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Commit | Line | Data |
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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 | |
815c1735 | 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 | |
815c1735 | 25 | jp start\r |
a16ba2b0 L |
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 | |
349c01b1 | 35 | db 0, 0, 0, 0, 0\r |
a16ba2b0 L |
36 | \r |
37 | ;----------------------------------------------------------------------\r | |
349c01b1 L |
38 | \r |
39 | ;org 40h\r | |
40 | \r | |
41 | dw 0\r | |
42 | db 0\r | |
43 | \r | |
a16ba2b0 L |
44 | \r |
45 | if ROMSYS\r | |
46 | $crom: defb c$rom ;\r | |
47 | else\r | |
48 | db 0 ;\r | |
49 | endif\r | |
50 | \r | |
51 | dmclrt: ;clear ram per dma\r | |
52 | db dmct_e-dmclrt-2 ;\r | |
53 | db sar0l ;first port\r | |
815c1735 | 54 | dw nullbyte ;src (fixed)\r |
a16ba2b0 L |
55 | nullbyte:\r |
56 | db 000h ;src\r | |
57 | dw romend ;dst (inc), start after "rom" code\r | |
58 | db 00h ;dst\r | |
59 | dw 0-romend ;count (64k)\r | |
60 | dmct_e:\r | |
61 | \r | |
a16ba2b0 L |
62 | INIWAITS defl CWAITIO\r |
63 | if ROMSYS\r | |
64 | INIWAITS defl INIWAITS+CWAITROM\r | |
65 | endif\r | |
66 | \r | |
67 | hwini0:\r | |
68 | db 3 ;count\r | |
69 | db rcr,CREFSH ;configure DRAM refresh\r | |
70 | db dcntl,INIWAITS ;wait states\r | |
71 | db cbar,SYS$CBAR\r | |
72 | \r | |
73 | ;----------------------------------------------------------------------\r | |
74 | \r | |
75 | start:\r | |
76 | push af ;003c\r | |
77 | in0 a,(itc) ;003d Illegal opcode trap?\r | |
78 | jp p,??st01 ;0040\r | |
79 | pop af ;0043\r | |
80 | jp bpent ;0044 yes, handle\r | |
81 | \r | |
82 | ??st01:\r | |
815c1735 | 83 | ld a,i ;0047 I register == 0 ?\r |
a16ba2b0 | 84 | jr z,??st02 ;004b yes, harware reset\r |
815c1735 | 85 | pop af ;004d\r |
a16ba2b0 L |
86 | jp bpent ;004e no, allready set up\r |
87 | \r | |
88 | ??st02:\r | |
89 | di ;0058\r | |
90 | ld a,CREFSH\r | |
91 | out0 (rcr),a ; configure DRAM refresh\r | |
92 | ld a,CWAITIO\r | |
93 | out0 (dcntl),a ; wait states\r | |
94 | \r | |
815c1735 L |
95 | ld a,M_NCD ;No Clock Divide\r |
96 | out0 (ccr),a\r | |
bad2d92d L |
97 | ; ld a,M_X2CM ;X2 Clock Multiplier\r |
98 | ; out0 (cmr),a\r | |
815c1735 | 99 | \r |
a16ba2b0 L |
100 | ; search warm start mark\r |
101 | \r | |
102 | ld ix,mark_55AA ;00b8 ; top of common area\r | |
103 | ld a,SYS$CBAR ;\r | |
104 | out0 (cbar),a ;\r | |
105 | ld a,071h ;00bc\r | |
106 | ex af,af' ;00be ;for cbr = 0x70 downto 0x40\r | |
107 | swsm_l:\r | |
815c1735 | 108 | ex af,af' ;00bf\r |
a16ba2b0 L |
109 | dec a ;00c0\r |
110 | cp 03fh ;00c1\r | |
111 | jr z,kstart ;00c3 ; break (mark not found)\r | |
112 | out0 (cbr),a ;00c5\r | |
113 | ex af,af' ;00c8\r | |
114 | ld a,0aah ;00c9\r | |
115 | cp (ix+000h) ;00cb\r | |
116 | jr nz,swsm_l ;00ce\r | |
117 | cp (ix+002h) ;00d0\r | |
118 | jr nz,swsm_l ;00d3\r | |
119 | cpl ;00d5\r | |
120 | cp (ix+001h) ;00d6\r | |
121 | jr nz,swsm_l ;00d9\r | |
122 | cp (ix+003h) ;00db\r | |
123 | jr nz,swsm_l ;00de\r | |
124 | ld sp,$stack ;00e0 mark found, check\r | |
125 | call checkcrc_alv ;00e3\r | |
126 | jp z,wstart ;00e6 check ok,\r | |
127 | \r | |
128 | ;\r | |
129 | ; ram not ok, initialize -- kstart --\r | |
130 | \r | |
131 | kstart:\r | |
132 | \r | |
133 | ld a,088h ;00e9 0000-7fff: common 0\r | |
134 | out0 (cbar),a ;00eb 8000-ffff: common 1\r | |
135 | ld ix,08000h ;00f3\r | |
136 | ld a,0 ;00f1 start at 008000 (2. phys. 32k block)\r | |
137 | ??f_0:\r | |
138 | out0 (cbr),a ;00f9\r | |
139 | \r | |
815c1735 | 140 | ld (ix+0),a ;0103\r |
a16ba2b0 | 141 | cpl\r |
815c1735 | 142 | ld (ix+1),a ;0103\r |
a16ba2b0 L |
143 | cpl\r |
144 | add a,8 ;010a next 'bank'\r | |
145 | cp 078h ;010c stop at 078000\r | |
146 | jr nz,??f_0 ;010e\r | |
147 | \r | |
148 | ld de,8000h ;0114 first block not tested, but mark as ok\r | |
149 | ld a,0 ;00f1 start at 008000 (2. phys. 32k block)\r | |
150 | ??cp_0:\r | |
151 | out0 (cbr),a ;011c\r | |
152 | ld c,a\r | |
153 | xor (ix+0)\r | |
154 | ld b,a\r | |
155 | ld a,c\r | |
156 | cpl\r | |
157 | xor (ix+1)\r | |
158 | or b\r | |
159 | jr nz,??cp_1\r | |
160 | scf\r | |
161 | ??cp_1:\r | |
162 | rr d\r | |
163 | rr e\r | |
164 | ld a,c\r | |
165 | add a,8\r | |
166 | cp 078h ; stop at 078000\r | |
167 | jr nz,??cp_0\r | |
815c1735 | 168 | \r |
a16ba2b0 L |
169 | ;\r |
170 | ; ram test found 1 or more error free blocks (32k)\r | |
171 | ;\r | |
172 | \r | |
173 | ramok:\r | |
174 | ld a,SYS$CBAR ;01c8\r | |
175 | out0 (cbar),a ;01ca\r | |
176 | ld h,d\r | |
177 | ld l,e\r | |
178 | ld c,070h ;01ce highest block\r | |
179 | ld b,15 ;01d0\r | |
180 | ??sr_1:\r | |
181 | add hl,hl\r | |
182 | jr c,alloc ;01d4 highest "error free" block\r | |
183 | ld a,c ;01d6\r | |
184 | sub 008h ;01d7\r | |
185 | ld c,a ;01d9\r | |
186 | djnz ??sr_1 ;01da\r | |
187 | \r | |
188 | slp ;01dc should never be reached\r | |
189 | \r | |
190 | alloc:\r | |
191 | out0 (cbr),c ;01de\r | |
192 | ld sp,$stack ;01e1\r | |
815c1735 | 193 | \r |
a16ba2b0 L |
194 | ; Clear RAM using DMA0\r |
195 | \r | |
196 | ld hl,dmclrt ;load DMA registers\r | |
197 | call io.ini.m\r | |
198 | ld a,0cbh ;01ef dst +1, src fixed, burst\r | |
199 | out0 (dmode),a ;01f1\r | |
200 | \r | |
201 | ld b,512/64\r | |
815c1735 | 202 | ld a,062h ;01f4 enable dma0,\r |
a16ba2b0 L |
203 | ??cl_1:\r |
204 | out0 (dstat),a ;01f9 clear (up to) 64k\r | |
205 | djnz ??cl_1 ; end of RAM?\r | |
815c1735 | 206 | \r |
a16ba2b0 | 207 | ; Init bank manager\r |
815c1735 | 208 | \r |
a16ba2b0 L |
209 | ld hl,banktabsys ;020f\r |
210 | ld (hl),c ; Common area\r | |
211 | inc hl ;0213\r | |
212 | ld (hl),c ; System work area\r | |
213 | inc hl ;0215 Point to bank 0 entry\r | |
214 | ld b,BANKS ;0216\r | |
215 | l0218h:\r | |
216 | ld (hl),0ffh ;0218 Mark all banks as unassigned\r | |
217 | inc hl ;021a\r | |
218 | djnz l0218h ;021b\r | |
219 | \r | |
220 | ld hl,memalv ;\r | |
221 | ld b,8 ; 8*4k ie. first 32k\r | |
222 | ??a_0:\r | |
223 | ld (hl),0e0h ; mark as sys ("rom"/monitor)\r | |
224 | inc hl\r | |
225 | djnz ??a_0\r | |
815c1735 | 226 | \r |
a16ba2b0 L |
227 | rr d ; shift out bit for block 0\r |
228 | rr e ;\r | |
229 | ld c,15 ;022c 15*32k remaining blocks\r | |
230 | l022eh:\r | |
231 | ld a,0feh ; 0xfe == block with error(s)\r | |
232 | rr d ;\r | |
233 | rr e\r | |
234 | adc a,0 ; ==> 0xff : block ok\r | |
815c1735 | 235 | ld b,32/4 ; 32k == 8 * 4k\r |
a16ba2b0 L |
236 | l0236h:\r |
237 | ld (hl),a ;\r | |
238 | inc hl ;\r | |
239 | djnz l0236h ;\r | |
240 | dec c ;\r | |
241 | jr nz,l022eh ;next 32k block\r | |
815c1735 | 242 | \r |
a16ba2b0 L |
243 | ld hl,memalv+0ch ;memalv+0ch\r |
244 | ld a,(banktabsys) ;\r | |
245 | call add_hl_a\r | |
246 | ld b,3 ;\r | |
247 | l024ah:\r | |
248 | ld (hl),0ech ;alloc system ram\r | |
249 | inc hl ;\r | |
250 | djnz l024ah ;\r | |
251 | ld (hl),0efh ;alloc common\r | |
252 | call gencrc_alv\r | |
253 | \r | |
815c1735 | 254 | ld hl,0000h ;bank #\r |
a16ba2b0 L |
255 | ld bc,0f0fh ; size (?) (4k blocks)\r |
256 | xor a ;\r | |
257 | call sub_0420h ;alloc mem for bank 0\r | |
258 | ld c,l ;\r | |
259 | or a ;\r | |
260 | call z,sub_04b5h ;\r | |
261 | \r | |
262 | ld hl,0101h ;\r | |
263 | ld bc,0f0fh ;\r | |
264 | xor a ;\r | |
265 | call sub_0420h ;\r | |
266 | ld c,l ;\r | |
267 | or a ;\r | |
268 | call z,sub_04b5h ;\r | |
269 | \r | |
270 | ld hl,055AAh ;set warm start mark\r | |
271 | ld (mark_55AA),hl ;\r | |
272 | ld (mark_55AA+2),hl;\r | |
273 | \r | |
274 | ;\r | |
275 | ; crc ok -- wstart --\r | |
276 | ;\r | |
277 | wstart:\r | |
278 | call sysram_init ;027f\r | |
279 | call ivtab_init\r | |
280 | \r | |
281 | call prt0_init\r | |
282 | \r | |
a16ba2b0 L |
283 | call $coninit\r |
284 | \r | |
bad2d92d | 285 | call bufferinit\r |
a16ba2b0 L |
286 | \r |
287 | \r | |
288 | \r | |
289 | im 2 ;?030e\r | |
290 | ei ;0282\r | |
291 | \r | |
292 | call $cists ;0284\r | |
293 | call $cists ;0287\r | |
294 | or a ;028a\r | |
295 | call nz,$ci ;028d\r | |
815c1735 L |
296 | \r |
297 | ld a,(banktab) ;\r | |
298 | ld e,a ;\r | |
a16ba2b0 | 299 | jp ddtz ;0290\r |
815c1735 | 300 | \r |
a16ba2b0 L |
301 | ;\r |
302 | ;----------------------------------------------------------------------\r | |
303 | ;\r | |
304 | \r | |
a16ba2b0 L |
305 | ;TODO: Make a ringbuffer module.\r |
306 | \r | |
307 | global buf.init\r | |
815c1735 | 308 | \r |
a16ba2b0 L |
309 | buf.init:\r |
310 | ld (ix+o.in_idx),0\r | |
311 | ld (ix+o.out_idx),0\r | |
312 | ld (ix+o.mask),a\r | |
313 | ret\r | |
314 | \r | |
315 | ;----------------------------------------------------------------------\r | |
6a4e9540 | 316 | if 0\r |
bad2d92d L |
317 | extrn msginit,msg_tx_fifo,msg_rx_fifo\r |
318 | extrn msg.sout\r | |
349c01b1 L |
319 | \r |
320 | bufferinit:\r | |
349c01b1 | 321 | \r |
bad2d92d | 322 | ld de,msg_tx_fifo\r |
349c01b1 L |
323 | in0 a,cbr\r |
324 | call log2phys\r | |
325 | ld (40h+0),hl\r | |
326 | ld (40h+2),a\r | |
bad2d92d | 327 | \r |
6a4e9540 L |
328 | ; ld (bufdat+1),hl\r |
329 | ; ld (bufdat+3),a\r | |
330 | ; ld a,1\r | |
331 | ; ld (bufdat+0),a\r | |
332 | ; ld hl,inimsg\r | |
333 | ; call msg.sout\r | |
349c01b1 | 334 | \r |
bad2d92d L |
335 | ld de,msg_rx_fifo\r |
336 | in0 a,cbr\r | |
337 | call log2phys\r | |
338 | ld (bufdat+1),hl\r | |
339 | ld (bufdat+3),a\r | |
6a4e9540 | 340 | ld a,2\r |
bad2d92d L |
341 | ld (bufdat+0),a\r |
342 | ld hl,inimsg\r | |
343 | call msg.sout\r | |
349c01b1 | 344 | \r |
bad2d92d | 345 | ret\r |
a16ba2b0 | 346 | \r |
349c01b1 | 347 | inimsg:\r |
bad2d92d | 348 | db inimsg_e - $ - 1\r |
349c01b1 | 349 | db 81h\r |
bad2d92d | 350 | db inimsg_e - $ - 1\r |
349c01b1 L |
351 | db 0\r |
352 | bufdat:\r | |
353 | db 0\r | |
354 | dw 0\r | |
355 | db 0\r | |
356 | inimsg_e:\r | |
bad2d92d | 357 | \r |
6a4e9540 | 358 | endif\r |
349c01b1 L |
359 | ;----------------------------------------------------------------------\r |
360 | ;\r | |
4caee1ec | 361 | \r |
6a4e9540 L |
362 | extrn msginit,msg.sout\r |
363 | extrn mtx.fifo,mrx.fifo\r | |
364 | extrn co.fifo,ci.fifo\r | |
4caee1ec L |
365 | \r |
366 | \r | |
a16ba2b0 L |
367 | bufferinit:\r |
368 | call msginit\r | |
815c1735 | 369 | \r |
a16ba2b0 | 370 | ld hl,buffers\r |
6a4e9540 | 371 | ld b,buftablen\r |
a16ba2b0 | 372 | bfi_1:\r |
6a4e9540 L |
373 | ld a,(hl)\r |
374 | inc hl\r | |
375 | ld (bufdat+0),a\r | |
a16ba2b0 L |
376 | ld e,(hl)\r |
377 | inc hl\r | |
378 | ld d,(hl)\r | |
379 | inc hl\r | |
380 | push hl\r | |
6a4e9540 L |
381 | \r |
382 | or a\r | |
383 | jr nz,bfi_2\r | |
384 | in0 a,cbr\r | |
385 | call log2phys\r | |
386 | ld (40h+0),hl\r | |
387 | ld (40h+2),a\r | |
388 | out0 (AVRINT5),a\r | |
389 | jr bfi_3 \r | |
390 | bfi_2:\r | |
a16ba2b0 L |
391 | in0 a,cbr\r |
392 | call log2phys\r | |
393 | ld (bufdat+1),hl\r | |
394 | ld (bufdat+3),a\r | |
a16ba2b0 L |
395 | ld hl,inimsg\r |
396 | call msg.sout\r | |
6a4e9540 | 397 | bfi_3:\r |
a16ba2b0 | 398 | pop hl\r |
a16ba2b0 L |
399 | djnz bfi_1\r |
400 | ret\r | |
401 | \r | |
a16ba2b0 | 402 | buffers:\r |
6a4e9540 L |
403 | db 0\r |
404 | dw mtx.fifo\r | |
405 | db 1\r | |
406 | dw mrx.fifo\r | |
407 | db 2\r | |
408 | dw co.fifo\r | |
409 | db 3\r | |
410 | dw ci.fifo\r | |
411 | buftablen equ ($ - buffers)/3\r | |
815c1735 L |
412 | \r |
413 | inimsg:\r | |
6a4e9540 | 414 | db inimsg_e - $ -1\r |
a16ba2b0 L |
415 | db 81h\r |
416 | db inimsg_e - $ -1\r | |
417 | db 0\r | |
418 | bufdat:\r | |
419 | db 0\r | |
420 | dw 0\r | |
421 | db 0\r | |
e598b357 | 422 | inimsg_e:\r |
a16ba2b0 | 423 | \r |
4caee1ec | 424 | \r |
a16ba2b0 L |
425 | ;\r |
426 | ;----------------------------------------------------------------------\r | |
427 | ;\r | |
428 | \r | |
429 | sysram_init:\r | |
430 | ld hl,sysramw\r | |
431 | ld de,topcodsys\r | |
432 | ld bc,sysrame-sysramw\r | |
433 | ldir\r | |
434 | \r | |
435 | ret\r | |
436 | \r | |
437 | ;----------------------------------------------------------------------\r | |
438 | \r | |
439 | ivtab_init:\r | |
440 | ld hl,ivtab ;\r | |
441 | ld a,h ;\r | |
442 | ld i,a ;\r | |
443 | out0 (il),l ;\r | |
444 | \r | |
445 | ; Let all vectors point to spurious int routines.\r | |
446 | \r | |
447 | ld d,high sp.int0\r | |
448 | ld a,low sp.int0\r | |
449 | ld b,9\r | |
815c1735 | 450 | ivt_i1:\r |
a16ba2b0 L |
451 | ld (hl),a\r |
452 | inc l\r | |
453 | ld (hl),d\r | |
454 | inc l\r | |
455 | add a,sp.int.len\r | |
456 | djnz ivt_i1\r | |
457 | ret\r | |
458 | \r | |
4caee1ec | 459 | ;----------------------------------------------------------------------\r |
a16ba2b0 L |
460 | \r |
461 | prt0_init:\r | |
462 | ld a,i\r | |
463 | ld h,a\r | |
464 | in0 a,(il)\r | |
465 | and 0E0h\r | |
466 | or IV$PRT0\r | |
467 | ld l,a\r | |
468 | ld (hl),low iprt0\r | |
469 | inc hl\r | |
470 | ld (hl),high iprt0\r | |
471 | ld hl,prt0itab\r | |
472 | call io.ini.m\r | |
473 | ret\r | |
815c1735 | 474 | \r |
a16ba2b0 L |
475 | prt0itab:\r |
476 | db prt0it_e-prt0itab-2\r | |
477 | db tmdr0l\r | |
478 | dw PRT_TC10MS\r | |
479 | dw PRT_TC10MS\r | |
480 | db M_TIE0+M_TDE0 ;enable timer 0 interrupt and down count.\r | |
481 | prt0it_e:\r | |
482 | \r | |
4caee1ec | 483 | \r |
a16ba2b0 L |
484 | ;\r |
485 | ;----------------------------------------------------------------------\r | |
486 | ;\r | |
487 | \r | |
488 | io.ini:\r | |
489 | push bc\r | |
490 | ld b,0 ;high byte port adress\r | |
491 | ld a,(hl) ;count\r | |
492 | inc hl\r | |
493 | ioi_1:\r | |
494 | ld c,(hl) ;port address\r | |
495 | inc hl\r | |
496 | outi\r | |
497 | inc b ;outi decrements b\r | |
498 | dec a\r | |
499 | jr nz,ioi_1\r | |
500 | pop bc\r | |
501 | ret\r | |
502 | \r | |
503 | io.ini.m:\r | |
504 | push bc\r | |
505 | ld b,(hl)\r | |
506 | inc hl\r | |
507 | ld c,(hl)\r | |
508 | inc hl\r | |
815c1735 L |
509 | otimr\r |
510 | pop bc\r | |
a16ba2b0 | 511 | ret\r |
815c1735 | 512 | \r |
a16ba2b0 L |
513 | io.ini.l:\r |
514 | ;\r | |
515 | \r | |
516 | ;----------------------------------------------------------------------\r | |
517 | ;\r | |
518 | \r | |
519 | ; compute crc\r | |
520 | ; hl: start adr\r | |
521 | ; bc: len\r | |
522 | ; bc returns crc val\r | |
523 | \r | |
524 | do_crc16:\r | |
525 | ld de,0FFFFh\r | |
526 | crc1:\r | |
527 | ld a,(hl)\r | |
528 | xor e\r | |
529 | ld e,a\r | |
530 | rrca\r | |
531 | rrca\r | |
532 | rrca\r | |
533 | rrca\r | |
534 | and 0Fh\r | |
535 | xor e\r | |
536 | ld e,a\r | |
537 | rrca\r | |
538 | rrca\r | |
539 | rrca\r | |
540 | push af\r | |
541 | and 1Fh\r | |
542 | xor d\r | |
543 | ld d,a\r | |
544 | pop af\r | |
545 | push af\r | |
546 | rrca\r | |
547 | and 0F0h\r | |
548 | xor d\r | |
549 | ld d,a\r | |
550 | pop af\r | |
551 | and 0E0h\r | |
552 | xor e\r | |
553 | ld e,d\r | |
554 | ld d,a\r | |
555 | cpi\r | |
556 | jp pe,crc1\r | |
557 | or e ;z-flag\r | |
558 | ret\r | |
559 | \r | |
560 | \r | |
561 | gencrc_alv:\r | |
562 | push hl ;03f6\r | |
563 | push de ;03f7\r | |
564 | push bc\r | |
565 | push af ;03f8\r | |
566 | ld hl,banktabsys ;03f9\r | |
567 | ld bc,crc_len ;03fc\r | |
568 | call do_crc16 ;03ff\r | |
569 | ld (hl),e\r | |
570 | inc hl\r | |
571 | ld (hl),d\r | |
572 | pop af ;0406\r | |
573 | pop bc\r | |
574 | pop de ;0407\r | |
575 | pop hl ;0408\r | |
576 | ret ;0409\r | |
577 | \r | |
578 | checkcrc_alv:\r | |
579 | push hl ;040a\r | |
580 | push de\r | |
581 | push bc ;040b\r | |
582 | ld hl,banktabsys ;040d\r | |
583 | ld bc,crc_len+2 ;0410\r | |
584 | call do_crc16 ;0413\r | |
585 | pop bc ;041d\r | |
586 | pop de\r | |
587 | pop hl ;041e\r | |
588 | ret ;041f\r | |
589 | \r | |
4caee1ec L |
590 | ;----------------------------------------------------------------------\r |
591 | \r | |
a16ba2b0 L |
592 | ;\r |
593 | ; alloc\r | |
594 | ;\r | |
595 | ; h: max bank #\r | |
596 | ; l: min bank #\r | |
597 | ; b: max size\r | |
598 | ; c: min size\r | |
599 | ;\r | |
600 | ; ret:\r | |
601 | ; a: 0 == ok\r | |
815c1735 | 602 | ; 1 ==\r |
a16ba2b0 L |
603 | ; 2 == no bank # in requested range\r |
604 | ; ff == crc error\r | |
605 | ;\r | |
606 | \r | |
607 | sub_0420h:\r | |
608 | call checkcrc_alv ;0420\r | |
609 | jr nz,l049ch ;0424 crc error, tables corrupt\r | |
815c1735 | 610 | \r |
a16ba2b0 L |
611 | call sub_049dh ;0427 bank # in req. range available?\r |
612 | jr c,l0499h ;042a\r | |
613 | push ix ;042c\r | |
614 | push iy ;042e\r | |
615 | push de ;0430\r | |
616 | push hl ;0431\r | |
617 | push bc ;0432\r | |
618 | ld c,b ;0433\r | |
619 | ld b,alv_len+1 ;0434\r | |
620 | ld d,0 ;0436\r | |
621 | ld hl,memalv-1 ;0438\r | |
622 | jr l0441h ;043b\r | |
623 | \r | |
624 | ; find free blocks\r | |
625 | \r | |
626 | l043dh:\r | |
627 | ld a,(hl) ;043d\r | |
628 | inc a ;043e free blocks are marked 0ffh\r | |
629 | jr z,l0446h ;043f\r | |
630 | l0441h:\r | |
631 | inc hl ;0441\r | |
632 | djnz l043dh ;0442\r | |
633 | jr l0464h ;0444\r | |
634 | l0446h:\r | |
815c1735 | 635 | push hl ;0446\r |
a16ba2b0 L |
636 | pop ix ;0447 free blocks start here\r |
637 | ld e,000h ;0449\r | |
638 | jr l0451h ;044b\r | |
639 | l044dh: ; count free blocks\r | |
640 | ld a,(hl) ;044d\r | |
641 | inc a ;044e\r | |
642 | jr nz,l0457h ;044f\r | |
643 | l0451h:\r | |
644 | inc e ;0451\r | |
645 | inc hl ;0452\r | |
646 | djnz l044dh ;0453\r | |
647 | jr l0464h ;0455\r | |
648 | \r | |
815c1735 | 649 | ; end of free blocks run.\r |
a16ba2b0 L |
650 | \r |
651 | l0457h:\r | |
652 | ld a,d ;0457\r | |
653 | cp e ;0458 nr of blocks >= requested ?\r | |
815c1735 | 654 | jr nc,l0441h ;0459\r |
a16ba2b0 L |
655 | \r |
656 | ld d,e ;045b\r | |
657 | push ix ;045c\r | |
658 | pop iy ;045e\r | |
659 | ld a,d ;0460\r | |
660 | cp c ;0461\r | |
661 | jr c,l0441h ;0462\r | |
662 | l0464h:\r | |
663 | pop bc ;0464\r | |
664 | ld a,d ;0465\r | |
665 | cp b ;0466\r | |
666 | jr c,l046ch ;0467\r | |
667 | ld d,b ;0469\r | |
668 | jr l0471h ;046a\r | |
669 | l046ch:\r | |
670 | cp c ;046c\r | |
671 | jr nc,l0471h ;046d\r | |
672 | ld d,000h ;046f\r | |
673 | l0471h:\r | |
674 | ld a,d ;0471\r | |
675 | push iy ;0472\r | |
676 | pop hl ;0474\r | |
677 | ld de,memalv ;0475\r | |
678 | or a ;0478\r | |
679 | sbc hl,de ;0479\r | |
680 | ld b,l ;047b\r | |
681 | ld c,a ;047c\r | |
682 | pop hl ;047d\r | |
683 | l047eh:\r | |
684 | or a ;047e\r | |
685 | jr z,l0489h ;047f\r | |
686 | ld (iy+0),l ;0481\r | |
687 | inc iy ;0484\r | |
688 | dec a ;0486\r | |
689 | jr l047eh ;0487\r | |
690 | l0489h:\r | |
691 | pop de ;0489\r | |
692 | pop iy ;048a\r | |
693 | pop ix ;048c\r | |
694 | call gencrc_alv ;048e\r | |
695 | ld a,c ;0491\r | |
696 | or a ;0492\r | |
697 | ld a,000h ;0493\r | |
698 | ret nz ;0495\r | |
699 | or 001h ;0496\r | |
700 | ret ;0498\r | |
701 | \r | |
702 | l0499h:\r | |
703 | ld a,2 ;0499\r | |
704 | l049ch:\r | |
705 | or a\r | |
706 | ret ;049c\r | |
707 | \r | |
708 | \r | |
709 | ; search a free bank number in range\r | |
710 | ; h: max #\r | |
711 | ; l: min #\r | |
712 | ; ret:\r | |
713 | ; l: bank number available\r | |
714 | ; nc, if found, bank nr. in l\r | |
715 | ; cy, if none found\r | |
716 | \r | |
717 | sub_049dh:\r | |
718 | push de ;049d\r | |
719 | push bc ;049e\r | |
720 | ex de,hl ;049f\r | |
721 | dec e ;04a0\r | |
722 | l04a1h:\r | |
723 | inc e ;04a1 test next #\r | |
724 | ld a,d ;04a2\r | |
725 | cp e ;04a3\r | |
815c1735 | 726 | jr c,l04b1h ;04a4\r |
a16ba2b0 L |
727 | ld a,e ;04a6\r |
728 | ld hl,memalv ;04a7\r | |
729 | ld bc,alv_len ;04aa\r | |
730 | cpir ;04ad bank# allready allocated?\r | |
731 | jr z,l04a1h ;04af if yes, search for next\r | |
732 | l04b1h:\r | |
733 | ex de,hl ;04b1\r | |
734 | pop bc ;04b2\r | |
735 | pop de ;04b3\r | |
736 | ret ;04b4\r | |
737 | \r | |
738 | \r | |
739 | sub_04b5h:\r | |
740 | ld a,l ;04b5\r | |
741 | cp 012h ;04b6\r | |
742 | ccf ;04b8\r | |
743 | ret c ;04b9\r | |
744 | push hl ;04ba\r | |
745 | ld hl,banktab ;04bb\r | |
746 | call add_hl_a\r | |
747 | ld (hl),b ;04c3\r | |
748 | call gencrc_alv ;04c4\r | |
749 | pop hl ;04c7\r | |
750 | or a ;04c8 clear carry\r | |
751 | ret ;04c9\r | |
752 | \r | |
753 | \r | |
754 | ;--------------------------------------------------------------\r | |
755 | ;\r | |
756 | ; de: Log. Address\r | |
757 | ; a: Bank number\r | |
758 | ;\r | |
759 | ;out ahl: Phys. (linear) Address\r | |
760 | \r | |
761 | \r | |
762 | bnk2phys:\r | |
763 | push hl\r | |
764 | ld hl,banktab\r | |
765 | call add_hl_a\r | |
766 | ld a,(hl)\r | |
767 | pop hl\r | |
768 | \r | |
769 | ; fall thru\r | |
770 | ;--------------------------------------------------------------\r | |
771 | ;\r | |
772 | ; de: Log. Address\r | |
773 | ; a: Bank (bbr)\r | |
774 | ;\r | |
775 | ; OP: ahl = (a<<12) + (d<<8) + e\r | |
776 | ;\r | |
4caee1ec | 777 | ;out ahl: Phys. (linear) Address\r |
a16ba2b0 L |
778 | \r |
779 | \r | |
780 | log2phys:\r | |
781 | push bc ;\r | |
782 | ld c,a ;\r | |
783 | ld b,16 ;\r | |
784 | mlt bc ;bc = a<<4\r | |
785 | ld l,d ;\r | |
786 | ld h,0 ;\r | |
815c1735 | 787 | add hl,bc ;bc + d == a<<4 + d\r |
a16ba2b0 L |
788 | ld a,h ;\r |
789 | ld h,l ;\r | |
790 | ld l,e ;\r | |
791 | pop bc ;\r | |
792 | ret ;\r | |
793 | \r | |
794 | \r | |
795 | ;--------------------------------------------------------------\r | |
796 | ;\r | |
797 | ;return:\r | |
798 | ; hl = hl + a\r | |
799 | ; Flags undefined\r | |
800 | ;\r | |
801 | \r | |
802 | add_hl_a:\r | |
815c1735 L |
803 | add a,l\r |
804 | ld l,a\r | |
805 | ret nc\r | |
806 | inc h\r | |
807 | ret\r | |
a16ba2b0 L |
808 | \r |
809 | ; ---------------------------------------------------------\r | |
810 | \r | |
811 | sysramw:\r | |
812 | \r | |
813 | .phase isvsw_loc\r | |
814 | topcodsys:\r | |
815 | \r | |
816 | ; Trampoline for interrupt routines in banked ram.\r | |
817 | ; Switch stack pointer to "system" stack in top ram\r | |
818 | ; Save cbar\r | |
815c1735 | 819 | \r |
a16ba2b0 L |
820 | isv_sw: ;\r |
821 | ex (sp),hl ; save hl, return adr in hl\r | |
822 | push de ;\r | |
823 | push af ;\r | |
824 | ex de,hl ;\r | |
825 | ld hl,0 ;\r | |
826 | add hl,sp ;\r | |
827 | ld a,h ;\r | |
828 | cp 0f8h ;\r | |
829 | jr nc,isw_1 ;\r | |
830 | ld sp,$stack ;\r | |
831 | isw_1:\r | |
832 | push hl ;\r | |
833 | in0 h,(cbar) ;\r | |
834 | push hl ;\r | |
835 | ld a,SYS$CBAR ;\r | |
836 | out0 (cbar),a ;\r | |
837 | ex de,hl ;\r | |
838 | ld e,(hl) ;\r | |
839 | inc hl ;\r | |
840 | ld d,(hl) ;\r | |
841 | ex de,hl ;\r | |
842 | push bc ;\r | |
843 | call jphl ;\r | |
844 | \r | |
845 | pop bc ;\r | |
846 | pop hl ;\r | |
847 | out0 (cbar),h ;\r | |
848 | pop hl ;\r | |
849 | ld sp,hl ;\r | |
850 | pop af ;\r | |
851 | pop de ;\r | |
852 | pop hl ;\r | |
853 | ei ;\r | |
854 | ret ;\r | |
855 | jphl:\r | |
856 | jp (hl) ;\r | |
857 | \r | |
858 | ; ---------------------------------------------------------\r | |
859 | \r | |
4caee1ec | 860 | \r |
a16ba2b0 L |
861 | iprt0:\r |
862 | push af\r | |
863 | push hl\r | |
864 | in0 a,(tcr)\r | |
865 | in0 a,(tmdr0l)\r | |
866 | in0 a,(tmdr0h)\r | |
867 | ld a,(tim_ms)\r | |
868 | inc a\r | |
869 | cp 100\r | |
870 | jr nz,iprt_1\r | |
871 | xor a\r | |
872 | ld hl,(tim_s)\r | |
873 | inc hl\r | |
874 | ld (tim_s),hl\r | |
875 | iprt_1:\r | |
876 | ld (tim_ms),a\r | |
877 | pop hl\r | |
878 | pop af\r | |
879 | ei\r | |
880 | ret\r | |
881 | \r | |
882 | ; ---------------------------------------------------------\r | |
883 | \r | |
884 | sp.int0:\r | |
885 | ld a,0d0h\r | |
886 | jr sp.i.1\r | |
887 | sp.int.len equ $-sp.int0\r | |
888 | ld a,0d1h\r | |
889 | jr sp.i.1\r | |
890 | ld a,0d2h\r | |
891 | jr sp.i.1\r | |
892 | ld a,0d3h\r | |
893 | jr sp.i.1\r | |
894 | ld a,0d4h\r | |
895 | jr sp.i.1\r | |
896 | ld a,0d5h\r | |
897 | jr sp.i.1\r | |
898 | ld a,0d6h\r | |
899 | jr sp.i.1\r | |
900 | ld a,0d7h\r | |
901 | jr sp.i.1\r | |
902 | ld a,0d8h\r | |
903 | sp.i.1:\r | |
904 | ; out (80h),a\r | |
905 | halt\r | |
906 | \r | |
907 | curph defl $\r | |
908 | .dephase\r | |
909 | sysrame:\r | |
910 | .phase curph\r | |
911 | tim_ms: db 0\r | |
912 | tim_s: dw 0\r | |
913 | .dephase\r | |
815c1735 | 914 | \r |
a16ba2b0 L |
915 | ;-----------------------------------------------------\r |
916 | \r | |
917 | dseg\r | |
918 | \r | |
919 | ds 1\r | |
920 | banktabsys:\r | |
921 | ds 1 ;0c001h\r | |
922 | ds 1 ;0c002h\r | |
923 | banktab:\r | |
924 | ds BANKS ;0c003h\r | |
925 | memalv:\r | |
926 | ds 512/4 ;Number of 4k blocks\r | |
927 | alv_len equ $-memalv\r | |
928 | crc_len equ $-banktabsys\r | |
929 | \r | |
815c1735 | 930 | crc_memalv:\r |
a16ba2b0 L |
931 | ds 2 ;\r |
932 | \r | |
933 | cseg\r | |
934 | \r | |
935 | ;.phase 0ffc0h\r | |
936 | ;ivtab equ 0ffc0h ; 0ffc0h ;int vector table\r | |
937 | ;.dephase\r | |
938 | \r | |
939 | ;.phase 0fffch\r | |
940 | mark_55AA equ 0fffch\r | |
941 | ;ds 4 ; 0fffch\r | |
942 | ;.dephase\r | |
943 | \r | |
944 | \r | |
945 | end\r | |
946 | \r |