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Commit | Line | Data |
---|---|---|
1 | \r | |
2 | ; Interrupt drivers for ASCI0 and ASCI1\r | |
3 | \r | |
4 | global as0_dev,as1_dev\r | |
5 | \r | |
6 | extrn @ctbl,f_cpu\r | |
7 | extrn ff_empty,ff_get,ff_full,ff_put\r | |
8 | extrn ff_puth,ff_cnt,ff_gech\r | |
9 | extrn bufinit\r | |
10 | extrn isv_sw,ijphl,add_hla,div32_r\r | |
11 | extrn b_st_a,b_ld_a\r | |
12 | \r | |
13 | \r | |
14 | \r | |
15 | maclib z180reg.inc\r | |
16 | maclib config.inc\r | |
17 | maclib ioctl.inc\r | |
18 | maclib modebaud.inc\r | |
19 | \r | |
20 | \r | |
21 | m2b mbxon_bit,mb$xon$xoff\r | |
22 | \r | |
23 | ;-----------------------------------------------------\r | |
24 | \r | |
25 | dseg\r | |
26 | \r | |
27 | dw asci0_out\r | |
28 | dw asci0_osta\r | |
29 | dw asci0_inp\r | |
30 | dw asci0_ista\r | |
31 | dw asci_ioctl\r | |
32 | as0_dev:\r | |
33 | db 0 ;absolute device #\r | |
34 | db 0 ;relative device\r | |
35 | db 0 ;iflags\r | |
36 | db 0 ;fflags\r | |
37 | db M_CS8 ;cflags\r | |
38 | o.absdev equ 0\r | |
39 | o.reldev equ 1\r | |
40 | o.iflags equ 2\r | |
41 | o.fflags equ 3\r | |
42 | o.cflags equ 4\r | |
43 | \r | |
44 | db 0\r | |
45 | db 0\r | |
46 | oint.iflags equ as0_dev+o.iflags-s0.inbuf\r | |
47 | oint.fflags equ as0_dev+o.fflags-s0.inbuf\r | |
48 | mkbuf s0.rx_id, s0.inbuf, s0.rx_len\r | |
49 | mkbuf s0.tx_id, s0.outbuf,s0.tx_len\r | |
50 | \r | |
51 | \r | |
52 | dw asci1_out\r | |
53 | dw asci1_osta\r | |
54 | dw asci1_inp\r | |
55 | dw asci1_ista\r | |
56 | dw asci_ioctl\r | |
57 | as1_dev:\r | |
58 | db 0 ;absolute device #\r | |
59 | db 1 ;relative device\r | |
60 | db 0 ;iflags\r | |
61 | db 0 ;fflags\r | |
62 | db M_CS8 ;cflags\r | |
63 | \r | |
64 | db 0\r | |
65 | db 0\r | |
66 | mkbuf s1.rx_id, s1.inbuf, s1.rx_len\r | |
67 | mkbuf s1.tx_id, s1.outbuf,s1.tx_len\r | |
68 | \r | |
69 | \r | |
70 | \r | |
71 | dseg\r | |
72 | \r | |
73 | \r | |
74 | ioctl_ftab:\r | |
75 | dw func_tcinit ;(00h) CP/M 3 DEVINI function\r | |
76 | dw func_tcgeta ;(01h) Get the current serial port settings.\r | |
77 | dw func_tcseta ;(02h) Set the current serial port settings.\r | |
78 | dw func_tcsetaw ;(03h) Allow the output buffer to drain\r | |
79 | dw func_tcsetaf ;(04h) Allow the output buffer to drain, discard pending input\r | |
80 | dw func_tcsbrk ;(05h) Sending a break (250ms .. 500ms)\r | |
81 | dw func_tcsbrkp ;(06h) arg is timeinterval in 0.1sec\r | |
82 | dw func_tiocsbrk ;(07h) Turn break on\r | |
83 | dw func_tioccbrk ;(08h) Turn break off\r | |
84 | dw func_tcxonc ;(09h) Software flow control (TCOOFF, TCOON, TCIOFF, TCION)\r | |
85 | dw func_tcflsh ;(0Ah) Flush input/output buffer (TCIFLUSH, TCOFLUSH, TCIOFLUSH)\r | |
86 | dw func_fionread ;(0Bh) Get the number of bytes in the input buffer.\r | |
87 | dw func_tiocoutq ;(0Ch) Get the number of bytes in the output buffer.\r | |
88 | dw func_tiocmget ;(0Dh) get the status of modem bits.\r | |
89 | dw func_tiocmbis ;(0Eh) set the indicated modem bits.\r | |
90 | dw func_tiocmbic ;(0Fh) clear the indicated modem bits.\r | |
91 | dw func_tiocmset ;(10h) set the status of modem bits.\r | |
92 | dw func_tiocgsoftcar ;(11h) Get the status of the CLOCAL flag in the c_cflag field\r | |
93 | dw func_tiocssoftcar ;(12h) Set the CLOCAL flag when *argp is nonzero, and clear it otherwise.\r | |
94 | \r | |
95 | IOCTL_MAX equ ($-ioctl_ftab)/2\r | |
96 | dw nofunc\r | |
97 | \r | |
98 | \r | |
99 | ;--------------------------------------------------------------\r | |
100 | ;\r | |
101 | ; b: device number\r | |
102 | ; c: command\r | |
103 | ; de: ioctl arg pointer\r | |
104 | ; hl: ptr to driver local data\r | |
105 | ;\r | |
106 | \r | |
107 | asci_ioctl:\r | |
108 | push hl\r | |
109 | ex (sp),ix\r | |
110 | ld (ix+o.absdev),b\r | |
111 | ld hl,ioctl_ftab\r | |
112 | ld a,IOCTL_MAX\r | |
113 | cp c\r | |
114 | jr c,$+3\r | |
115 | ld a,c\r | |
116 | add a,a\r | |
117 | call add_hla\r | |
118 | ld a,(hl)\r | |
119 | inc hl\r | |
120 | ld h,(hl)\r | |
121 | ld l,a\r | |
122 | call ijphl\r | |
123 | pop ix\r | |
124 | nofunc:\r | |
125 | or a\r | |
126 | ret\r | |
127 | \r | |
128 | ;--------------------------------------------------------------\r | |
129 | ; CP/M 3 DEVINI function\r | |
130 | ; Init Serial I/O for input and output (ASCI 0/1)\r | |
131 | \r | |
132 | func_tcinit:\r | |
133 | call asci_stop\r | |
134 | \r | |
135 | init_st:\r | |
136 | ld c,asext0 ;Enable baud rate generator\r | |
137 | ld a,M_BRGMOD+M_DCD0DIS ; +M_CTS0DIS +M_BREAKEN\r | |
138 | bit CCTS_OFLOW,(ix+o.fflags)\r | |
139 | jr nz,$+4\r | |
140 | or M_CTS0DIS\r | |
141 | call out_asci_reg\r | |
142 | \r | |
143 | ld b,(ix+o.absdev)\r | |
144 | ld c,8 ;\r | |
145 | mlt bc ;\r | |
146 | ld hl,@ctbl+7 ;\r | |
147 | add hl,bc ;\r | |
148 | ld a,(hl) ;get baudrate index\r | |
149 | call as_br_div\r | |
150 | ld c,astc0l\r | |
151 | ld a,l\r | |
152 | call out_asci_reg\r | |
153 | inc c\r | |
154 | ld a,h\r | |
155 | call out_asci_reg\r | |
156 | \r | |
157 | \r | |
158 | ld c,cntlb0\r | |
159 | ld a,M_MPBT ;No MP Mode, X16\r | |
160 | bit PARODD,(ix+o.iflags)\r | |
161 | jr z,$+4\r | |
162 | or M_PEO\r | |
163 | call out_asci_reg\r | |
164 | \r | |
165 | ld c,cntla0\r | |
166 | ld a,(ix+o.cflags)\r | |
167 | srlan CS8\r | |
168 | ld hl,mod_tab\r | |
169 | call add_hla\r | |
170 | ld a,(hl)\r | |
171 | or a,M_RE+M_TE+M_RTS0+M_EFR ;Rx/Tx enable\r | |
172 | call out_asci_reg\r | |
173 | \r | |
174 | push ix\r | |
175 | bit 0,(ix+o.reldev)\r | |
176 | jr nz,init_1\r | |
177 | ld hl,rtxisvjmp0 ;rx/tx int vector\r | |
178 | ld (ivtab + IV$ASCI0),hl ;\r | |
179 | ld ix,s0.outbuf\r | |
180 | call bufinit\r | |
181 | ld ix,s0.inbuf\r | |
182 | jr init_2\r | |
183 | init_1:\r | |
184 | ld hl,rtxisvjmp1 ;rx/tx int vector\r | |
185 | ld (ivtab + IV$ASCI1),hl ;\r | |
186 | ld ix,s1.outbuf\r | |
187 | call bufinit\r | |
188 | ld ix,s1.inbuf\r | |
189 | init_2:\r | |
190 | call bufinit\r | |
191 | pop ix\r | |
192 | call asci_start\r | |
193 | ret\r | |
194 | \r | |
195 | ;--------------------------------------------------------------\r | |
196 | \r | |
197 | mod_tab:\r | |
198 | db 000B ; 7N1\r | |
199 | db 100B ; 8N1\r | |
200 | db 001B ; 7N2\r | |
201 | db 101B ; 8N2\r | |
202 | db 010B ; 7P1\r | |
203 | db 110B ; 8P1\r | |
204 | db 011B ; 7P2\r | |
205 | db 111B ; 8P2\r | |
206 | \r | |
207 | \r | |
208 | ;--------------------------------------------------------------\r | |
209 | ; Get the current serial port settings.\r | |
210 | \r | |
211 | func_tcgeta:\r | |
212 | ld a,d\r | |
213 | or e\r | |
214 | ld a,0ffh\r | |
215 | jr z,fgeta_e\r | |
216 | \r | |
217 | ld a,(ix+o.iflags)\r | |
218 | call b_st_a\r | |
219 | inc de\r | |
220 | ld a,(ix+o.fflags)\r | |
221 | call b_st_a\r | |
222 | inc de\r | |
223 | \r | |
224 | ld b,(ix+o.absdev)\r | |
225 | ld c,8 ;\r | |
226 | mlt bc ;\r | |
227 | ld hl,@ctbl+7 ;\r | |
228 | add hl,bc ;\r | |
229 | ld a,(hl) ;get baudrate index\r | |
230 | and M_CBAUD\r | |
231 | ld b,a\r | |
232 | ld a,(ix+o.cflags)\r | |
233 | and ~M_CBAUD\r | |
234 | or b\r | |
235 | call b_st_a\r | |
236 | dec de\r | |
237 | dec de\r | |
238 | xor a\r | |
239 | fgeta_e:\r | |
240 | ret\r | |
241 | \r | |
242 | \r | |
243 | ;--------------------------------------------------------------\r | |
244 | ; Set the current serial port settings.\r | |
245 | \r | |
246 | func_tcseta:\r | |
247 | ld a,d\r | |
248 | or e\r | |
249 | ld a,0ffh\r | |
250 | jr z,fseta_e\r | |
251 | \r | |
252 | call asci_stop\r | |
253 | \r | |
254 | call b_ld_a\r | |
255 | ld (ix+o.iflags),a\r | |
256 | inc de\r | |
257 | call b_ld_a\r | |
258 | ld (ix+o.fflags),a\r | |
259 | inc de\r | |
260 | \r | |
261 | ld b,(ix+o.absdev)\r | |
262 | ld c,8 ;\r | |
263 | mlt bc ;\r | |
264 | ld hl,@ctbl+7 ;\r | |
265 | add hl,bc ;\r | |
266 | call b_ld_a\r | |
267 | ld (ix+o.cflags),a\r | |
268 | and M_CBAUD\r | |
269 | ld (hl),a ;set baudrate index\r | |
270 | dec de\r | |
271 | dec de\r | |
272 | push de\r | |
273 | call init_st\r | |
274 | pop de\r | |
275 | xor a\r | |
276 | fseta_e:\r | |
277 | ret\r | |
278 | \r | |
279 | \r | |
280 | ;--------------------------------------------------------------\r | |
281 | ; Allow the output buffer to drain\r | |
282 | \r | |
283 | func_tcsetaw:\r | |
284 | \r | |
285 | ;--------------------------------------------------------------\r | |
286 | ; Allow the output buffer to drain, discard pending input\r | |
287 | \r | |
288 | func_tcsetaf:\r | |
289 | \r | |
290 | ;--------------------------------------------------------------\r | |
291 | ; Sending a break (250ms .. 500ms)\r | |
292 | \r | |
293 | func_tcsbrk:\r | |
294 | \r | |
295 | ;--------------------------------------------------------------\r | |
296 | ; arg is timeinterval in 0.1sec\r | |
297 | \r | |
298 | func_tcsbrkp:\r | |
299 | \r | |
300 | ;--------------------------------------------------------------\r | |
301 | ; Turn break on\r | |
302 | \r | |
303 | func_tiocsbrk:\r | |
304 | \r | |
305 | ;--------------------------------------------------------------\r | |
306 | ; Turn break off\r | |
307 | \r | |
308 | func_tioccbrk:\r | |
309 | \r | |
310 | ;--------------------------------------------------------------\r | |
311 | ; Software flow control (TCOOFF, TCOON, TCIOFF, TCION)\r | |
312 | \r | |
313 | func_tcxonc:\r | |
314 | \r | |
315 | ;--------------------------------------------------------------\r | |
316 | ; Flush input/output buffer (TCIFLUSH, TCOFLUSH, TCIOFLUSH)\r | |
317 | \r | |
318 | func_tcflsh:\r | |
319 | \r | |
320 | ;--------------------------------------------------------------\r | |
321 | ; Get the number of bytes in the input buffer.\r | |
322 | \r | |
323 | func_fionread:\r | |
324 | \r | |
325 | ;--------------------------------------------------------------\r | |
326 | ; Get the number of bytes in the output buffer.\r | |
327 | \r | |
328 | func_tiocoutq:\r | |
329 | \r | |
330 | ;--------------------------------------------------------------\r | |
331 | ; get the status of modem bits.\r | |
332 | \r | |
333 | func_tiocmget:\r | |
334 | \r | |
335 | ;--------------------------------------------------------------\r | |
336 | ; set the indicated modem bits.\r | |
337 | \r | |
338 | func_tiocmbis:\r | |
339 | \r | |
340 | ;--------------------------------------------------------------\r | |
341 | ; clear the indicated modem bits.\r | |
342 | \r | |
343 | func_tiocmbic:\r | |
344 | \r | |
345 | ;--------------------------------------------------------------\r | |
346 | ; set the status of modem bits.\r | |
347 | \r | |
348 | func_tiocmset:\r | |
349 | \r | |
350 | ;--------------------------------------------------------------\r | |
351 | ; Get the status of the CLOCAL flag in the c_cflag field\r | |
352 | \r | |
353 | func_tiocgsoftcar:\r | |
354 | \r | |
355 | ;--------------------------------------------------------------\r | |
356 | ; Set the CLOCAL flag when *argp is nonzero, and clear it otherwise.\r | |
357 | \r | |
358 | func_tiocssoftcar:\r | |
359 | \r | |
360 | or 0ffh\r | |
361 | ret\r | |
362 | \r | |
363 | ;--------------------------------------------------------------\r | |
364 | \r | |
365 | asci_stop:\r | |
366 | ld c,stat0 ;Disable rx/tx interrupts\r | |
367 | xor a ;\r | |
368 | call out_asci_reg\r | |
369 | \r | |
370 | ld c,cntla0 ;Disable receiver and transmitter\r | |
371 | ld a,M_RTS0+M_EFR ;RTS/CKA1\r | |
372 | jr out_asci_reg\r | |
373 | \r | |
374 | ;--------------------------------------------------------------\r | |
375 | \r | |
376 | asci_start:\r | |
377 | ld c,stat0 ;\r | |
378 | ld a,M_RIE\r | |
379 | jr out_asci_reg\r | |
380 | \r | |
381 | ;--------------------------------------------------------------\r | |
382 | ; output to asci0/1 register\r | |
383 | ;\r | |
384 | ; c: register address\r | |
385 | ; a: value\r | |
386 | ;\r | |
387 | \r | |
388 | out_asci_reg:\r | |
389 | push bc\r | |
390 | ld b,a\r | |
391 | ld a,c\r | |
392 | cp astc0l ;astc0/1 are 16 bit\r | |
393 | jr c,$+5\r | |
394 | add a,(ix+o.reldev)\r | |
395 | add a,(ix+o.reldev)\r | |
396 | ld c,a\r | |
397 | ld a,b\r | |
398 | ld b,0\r | |
399 | out (c),a\r | |
400 | pop bc\r | |
401 | ret\r | |
402 | \r | |
403 | ;--------------------------------------------------------------\r | |
404 | ; baud rate divider\r | |
405 | ;\r | |
406 | ; a: index\r | |
407 | ; return\r | |
408 | ; hl: divider\r | |
409 | \r | |
410 | as_br_div:\r | |
411 | push de\r | |
412 | push bc\r | |
413 | and 0fh\r | |
414 | add a,a ;get factor\r | |
415 | ld hl,bd150_tab\r | |
416 | call add_hla\r | |
417 | ld c,(hl)\r | |
418 | inc hl\r | |
419 | ld b,(hl)\r | |
420 | ld hl,(f_cpu)\r | |
421 | ld de,(f_cpu+2)\r | |
422 | call div32_r\r | |
423 | ld bc,32*150\r | |
424 | call div32_r\r | |
425 | ld de,2\r | |
426 | or a\r | |
427 | sbc hl,de\r | |
428 | pop bc\r | |
429 | pop de\r | |
430 | ret nc\r | |
431 | ld hl,0\r | |
432 | ret\r | |
433 | \r | |
434 | bd150_tab:\r | |
435 | ; factor index baudrate orig. cp/m\r | |
436 | dw 19200/150 ; 0 19200 -\r | |
437 | dw 28800/150 ; 1 28800 50\r | |
438 | dw 38400/150 ; 2 38400 75\r | |
439 | dw 57600/150 ; 3 57600 110\r | |
440 | dw 11520/15 ; 4 115200 134.5\r | |
441 | dw 150/150 ; 5 150\r | |
442 | dw 300/150 ; 6 300\r | |
443 | dw 600/150 ; 7 600\r | |
444 | dw 1200/150 ; 8 1200\r | |
445 | dw 1800/150 ; 9 1800\r | |
446 | dw 2400/150 ;10 2400\r | |
447 | dw 3600/150 ;11 3600\r | |
448 | dw 4800/150 ;12 4800\r | |
449 | dw 7200/150 ;13 7200\r | |
450 | dw 9600/150 ;14 9600\r | |
451 | dw 19200/150 ;15 19200\r | |
452 | \r | |
453 | \r | |
454 | ;--------------------------------------------------------------\r | |
455 | \r | |
456 | if 0\r | |
457 | \r | |
458 | initab0:\r | |
459 | db 1,stat0,0 ;Disable rx/tx interrupts\r | |
460 | ;Enable baud rate generator\r | |
461 | db 1,asext0,M_BRGMOD+M_DCD0DIS ; +M_CTS0DIS\r | |
462 | db 2,astc0l\r | |
463 | init_br_off equ $ - initab0\r | |
464 | dw 28\r | |
465 | db 1,cntlb0,M_MPBT ;No MP Mode, X16\r | |
466 | db 1,cntla0,M_RE+M_TE+M_MOD2 ;Rx/Tx enable, 8N1\r | |
467 | db 0\r | |
468 | \r | |
469 | initab1:\r | |
470 | db 1,stat1,0 ;Disable rx/tx ints, disable CTS1\r | |
471 | db 1,asext1,M_BRGMOD ;Enable baud rate generator\r | |
472 | db 2,astc1l,low 3, high 3\r | |
473 | db 1,cntlb1,M_MPBT ;No MP Mode, X16\r | |
474 | db 1,cntla1,M_RE+M_TE+M_MOD2 ;Rx/Tx enable, 8N1\r | |
475 | db 0\r | |
476 | endif\r | |
477 | \r | |
478 | ;--------------------------------------------------------------\r | |
479 | \r | |
480 | dseg\r | |
481 | asci0_ista:\r | |
482 | push ix\r | |
483 | ld ix,s0.inbuf ;\r | |
484 | call ff_empty\r | |
485 | pop ix\r | |
486 | ret\r | |
487 | \r | |
488 | ;--------------------------------------------------------------\r | |
489 | \r | |
490 | asci1_ista:\r | |
491 | push ix\r | |
492 | ld ix,s1.inbuf ;\r | |
493 | call ff_empty\r | |
494 | pop ix\r | |
495 | ret\r | |
496 | \r | |
497 | ;--------------------------------------------------------------\r | |
498 | ; Get an input character\r | |
499 | \r | |
500 | asci0_inp:\r | |
501 | push ix\r | |
502 | ld ix,s0.inbuf ;\r | |
503 | call ff_gech\r | |
504 | ld a,b\r | |
505 | cp s0.rx_len/4\r | |
506 | jr nc,a0i_1\r | |
507 | di\r | |
508 | in0 a,(cntla0)\r | |
509 | and ~M_RTS0 ;assert RTS\r | |
510 | or M_EFR ;don't reset error flags\r | |
511 | ei\r | |
512 | out0 (cntla0),a\r | |
513 | a0i_1:\r | |
514 | ld a,c\r | |
515 | pop ix\r | |
516 | ret\r | |
517 | \r | |
518 | ;--------------------------------------------------------------\r | |
519 | ; Get an input character\r | |
520 | \r | |
521 | asci1_inp:\r | |
522 | push ix\r | |
523 | ld ix,s1.inbuf ;\r | |
524 | call ff_gech\r | |
525 | pop ix\r | |
526 | ret\r | |
527 | \r | |
528 | ;--------------------------------------------------------------\r | |
529 | ; Output status\r | |
530 | \r | |
531 | asci0_osta:\r | |
532 | push ix\r | |
533 | ld ix,s0.outbuf ;\r | |
534 | call ff_full\r | |
535 | pop ix\r | |
536 | ret\r | |
537 | \r | |
538 | ;--------------------------------------------------------------\r | |
539 | ; Output status\r | |
540 | \r | |
541 | asci1_osta:\r | |
542 | push ix\r | |
543 | ld ix,s1.outbuf ;\r | |
544 | call ff_full\r | |
545 | pop ix\r | |
546 | ret\r | |
547 | \r | |
548 | ;--------------------------------------------------------------\r | |
549 | ; put character in c in buffer\r | |
550 | ; destroys hl, bc\r | |
551 | ; returns output char in a\r | |
552 | \r | |
553 | asci0_out:\r | |
554 | push ix ;\r | |
555 | ld ix,s0.outbuf ;\r | |
556 | call ff_puth\r | |
557 | pop ix ;\r | |
558 | di ;\r | |
559 | in0 c,(stat0) ;\r | |
560 | set TIE,c ;\r | |
561 | out0 (stat0),c ;\r | |
562 | ei ;\r | |
563 | ret\r | |
564 | \r | |
565 | ;--------------------------------------------------------------\r | |
566 | ; put character in c in buffer\r | |
567 | ; destroys hl, bc\r | |
568 | ; returns output char in a\r | |
569 | \r | |
570 | asci1_out:\r | |
571 | push ix ;\r | |
572 | ld ix,s1.outbuf ;\r | |
573 | call ff_puth\r | |
574 | pop ix ;\r | |
575 | di ;\r | |
576 | in0 c,(stat1) ;\r | |
577 | set TIE,c ;\r | |
578 | out0 (stat1),c ;\r | |
579 | ei ;\r | |
580 | ret\r | |
581 | \r | |
582 | \r | |
583 | ;--------------------------------------------------------------\r | |
584 | \r | |
585 | cseg\r | |
586 | rtxisvjmp0:\r | |
587 | call isv_sw\r | |
588 | dw rxtxi0\r | |
589 | rtxisvjmp1:\r | |
590 | call isv_sw\r | |
591 | dw rxtxi1\r | |
592 | \r | |
593 | ;--------------------------------------------------------------\r | |
594 | ; ASCI 0 Transmit/Receive interupt routines\r | |
595 | \r | |
596 | dseg\r | |
597 | rxtxi0:\r | |
598 | push ix\r | |
599 | rxtxi0_lp0:\r | |
600 | ld ix,s0.inbuf ;\r | |
601 | rxtxi0_lp1:\r | |
602 | in0 a,(stat0) ;receive flag set?\r | |
603 | jp p,rxtxi0_1 ;RDRF == Bit 7\r | |
604 | and M_OVRN+M_PERR+M_FE\r | |
605 | ld e,a\r | |
606 | \r | |
607 | in0 a,(asext0)\r | |
608 | and M_BREAK\r | |
609 | or e\r | |
610 | ld e,a\r | |
611 | \r | |
612 | in0 d,(cntla0) ;\r | |
613 | res EFR,d ;\r | |
614 | out0 (cntla0),d\r | |
615 | \r | |
616 | \r | |
617 | ld c,(ix+o.in_idx) ;\r | |
618 | ld b,0\r | |
619 | ld hl,s0.inbuf ;\r | |
620 | add hl,bc\r | |
621 | \r | |
622 | in0 a,(rdr0) ;\r | |
623 | ld (hl),a\r | |
624 | ;todo: break detection\r | |
625 | ;todo: parity, framing overrun error\r | |
626 | \r | |
627 | \r | |
628 | ld e,(ix+oint.fflags)\r | |
629 | bit IXON,e\r | |
630 | jr z,rxtxi0_2\r | |
631 | \r | |
632 | ;todo: test XON/XOFF\r | |
633 | \r | |
634 | rxtxi0_2:\r | |
635 | \r | |
636 | \r | |
637 | ld a,c ;increment buffer in pointer\r | |
638 | inc a ;\r | |
639 | ld b,(ix+o.mask) ;\r | |
640 | and b ;\r | |
641 | ld c,a\r | |
642 | \r | |
643 | sub (ix+o.out_idx) ;\r | |
644 | jr z,rxtxi0_lp1 ;skip if buffer is full\r | |
645 | \r | |
646 | ld (ix+o.in_idx),c ;\r | |
647 | \r | |
648 | jr nc,$+3 ;\r | |
649 | adc b ;\r | |
650 | \r | |
651 | cp s0.tx_len*3/4\r | |
652 | jr c,rxi0_noflow\r | |
653 | \r | |
654 | bit CRTS_IFLOW,e\r | |
655 | jr z,rxtxi0_4\r | |
656 | \r | |
657 | set EFR,d\r | |
658 | set RTS0,d ;RTS inactive\r | |
659 | out0 (cntla0),d ;\r | |
660 | \r | |
661 | rxtxi0_4:\r | |
662 | bit IXOFF,e\r | |
663 | jr z,rxtxi0_lp1\r | |
664 | ;todo: send XOFF\r | |
665 | \r | |
666 | rxi0_noflow:\r | |
667 | jr rxtxi0_lp1\r | |
668 | \r | |
669 | \r | |
670 | rxtxi0_1:\r | |
671 | ld e,a\r | |
672 | bit TDRE,e ;TX int?\r | |
673 | jr z,rxtxi0_e ;\r | |
674 | \r | |
675 | \r | |
676 | ld ix,s0.outbuf ;\r | |
677 | \r | |
678 | ld a,(ix+o.out_idx) ;\r | |
679 | cp (ix+o.in_idx) ;if index.in == index.out\r | |
680 | jr z,?0ti_2 ; buffer empty\r | |
681 | \r | |
682 | ld hl,s0.outbuf ;\r | |
683 | ld c,a\r | |
684 | ld b,0\r | |
685 | add hl,bc\r | |
686 | ld b,(hl)\r | |
687 | out0 (tdr0),b ; 7\r | |
688 | \r | |
689 | inc a\r | |
690 | and (ix+o.mask)\r | |
691 | ld (ix+o.out_idx),a\r | |
692 | jr rxtxi0_lp0\r | |
693 | \r | |
694 | ?0ti_2:\r | |
695 | res TIE,e ;disable tx-int\r | |
696 | out0 (stat0),e ; 5\r | |
697 | \r | |
698 | rxtxi0_e:\r | |
699 | pop ix\r | |
700 | ret\r | |
701 | \r | |
702 | \r | |
703 | ;--------------------------------------------------------------\r | |
704 | ; ASCI 1 Transmit/Receive interupt routines\r | |
705 | \r | |
706 | dseg\r | |
707 | rxtxi1:\r | |
708 | in0 e,(stat1) ;receive flag set? 5\r | |
709 | jp p,txi1_0 ;\r | |
710 | \r | |
711 | in0 d,(rdr1) ;todo: break detection 9\r | |
712 | bit FE,e ;framing error?\r | |
713 | jr nz,??ri_1\r | |
714 | \r | |
715 | push ix\r | |
716 | ld ix,s1.inbuf ;\r | |
717 | ld hl,s1.inbuf ;\r | |
718 | ld c,(ix+o.in_idx) ;\r | |
719 | ld b,0\r | |
720 | add hl,bc\r | |
721 | ld (hl),d\r | |
722 | \r | |
723 | ld a,c ;\r | |
724 | inc a\r | |
725 | and (ix+o.mask)\r | |
726 | cp (ix+o.out_idx) ;\r | |
727 | jr z,$+5 ;skip if buffer is full\r | |
728 | ld (ix+o.in_idx),a\r | |
729 | pop ix\r | |
730 | ??ri_1:\r | |
731 | in0 a,(cntla1) ; 1\r | |
732 | res EFR,a ;\r | |
733 | out0 (cntla1),a ; 1\r | |
734 | ret\r | |
735 | \r | |
736 | txi1_0:\r | |
737 | push ix\r | |
738 | ld ix,s1.outbuf ;\r | |
739 | \r | |
740 | ld a,(ix+o.out_idx) ;\r | |
741 | cp (ix+o.in_idx) ;if index.in == index.out\r | |
742 | jr z,??ti_2 ; buffer empty\r | |
743 | \r | |
744 | ld hl,s1.outbuf ;\r | |
745 | ld c,a\r | |
746 | ld b,0\r | |
747 | add hl,bc\r | |
748 | ld l,(hl)\r | |
749 | out0 (tdr1),l ; 7\r | |
750 | \r | |
751 | inc a\r | |
752 | and (ix+o.mask)\r | |
753 | ld (ix+o.out_idx),a\r | |
754 | jr ??ti_3\r | |
755 | ??ti_2:\r | |
756 | res TIE,e ;disable tx-int\r | |
757 | out0 (stat1),e ; 5\r | |
758 | ??ti_3:\r | |
759 | pop ix\r | |
760 | ret\r | |
761 | \r | |
762 | \r | |
763 | \r | |
764 | end\r |