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1 | TITLE 'sd disk handler'\r | |
2 | \r | |
3 | ; CP/M-80 Version 3 -- Modular BIOS\r | |
4 | \r | |
5 | \r | |
6 | ; Disk drive dispatching tables for linked BIOS\r | |
7 | \r | |
8 | public sd0,sd1,sd2,sd3\r | |
9 | public sd4,sd5,sd6,sd7\r | |
10 | \r | |
11 | ; Variables containing parameters passed by BDOS\r | |
12 | \r | |
13 | extrn @xdph,@op\r | |
14 | extrn @adrv,@rdrv\r | |
15 | extrn @trk,@sect,@cnt\r | |
16 | extrn @dma,@dbnk\r | |
17 | \r | |
18 | ; System Control Block variables\r | |
19 | \r | |
20 | extrn @ermde ; BDOS error mode\r | |
21 | \r | |
22 | ; Utility routines\r | |
23 | \r | |
24 | extrn ?wboot ; warm boot vector\r | |
25 | extrn ?pmsg ; print message @<HL>\r | |
26 | extrn pr.idx ; print indexed message\r | |
27 | extrn pr.inln,pr.crlf ; print inline message, print <cr><lf>\r | |
28 | extrn pr.errors ; print BIOS disk error header\r | |
29 | extrn bnk2phy ; translate banked to physical linear address\r | |
30 | extrn msg.sm ; send message to AVR\r | |
31 | extrn msg.recv ; receive message from AVR\r | |
32 | extrn add_hla ; add <A> to <HL>\r | |
33 | \r | |
34 | \r | |
35 | ; Port Address Equates\r | |
36 | \r | |
37 | maclib z180reg.inc\r | |
38 | maclib config.inc\r | |
39 | \r | |
40 | ; CP/M 3 Disk definition macros\r | |
41 | \r | |
42 | maclib cpm3slr.lib\r | |
43 | \r | |
44 | ; Z180 macro library instruction definitions (ignored by slr180)\r | |
45 | \r | |
46 | maclib z180.lib\r | |
47 | \r | |
48 | ; common control characters\r | |
49 | \r | |
50 | cr equ 13\r | |
51 | lf equ 10\r | |
52 | bell equ 7\r | |
53 | \r | |
54 | \r | |
55 | dseg\r | |
56 | \r | |
57 | ; Extended Disk Parameter Headers (XPDHs)\r | |
58 | \r | |
59 | ; dph translate$table, - disk parameter header\r | |
60 | ; disk$parameter$block,\r | |
61 | ; checksum$size, (optional)\r | |
62 | ; alloc$size (optional)\r | |
63 | \r | |
64 | dw sd$write\r | |
65 | dw sd$read\r | |
66 | dw sd$login\r | |
67 | dw sd$init0\r | |
68 | db 0,0 ; relative drive zero\r | |
69 | sd0: dph 0,dpbsimhd512\r | |
70 | \r | |
71 | dw sd$write\r | |
72 | dw sd$read\r | |
73 | dw sd$login\r | |
74 | dw sd$init1\r | |
75 | db 1,0 ; relative drive one\r | |
76 | sd1: dph 0,dpbsimhd512\r | |
77 | \r | |
78 | dw sd$write\r | |
79 | dw sd$read\r | |
80 | dw sd$login\r | |
81 | dw sd$init2\r | |
82 | db 2,0 ; relative drive zero\r | |
83 | sd2: dph 0,dpbsimhd512\r | |
84 | \r | |
85 | dw sd$write\r | |
86 | dw sd$read\r | |
87 | dw sd$login\r | |
88 | dw sd$init3\r | |
89 | db 3,0 ; relative drive one\r | |
90 | sd3: dph 0,dpbsimhd512\r | |
91 | \r | |
92 | \r | |
93 | dw sd$write\r | |
94 | dw sd$read\r | |
95 | dw sd$login\r | |
96 | dw sd$init4\r | |
97 | db 4,0 ; relative drive zero\r | |
98 | sd4: dph 0,dpbsimhd512\r | |
99 | \r | |
100 | dw sd$write\r | |
101 | dw sd$read\r | |
102 | dw sd$login\r | |
103 | dw sd$init5\r | |
104 | db 5,0 ; relative drive one\r | |
105 | sd5: dph 0,dpbsimhd512\r | |
106 | \r | |
107 | dw sd$write\r | |
108 | dw sd$read\r | |
109 | dw sd$login\r | |
110 | dw sd$init6\r | |
111 | db 6,0 ; relative drive zero\r | |
112 | sd6: dph 0,dpbsimhd512\r | |
113 | \r | |
114 | dw sd$write\r | |
115 | dw sd$read\r | |
116 | dw sd$login\r | |
117 | dw sd$init7\r | |
118 | db 7,0 ; relative drive one\r | |
119 | sd7: dph 0,dpbsimhd512\r | |
120 | \r | |
121 | \r | |
122 | cseg ; DPB must be resident\r | |
123 | \r | |
124 | ; dpb physical$sector$size, - disk parameter block\r | |
125 | ; physical$sectors$per$track,\r | |
126 | ; number$tracks,\r | |
127 | ; block$size,\r | |
128 | ; number$dir$entries,\r | |
129 | ; track$offset,\r | |
130 | ; checksum$vec$size (optional)\r | |
131 | \r | |
132 | dpbsimhd512:\r | |
133 | dpb 512,8,2048,4096,1024,6,8100h\r | |
134 | \r | |
135 | \r | |
136 | dseg ; rest is banked\r | |
137 | \r | |
138 | ; Disk I/O routines for standardized BIOS interface\r | |
139 | \r | |
140 | ; Initialization entry point.\r | |
141 | ; called for first time initialization.\r | |
142 | \r | |
143 | sd$init0:\r | |
144 | call pr.inln ;\r | |
145 | db 'sdio: SD Card driver'cr,lf,0\r | |
146 | ret\r | |
147 | \r | |
148 | sd$init1:\r | |
149 | sd$init2:\r | |
150 | sd$init3:\r | |
151 | sd$init4:\r | |
152 | sd$init5:\r | |
153 | sd$init6:\r | |
154 | sd$init7:\r | |
155 | ret ; all initialization done by drive 0\r | |
156 | \r | |
157 | \r | |
158 | ; This entry is called when a logical drive is about to\r | |
159 | ; be logged into for the purpose of density determination.\r | |
160 | ; It may adjust the parameters contained in the disk\r | |
161 | ; parameter header pointed at by <DE>\r | |
162 | ;\r | |
163 | ; absolute drive number in @adrv (8 bits) +0\r | |
164 | ; relative drive number in @rdrv (8 bits) +1\r | |
165 | \r | |
166 | sd$login:\r | |
167 | xor a\r | |
168 | ld (residual),a\r | |
169 | ld hl,send_msg+1\r | |
170 | ld (hl),0 ;login function\r | |
171 | inc hl\r | |
172 | ld bc,(@adrv)\r | |
173 | ld (hl),c ;@adrv\r | |
174 | inc hl\r | |
175 | ld (hl),b ;@rdrv\r | |
176 | inc hl\r | |
177 | \r | |
178 | ex de,hl ;xdph to hl\r | |
179 | xor a ;bank 0\r | |
180 | call bnk2phy ;phys. linear address\r | |
181 | ex de,hl\r | |
182 | ld (hl),e\r | |
183 | inc hl\r | |
184 | ld (hl),d\r | |
185 | inc hl\r | |
186 | ld (hl),a\r | |
187 | \r | |
188 | ld hl,send_msg\r | |
189 | ld b,send_msg_login_len\r | |
190 | call msg.sm\r | |
191 | \r | |
192 | ld hl,recv_msg\r | |
193 | ld b,recv_msg_len ; max receive message len\r | |
194 | call msg.recv\r | |
195 | \r | |
196 | ld a,(recv_msg_rc)\r | |
197 | or a\r | |
198 | ret z\r | |
199 | ld hl,0\r | |
200 | ld (@xdph),hl\r | |
201 | ret ;\r | |
202 | \r | |
203 | \r | |
204 | \r | |
205 | ; disk READ and WRITE entry points.\r | |
206 | ; these entries are called with the following arguments:\r | |
207 | ;\r | |
208 | ; operation type (r/w) in @op (8 bits) +0\r | |
209 | ; absolute drive number in @adrv (8 bits) +1\r | |
210 | ; relative drive number in @rdrv (8 bits) +2\r | |
211 | ; disk track address in @trk (16 bits) +3\r | |
212 | ; disk sector address in @sect(16 bits) +5\r | |
213 | ; multi sector count in @cnt (8 bits) +7\r | |
214 | ; disk transfer address in @dma (16 bits) +8\r | |
215 | ; disk transfer bank in @dbnk (8 bits) +10\r | |
216 | ; pointer to XDPH in <DE>\r | |
217 | ;\r | |
218 | ; they transfer the appropriate data, perform retries\r | |
219 | ; if necessary, then return an error code in <A>\r | |
220 | \r | |
221 | sd$read:\r | |
222 | sd$write:\r | |
223 | ld hl,residual ; remainng sectors from last multi io?\r | |
224 | ld a,(hl)\r | |
225 | sub a,1\r | |
226 | jr c,rwc_new_sectors\r | |
227 | \r | |
228 | ld (hl),a\r | |
229 | xor a\r | |
230 | ret\r | |
231 | \r | |
232 | rwc_new_sectors:\r | |
233 | ld b,1 ; assume 1 sector to transfer\r | |
234 | ld a,(@cnt)\r | |
235 | or a\r | |
236 | jr z,rwc_doit\r | |
237 | \r | |
238 | ld b,a ; number of sectors to transfer\r | |
239 | dec a ; save remaining\r | |
240 | ld (hl),a\r | |
241 | xor a ; reset multi sector count\r | |
242 | ld (@cnt),a\r | |
243 | \r | |
244 | ; compute pysical transfer address\r | |
245 | ; prepare message\r | |
246 | ; and send it to AVR.\r | |
247 | \r | |
248 | rwc_doit:\r | |
249 | ld a,b\r | |
250 | ld hl,@op ;address of arguments\r | |
251 | ld de,send_msg+1\r | |
252 | ld bc,7\r | |
253 | ldir\r | |
254 | ld (de),a ;number of sectors\r | |
255 | inc de\r | |
256 | push de\r | |
257 | ld e,(hl) ;dma address\r | |
258 | inc hl\r | |
259 | ld d,(hl)\r | |
260 | inc hl\r | |
261 | ld a,(hl) ;bank\r | |
262 | ex de,hl\r | |
263 | call bnk2phy ;phys. linear address\r | |
264 | ex de,hl\r | |
265 | pop hl\r | |
266 | ld (hl),e\r | |
267 | inc hl\r | |
268 | ld (hl),d\r | |
269 | inc hl\r | |
270 | ld (hl),a\r | |
271 | \r | |
272 | retry:\r | |
273 | \r | |
274 | ld hl,send_msg\r | |
275 | ld b,send_msg_rw_len\r | |
276 | call msg.sm\r | |
277 | \r | |
278 | ld hl,recv_msg\r | |
279 | ld b,recv_msg_len ; max receive message len\r | |
280 | call msg.recv\r | |
281 | ld a,(recv_msg_rc)\r | |
282 | or a\r | |
283 | ret z ; check status and return to BDOS if no error\r | |
284 | \r | |
285 | ld hl,print_details\r | |
286 | call pr.errors\r | |
287 | jr z,retry ; Yes, then retry once more\r | |
288 | ; otherwise,\r | |
289 | xor a\r | |
290 | ld (residual),a\r | |
291 | ld a,(recv_msg_rc) ; return hard error to BDOS\r | |
292 | ld c,0ffh\r | |
293 | cp 6 ; media changed?\r | |
294 | jr z,e_exit\r | |
295 | ld c,2\r | |
296 | cp 5 ; disk read only?\r | |
297 | jr z,e_exit\r | |
298 | dec c\r | |
299 | e_exit:\r | |
300 | ld a,c\r | |
301 | ret\r | |
302 | \r | |
303 | ;-------------------------------------------------------------------------------\r | |
304 | \r | |
305 | print_details:\r | |
306 | ld a,(recv_msg_rc)\r | |
307 | push af\r | |
308 | and a,07fh\r | |
309 | jr z,fatfs_err\r | |
310 | \r | |
311 | ld hl,drvmsg0 ; point at first driver error message\r | |
312 | call pr.idx\r | |
313 | \r | |
314 | fatfs_err:\r | |
315 | pop af\r | |
316 | and 080h\r | |
317 | ret z ; no fatfs error\r | |
318 | \r | |
319 | call pr.inln\r | |
320 | db 'FatFs: ',0\r | |
321 | \r | |
322 | ld hl,fr$msg0 ; point at first FatFs message\r | |
323 | ld a,(recv_msg_rc+1)\r | |
324 | jp pr.idx ; return via print routine\r | |
325 | \r | |
326 | \r | |
327 | ;-------------------------------------------------------------------------------\r | |
328 | \r | |
329 | residual:\r | |
330 | db 0\r | |
331 | \r | |
332 | send_msg:\r | |
333 | db 2 ; disk command\r | |
334 | ds 1 ; subcommand (login/read/write)\r | |
335 | ds 1 ; @adrv\r | |
336 | ds 1 ; @rdrv\r | |
337 | ; -read/write- -login-\r | |
338 | ds 2 ; @trk xdph address\r | |
339 | ds 2 ; @sect (3 byte)\r | |
340 | ds 1 ; @cnt\r | |
341 | ds 3 ; transfer addr\r | |
342 | send_msg_rw_len equ $ - send_msg\r | |
343 | send_msg_login_len equ 7\r | |
344 | \r | |
345 | \r | |
346 | recv_msg:\r | |
347 | ds 1 ; len\r | |
348 | ds 1 ; command\r | |
349 | ds 1 ; subcommand\r | |
350 | recv_msg_rc:\r | |
351 | ds 1 ; result code\r | |
352 | ds 4 ; room for additional parameter\r | |
353 | recv_msg_len equ $ - recv_msg\r | |
354 | \r | |
355 | \r | |
356 | ;-------------------------------------------------------------------------------\r | |
357 | ; error message components\r | |
358 | ; general driver errors\r | |
359 | \r | |
360 | drvmsg0: db 'Unknown Error, ',0\r | |
361 | drvmsg1: db 'Invalid Parameter(s), ',0\r | |
362 | drvmsg2: db 'Invalid Drive, ',0\r | |
363 | drvmsg3: db 'Bus Timeout, ',0\r | |
364 | drvmsg4: db 'Access beyond disk size, ',0\r | |
365 | drvmsg5: db 'Write protected, ',0\r | |
366 | drvmsg6: db 'No media, ',0\r | |
367 | db 0\r | |
368 | \r | |
369 | ; fat file system errors\r | |
370 | \r | |
371 | fr$msg0: db 'Unknown Error,',0\r | |
372 | fr$msg1: db 'DISK_ERR,',0\r | |
373 | fr$msg2: db 'INT_ERR,',0\r | |
374 | fr$msg3: db 'NOT_READY,',0\r | |
375 | fr$msg4: db 'NO_FILE,',0\r | |
376 | fr$msg5: db 'NO_PATH,',0\r | |
377 | fr$msg6: db 'INVALID_NAME,',0\r | |
378 | fr$msg7: db 'DENIED,',0\r | |
379 | fr$msg8: db 'EXIST,',0\r | |
380 | fr$msg9: db 'INVALID_OBJECT,',0\r | |
381 | fr$msg10: db 'WRITE_PROTECTED,',0\r | |
382 | fr$msg11: db 'INVALID_DRIVE,',0\r | |
383 | fr$msg12: db 'NOT_ENABLED,',0\r | |
384 | fr$msg13: db 'NO_FILE_SYSTEM,',0\r | |
385 | fr$msg14: db 'MKFS_ABORTED,',0\r | |
386 | fr$msg15: db 'TIMEOUT,',0\r | |
387 | fr$msg16: db 'LOCKED,',0\r | |
388 | fr$msg17: db 'NOT_ENOUGH_CORE,',0\r | |
389 | fr$msg18: db 'TOO_MANY_OPEN_FILES,',0\r | |
390 | fr$msg19: db 'FR_INVALID_PARAMETER,',0\r | |
391 | fr$msg20: db 'short read/write,',0\r | |
392 | db 0\r | |
393 | \r | |
394 | end\r |