ;return:\r | |
| 727 | ; hl = hl + a\r | |
| 728 | ; Flags undefined\r | |
| 729 | ;\r | |
| 730 | \r | |
| 731 | add_hl_a:\r | |
| 732 | add a,l \r | |
| 733 | ld l,a \r | |
| 734 | ret nc \r | |
| 735 | inc h \r | |
| 736 | ret \r | |
| 737 | \r | |
| 738 | ; ---------------------------------------------------------\r | |
| 739 | \r | |
| 740 | sysramw:\r | |
| 741 | \r | |
| 742 | .phase isvsw_loc\r | |
| 743 | topcodsys:\r | |
| 744 | \r | |
| 745 | ; Trampoline for interrupt routines in banked ram.\r | |
| 746 | ; Switch stack pointer to "system" stack in top ram\r | |
| 747 | ; Save cbar\r | |
| 748 | \r | |
| 749 | isv_sw: ;\r | |
| 750 | ex (sp),hl ; save hl, return adr in hl\r | |
| 751 | push de ;\r | |
| 752 | push af ;\r | |
| 753 | ex de,hl ;\r | |
| 754 | ld hl,0 ;\r | |
| 755 | add hl,sp ;\r | |
| 756 | ld a,h ;\r | |
| 757 | cp 0f8h ;\r | |
| 758 | jr nc,isw_1 ;\r | |
| 759 | ld sp,$stack ;\r | |
| 760 | isw_1:\r | |
| 761 | push hl ;\r | |
| 762 | in0 h,(cbar) ;\r | |
| 763 | push hl ;\r | |
| 764 | ld a,SYS$CBAR ;\r | |
| 765 | out0 (cbar),a ;\r | |
| 766 | ex de,hl ;\r | |
| 767 | ld e,(hl) ;\r | |
| 768 | inc hl ;\r | |
| 769 | ld d,(hl) ;\r | |
| 770 | ex de,hl ;\r | |
| 771 | push bc ;\r | |
| 772 | call jphl ;\r | |
| 773 | \r | |
| 774 | pop bc ;\r | |
| 775 | pop hl ;\r | |
| 776 | out0 (cbar),h ;\r | |
| 777 | pop hl ;\r | |
| 778 | ld sp,hl ;\r | |
| 779 | pop af ;\r | |
| 780 | pop de ;\r | |
| 781 | pop hl ;\r | |
| 782 | ei ;\r | |
| 783 | ret ;\r | |
| 784 | jphl:\r | |
| 785 | jp (hl) ;\r | |
| 786 | \r | |
| 787 | ; ---------------------------------------------------------\r | |
| 788 | \r | |
| 789 | iprt0:\r | |
| 790 | push af\r | |
| 791 | push hl\r | |
| 792 | in0 a,(tcr)\r | |
| 793 | in0 a,(tmdr0l)\r | |
| 794 | in0 a,(tmdr0h)\r | |
| 795 | ld a,(tim_ms)\r | |
| 796 | inc a\r | |
| 797 | cp 100\r | |
| 798 | jr nz,iprt_1\r | |
| 799 | xor a\r | |
| 800 | ld hl,(tim_s)\r | |
| 801 | inc hl\r | |
| 802 | ld (tim_s),hl\r | |
| 803 | iprt_1:\r | |
| 804 | ld (tim_ms),a\r | |
| 805 | pop hl\r | |
| 806 | pop af\r | |
| 807 | ei\r | |
| 808 | ret\r | |
| 809 | \r | |
| 810 | ; ---------------------------------------------------------\r | |
| 811 | \r | |
| 812 | sp.int0:\r | |
| 813 | ld a,0d0h\r | |
| 814 | jr sp.i.1\r | |
| 815 | sp.int.len equ $-sp.int0\r | |
| 816 | ld a,0d1h\r | |
| 817 | jr sp.i.1\r | |
| 818 | ld a,0d2h\r | |
| 819 | jr sp.i.1\r | |
| 820 | ld a,0d3h\r | |
| 821 | jr sp.i.1\r | |
| 822 | ld a,0d4h\r | |
| 823 | jr sp.i.1\r | |
| 824 | ld a,0d5h\r | |
| 825 | jr sp.i.1\r | |
| 826 | ld a,0d6h\r | |
| 827 | jr sp.i.1\r | |
| 828 | ld a,0d7h\r | |
| 829 | jr sp.i.1\r | |
| 830 | ld a,0d8h\r | |
| 831 | sp.i.1:\r | |
| 832 | ; out (80h),a\r | |
| 833 | halt\r | |
| 834 | \r | |
| 835 | curph defl $\r | |
| 836 | .dephase\r | |
| 837 | sysrame:\r | |
| 838 | .phase curph\r | |
| 839 | tim_ms: db 0\r | |
| 840 | tim_s: dw 0\r | |
| 841 | .dephase\r | |
| 842 | \r | |
| 843 | ;-----------------------------------------------------\r | |
| 844 | \r | |
| 845 | dseg\r | |
| 846 | \r | |
| 847 | ds 1\r | |
| 848 | banktabsys:\r | |
| 849 | ds 1 ;0c001h\r | |
| 850 | ds 1 ;0c002h\r | |
| 851 | banktab:\r | |
| 852 | ds BANKS ;0c003h\r | |
| 853 | memalv:\r | |
| 854 | ds 512/4 ;Number of 4k blocks\r | |
| 855 | alv_len equ $-memalv\r | |
| 856 | crc_len equ $-banktabsys\r | |
| 857 | \r | |
| 858 | crc_memalv: \r | |
| 859 | ds 2 ;\r | |
| 860 | \r | |
| 861 | cseg\r | |
| 862 | \r | |
| 863 | ;.phase 0ffc0h\r | |
| 864 | ;ivtab equ 0ffc0h ; 0ffc0h ;int vector table\r | |
| 865 | ;.dephase\r | |
| 866 | \r | |
| 867 | ;.phase 0fffch\r | |
| 868 | mark_55AA equ 0fffch\r | |
| 869 | ;ds 4 ; 0fffch\r | |
| 870 | ;.dephase\r | |
| 871 | \r | |
| 872 | \r | |
| 873 | end\r | |
| 874 | \r |