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1 | /* pdp18b_mt.c: 18b PDP magnetic tape simulator\r |
2 | \r | |
3 | Copyright (c) 1993-2006, Robert M Supnik\r | |
4 | \r | |
5 | Permission is hereby granted, free of charge, to any person obtaining a\r | |
6 | copy of this software and associated documentation files (the "Software"),\r | |
7 | to deal in the Software without restriction, including without limitation\r | |
8 | the rights to use, copy, modify, merge, publish, distribute, sublicense,\r | |
9 | and/or sell copies of the Software, and to permit persons to whom the\r | |
10 | Software is furnished to do so, subject to the following conditions:\r | |
11 | \r | |
12 | The above copyright notice and this permission notice shall be included in\r | |
13 | all copies or substantial portions of the Software.\r | |
14 | \r | |
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r | |
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r | |
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL\r | |
18 | ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r | |
19 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r | |
20 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r | |
21 | \r | |
22 | Except as contained in this notice, the name of Robert M Supnik shall not be\r | |
23 | used in advertising or otherwise to promote the sale, use or other dealings\r | |
24 | in this Software without prior written authorization from Robert M Supnik.\r | |
25 | \r | |
26 | mt (PDP-9) TC59 magtape\r | |
27 | (PDP-15) TC59D magtape\r | |
28 | \r | |
29 | 16-Feb-06 RMS Added tape capacity checking\r | |
30 | 16-Aug-05 RMS Fixed C++ declaration and cast problems\r | |
31 | 18-Mar-05 RMS Added attached test to detach routine\r | |
32 | 14-Jan-04 RMS Revised IO device call interface\r | |
33 | 25-Apr-03 RMS Revised for extended file support\r | |
34 | 28-Mar-03 RMS Added multiformat support\r | |
35 | 04-Mar-03 RMS Fixed bug in MTTR\r | |
36 | 01-Mar-03 RMS Fixed bug in interrupt handling\r | |
37 | Revised for magtape library\r | |
38 | 02-Feb-03 RMS Revised IOT decoding\r | |
39 | 30-Oct-02 RMS Revised BOT handling, added error record handling\r | |
40 | 05-Oct-02 RMS Added DIB, device number support\r | |
41 | Revamped error recovery\r | |
42 | 28-Aug-02 RMS Added end of medium support\r | |
43 | 30-May-02 RMS Widened POS to 32b\r | |
44 | 22-Apr-02 RMS Added maximum record length test\r | |
45 | 06-Jan-02 RMS Revised enabled/disable support\r | |
46 | 29-Nov-01 RMS Added read only unit support\r | |
47 | 25-Nov-01 RMS Revised interrupt structure\r | |
48 | Changed UST, POS, FLG to arrays\r | |
49 | 26-Apr-01 RMS Added device enable/disable support\r | |
50 | 15-Feb-01 RMS Fixed 3-cycle data break sequence\r | |
51 | 04-Oct-98 RMS V2.4 magtape format\r | |
52 | 22-Jan-97 RMS V2.3 magtape format\r | |
53 | 29-Jun-96 RMS Added unit enable/disable support\r | |
54 | \r | |
55 | Magnetic tapes are represented as a series of variable records\r | |
56 | of the form:\r | |
57 | \r | |
58 | 32b byte count\r | |
59 | byte 0\r | |
60 | byte 1\r | |
61 | :\r | |
62 | byte n-2\r | |
63 | byte n-1\r | |
64 | 32 byte count\r | |
65 | \r | |
66 | If the byte count is odd, the record is padded with an extra byte\r | |
67 | of junk. File marks are represented by a byte count of 0.\r | |
68 | */\r | |
69 | \r | |
70 | #include "pdp18b_defs.h"\r | |
71 | #include "sim_tape.h"\r | |
72 | \r | |
73 | #define MT_NUMDR 8 /* #drives */\r | |
74 | #define USTAT u3 /* unit status */\r | |
75 | #define MT_MAXFR (1 << 16) /* max record length */\r | |
76 | #define MT_WC 032 /* word count */\r | |
77 | #define MT_CA 033 /* current addr */\r | |
78 | #define WC_SIZE (1 << 12) /* max word count */\r | |
79 | #define WC_MASK (WC_SIZE - 1)\r | |
80 | \r | |
81 | /* Command/unit - mt_cu */\r | |
82 | \r | |
83 | #define CU_V_UNIT 15 /* unit */\r | |
84 | #define CU_M_UNIT 07\r | |
85 | #define CU_PARITY 0040000 /* parity select */\r | |
86 | #define CU_DUMP 0020000 /* dump mode */\r | |
87 | #define CU_ERASE 0010000 /* ext rec gap */\r | |
88 | #define CU_V_CMD 9 /* command */\r | |
89 | #define CU_M_CMD 07\r | |
90 | #define FN_NOP 00\r | |
91 | #define FN_REWIND 01\r | |
92 | #define FN_READ 02\r | |
93 | #define FN_CMPARE 03\r | |
94 | #define FN_WRITE 04\r | |
95 | #define FN_WREOF 05\r | |
96 | #define FN_SPACEF 06\r | |
97 | #define FN_SPACER 07\r | |
98 | #define CU_IE 0000400 /* interrupt enable */\r | |
99 | #define CU_V_TYPE 6 /* drive type */\r | |
100 | #define CU_M_TYPE 03\r | |
101 | #define TY_9TK 3\r | |
102 | #define GET_UNIT(x) (((x) >> CU_V_UNIT) & CU_M_UNIT)\r | |
103 | #define GET_CMD(x) (((x) >> CU_V_CMD) & CU_M_CMD)\r | |
104 | #define GET_TYPE(x) (((x) >> CU_V_TYPE) & CU_M_TYPE)\r | |
105 | #define PACKED(x) (((x) & CU_DUMP) || (GET_TYPE (x) != TY_9TK))\r | |
106 | \r | |
107 | /* Status - stored in mt_sta or (*) uptr->USTAT */\r | |
108 | \r | |
109 | #define STA_ERR 0400000 /* error */\r | |
110 | #define STA_REW 0200000 /* *rewinding */\r | |
111 | #define STA_BOT 0100000 /* *start of tape */\r | |
112 | #define STA_ILL 0040000 /* illegal cmd */\r | |
113 | #define STA_PAR 0020000 /* parity error */\r | |
114 | #define STA_EOF 0010000 /* *end of file */\r | |
115 | #define STA_EOT 0004000 /* *end of tape */\r | |
116 | #define STA_CPE 0002000 /* compare error */\r | |
117 | #define STA_RLE 0001000 /* rec lnt error */\r | |
118 | #define STA_DLT 0000400 /* data late */\r | |
119 | #define STA_BAD 0000200 /* bad tape */\r | |
120 | #define STA_DON 0000100 /* done */\r | |
121 | \r | |
122 | #define STA_CLR 0000077 /* always clear */\r | |
123 | #define STA_DYN (STA_REW | STA_BOT | STA_EOF | STA_EOT)\r | |
124 | /* kept in USTAT */\r | |
125 | \r | |
126 | extern int32 M[];\r | |
127 | extern int32 int_hwre[API_HLVL+1];\r | |
128 | extern UNIT cpu_unit;\r | |
129 | \r | |
130 | int32 mt_cu = 0; /* command/unit */\r | |
131 | int32 mt_sta = 0; /* status register */\r | |
132 | int32 mt_time = 10; /* record latency */\r | |
133 | int32 mt_stopioe = 1; /* stop on error */\r | |
134 | int32 mt_log = 0;\r | |
135 | uint8 *mtxb = NULL; /* transfer buffer */\r | |
136 | \r | |
137 | DEVICE mt_dev;\r | |
138 | int32 mt (int32 dev, int32 pulse, int32 dat);\r | |
139 | int32 mt_iors (void);\r | |
140 | t_stat mt_svc (UNIT *uptr);\r | |
141 | t_stat mt_reset (DEVICE *dptr);\r | |
142 | t_stat mt_attach (UNIT *uptr, char *cptr);\r | |
143 | t_stat mt_detach (UNIT *uptr);\r | |
144 | int32 mt_updcsta (UNIT *uptr, int32 val);\r | |
145 | t_stat mt_map_err (UNIT *uptr, t_stat st);\r | |
146 | UNIT *mt_busy (void);\r | |
147 | \r | |
148 | /* MT data structures\r | |
149 | \r | |
150 | mt_dev MT device descriptor\r | |
151 | mt_unit MT unit list\r | |
152 | mt_reg MT register list\r | |
153 | mt_mod MT modifier list\r | |
154 | */\r | |
155 | \r | |
156 | DIB mt_dib = { DEV_MT, 1, &mt_iors, { &mt } };\r | |
157 | \r | |
158 | UNIT mt_unit[] = {\r | |
159 | { UDATA (&mt_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },\r | |
160 | { UDATA (&mt_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },\r | |
161 | { UDATA (&mt_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },\r | |
162 | { UDATA (&mt_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },\r | |
163 | { UDATA (&mt_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },\r | |
164 | { UDATA (&mt_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },\r | |
165 | { UDATA (&mt_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },\r | |
166 | { UDATA (&mt_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) }\r | |
167 | };\r | |
168 | \r | |
169 | REG mt_reg[] = {\r | |
170 | { ORDATA (STA, mt_sta, 18) },\r | |
171 | { ORDATA (CMD, mt_cu, 18) },\r | |
172 | { ORDATA (WC, M[MT_WC], 18) },\r | |
173 | { ORDATA (CA, M[MT_CA], 18) },\r | |
174 | { FLDATA (INT, int_hwre[API_MTA], INT_V_MTA) },\r | |
175 | { FLDATA (STOP_IOE, mt_stopioe, 0) },\r | |
176 | { DRDATA (TIME, mt_time, 24), PV_LEFT },\r | |
177 | { URDATA (UST, mt_unit[0].USTAT, 8, 16, 0, MT_NUMDR, 0) },\r | |
178 | { URDATA (POS, mt_unit[0].pos, 10, T_ADDR_W, 0,\r | |
179 | MT_NUMDR, PV_LEFT | REG_RO) },\r | |
180 | { FLDATA (LOG, mt_log, 0), REG_HIDDEN },\r | |
181 | { ORDATA (DEVNO, mt_dib.dev, 6), REG_HRO },\r | |
182 | { NULL }\r | |
183 | };\r | |
184 | \r | |
185 | MTAB mt_mod[] = {\r | |
186 | { MTUF_WLK, 0, "write enabled", "WRITEENABLED", NULL },\r | |
187 | { MTUF_WLK, MTUF_WLK, "write locked", "LOCKED", NULL }, \r | |
188 | { MTAB_XTD|MTAB_VUN, 0, "FORMAT", "FORMAT",\r | |
189 | &sim_tape_set_fmt, &sim_tape_show_fmt, NULL },\r | |
190 | { MTAB_XTD|MTAB_VUN, 0, "CAPACITY", "CAPACITY",\r | |
191 | &sim_tape_set_capac, &sim_tape_show_capac, NULL },\r | |
192 | { MTAB_XTD|MTAB_VDV, 0, "DEVNO", "DEVNO",\r | |
193 | &set_devno, &show_devno, NULL },\r | |
194 | { 0 }\r | |
195 | };\r | |
196 | \r | |
197 | DEVICE mt_dev = {\r | |
198 | "MT", mt_unit, mt_reg, mt_mod,\r | |
199 | MT_NUMDR, 10, 31, 1, 8, 8,\r | |
200 | NULL, NULL, &mt_reset,\r | |
201 | NULL, &mt_attach, &mt_detach,\r | |
202 | &mt_dib, DEV_DISABLE\r | |
203 | };\r | |
204 | \r | |
205 | /* IOT routine */\r | |
206 | \r | |
207 | int32 mt (int32 dev, int32 pulse, int32 dat)\r | |
208 | {\r | |
209 | int32 f, sb;\r | |
210 | UNIT *uptr;\r | |
211 | \r | |
212 | uptr = mt_dev.units + GET_UNIT (mt_cu); /* get unit */\r | |
213 | mt_updcsta (uptr, 0); /* update status */\r | |
214 | sb = pulse & 060; /* subop */\r | |
215 | if (pulse & 01) {\r | |
216 | if ((sb == 000) && (uptr->flags & UNIT_ATT) && /* MTTR */\r | |
217 | !sim_is_active (uptr))\r | |
218 | dat = IOT_SKP | dat;\r | |
219 | else if ((sb == 020) && !mt_busy ()) /* MTCR */\r | |
220 | dat = IOT_SKP | dat;\r | |
221 | else if ((sb == 040) && (mt_sta & (STA_ERR | STA_DON))) /* MTSF */\r | |
222 | dat = IOT_SKP | dat;\r | |
223 | }\r | |
224 | if ((pulse & 06) && mt_log)\r | |
225 | printf ("[MT%d: IOT=%o, AC=%o, sta=%o]\n",\r | |
226 | GET_UNIT (mt_cu), 0707300 + pulse, dat, mt_sta);\r | |
227 | if (pulse & 02) {\r | |
228 | if (sb == 000) dat = dat | (mt_cu & 0777700); /* MTRC */\r | |
229 | else if (sb == 020) { /* MTAF, MTLC */\r | |
230 | if (!mt_busy ()) mt_cu = mt_sta = 0; /* if not busy, clr */\r | |
231 | mt_sta = mt_sta & ~(STA_ERR | STA_DON); /* clear flags */\r | |
232 | }\r | |
233 | else if (sb == 040) dat = dat | mt_sta; /* MTRS */\r | |
234 | }\r | |
235 | if (pulse & 04) {\r | |
236 | if (sb == 000) { /* MTGO */\r | |
237 | f = GET_CMD (mt_cu); /* get function */\r | |
238 | if (mt_busy () ||\r | |
239 | sim_is_active (uptr) ||\r | |
240 | (f == FN_NOP) ||\r | |
241 | (((f == FN_SPACER) || (f == FN_REWIND)) && (uptr->USTAT & STA_BOT)) ||\r | |
242 | (((f == FN_WRITE) || (f == FN_WREOF)) && sim_tape_wrp (uptr)) ||\r | |
243 | ((uptr->flags & UNIT_ATT) == 0))\r | |
244 | mt_sta = mt_sta | STA_ILL | STA_ERR; /* set illegal op */\r | |
245 | else {\r | |
246 | if (f == FN_REWIND) uptr->USTAT = STA_REW; /* rewind? */\r | |
247 | else mt_sta = uptr->USTAT = 0; /* no, clear status */\r | |
248 | sim_activate (uptr, mt_time); /* start io */\r | |
249 | }\r | |
250 | }\r | |
251 | if (sb == 020) /* MTCM, MTLC */\r | |
252 | mt_cu = (mt_cu & 0770700) | (dat & 0777700); /* load status */\r | |
253 | }\r | |
254 | mt_updcsta (mt_dev.units + GET_UNIT (mt_cu), 0); /* update status */\r | |
255 | return dat;\r | |
256 | }\r | |
257 | \r | |
258 | /* Unit service\r | |
259 | \r | |
260 | If rewind done, reposition to start of tape, set status\r | |
261 | else, do operation, set done, interrupt\r | |
262 | */\r | |
263 | \r | |
264 | t_stat mt_svc (UNIT *uptr)\r | |
265 | {\r | |
266 | int32 c, c1, c2, c3, f, i, p, u;\r | |
267 | int32 wc, xma;\r | |
268 | t_mtrlnt tbc, cbc;\r | |
269 | t_bool passed_eot;\r | |
270 | t_stat st, r = SCPE_OK;\r | |
271 | \r | |
272 | u = (int32) (uptr - mt_dev.units); /* get unit number */\r | |
273 | f = GET_CMD (mt_cu); /* get command */\r | |
274 | wc = WC_SIZE - (M[MT_WC] & WC_MASK); /* word count is 12b */\r | |
275 | \r | |
276 | if (uptr->USTAT & STA_REW) { /* rewind? */\r | |
277 | sim_tape_rewind (uptr); /* rewind tape */\r | |
278 | if (uptr->flags & UNIT_ATT) uptr->USTAT = STA_BOT;\r | |
279 | else uptr->USTAT = 0;\r | |
280 | if (u == GET_UNIT (mt_cu)) mt_updcsta (uptr, STA_DON);\r | |
281 | if (mt_log) printf ("[MT%d: rewind complete, sta=%o]\n", u, mt_sta);\r | |
282 | return SCPE_OK;\r | |
283 | }\r | |
284 | \r | |
285 | if ((uptr->flags & UNIT_ATT) == 0) { /* if not attached */\r | |
286 | mt_updcsta (uptr, STA_ILL); /* illegal operation */\r | |
287 | return IORETURN (mt_stopioe, SCPE_UNATT);\r | |
288 | }\r | |
289 | \r | |
290 | passed_eot = sim_tape_eot (uptr); /* passed EOT? */\r | |
291 | switch (f) { /* case on function */\r | |
292 | \r | |
293 | case FN_READ: /* read */\r | |
294 | case FN_CMPARE: /* read/compare */\r | |
295 | st = sim_tape_rdrecf (uptr, mtxb, &tbc, MT_MAXFR); /* read rec */\r | |
296 | if (st == MTSE_RECE) mt_sta = mt_sta | STA_PAR | STA_ERR; /* rec in err? */\r | |
297 | else if (st != MTSE_OK) { /* other error? */\r | |
298 | mt_sta = mt_sta | STA_RLE | STA_ERR; /* set RLE flag */\r | |
299 | r = mt_map_err (uptr, st); /* map error */\r | |
300 | break;\r | |
301 | }\r | |
302 | cbc = PACKED (mt_cu)? wc * 3: wc * 2; /* expected bc */\r | |
303 | if (tbc != cbc) mt_sta = mt_sta | STA_RLE | STA_ERR; /* wrong size? */\r | |
304 | if (tbc < cbc) { /* record small? */\r | |
305 | cbc = tbc; /* use smaller */\r | |
306 | wc = PACKED (mt_cu)? ((tbc + 2) / 3): ((tbc + 1) / 2);\r | |
307 | }\r | |
308 | for (i = p = 0; i < wc; i++) { /* copy buffer */\r | |
309 | M[MT_WC] = (M[MT_WC] + 1) & DMASK; /* inc WC, CA */\r | |
310 | M[MT_CA] = (M[MT_CA] + 1) & DMASK;\r | |
311 | xma = M[MT_CA] & AMASK;\r | |
312 | if (PACKED (mt_cu)) { /* packed? */\r | |
313 | c1 = mtxb[p++] & 077;\r | |
314 | c2 = mtxb[p++] & 077;\r | |
315 | c3 = mtxb[p++] & 077;\r | |
316 | c = (c1 << 12) | (c2 << 6) | c3;\r | |
317 | }\r | |
318 | else {\r | |
319 | c1 = mtxb[p++];\r | |
320 | c2 = mtxb[p++];\r | |
321 | c = (c1 << 8) | c2;\r | |
322 | }\r | |
323 | if ((f == FN_READ) && MEM_ADDR_OK (xma)) M[xma] = c;\r | |
324 | else if ((f == FN_CMPARE) && (c != (M[xma] &\r | |
325 | (PACKED (mt_cu)? DMASK: 0177777)))) {\r | |
326 | mt_updcsta (uptr, STA_CPE);\r | |
327 | break;\r | |
328 | }\r | |
329 | } /* end for */\r | |
330 | break;\r | |
331 | \r | |
332 | case FN_WRITE: /* write */\r | |
333 | tbc = PACKED (mt_cu)? wc * 3: wc * 2;\r | |
334 | xma = M[MT_CA] & AMASK; /* get mem addr */\r | |
335 | for (i = p = 0; i < wc; i++) { /* copy buf to tape */\r | |
336 | xma = (xma + 1) & AMASK; /* incr mem addr */\r | |
337 | if (PACKED (mt_cu)) { /* packed? */\r | |
338 | mtxb[p++] = (M[xma] >> 12) & 077;\r | |
339 | mtxb[p++] = (M[xma] >> 6) & 077;\r | |
340 | mtxb[p++] = M[xma] & 077;\r | |
341 | }\r | |
342 | else {\r | |
343 | mtxb[p++] = (M[xma] >> 8) & 0377;\r | |
344 | mtxb[p++] = M[xma] & 0377;\r | |
345 | }\r | |
346 | } /* end for */\r | |
347 | if (st = sim_tape_wrrecf (uptr, mtxb, tbc)) /* write rec, err? */\r | |
348 | r = mt_map_err (uptr, st); /* map error */\r | |
349 | else {\r | |
350 | M[MT_CA] = (M[MT_CA] + wc) & DMASK; /* advance mem addr */\r | |
351 | M[MT_WC] = 0; /* clear word cnt */\r | |
352 | }\r | |
353 | mt_cu = mt_cu & ~CU_ERASE; /* clear erase flag */\r | |
354 | break;\r | |
355 | \r | |
356 | case FN_WREOF:\r | |
357 | if (st = sim_tape_wrtmk (uptr)) /* write tmk, err? */\r | |
358 | r = mt_map_err (uptr, st); /* map error */\r | |
359 | else uptr->USTAT = STA_EOF;\r | |
360 | mt_cu = mt_cu & ~CU_ERASE; /* clear erase flag */\r | |
361 | break;\r | |
362 | \r | |
363 | case FN_SPACEF: /* space forward */\r | |
364 | do {\r | |
365 | M[MT_WC] = (M[MT_WC] + 1) & DMASK; /* inc WC */\r | |
366 | if (st = sim_tape_sprecf (uptr, &tbc)) { /* space rec fwd, err? */\r | |
367 | r = mt_map_err (uptr, st); /* map error */\r | |
368 | break;\r | |
369 | }\r | |
370 | } while ((M[MT_WC] != 0) && (passed_eot || !sim_tape_eot (uptr)));\r | |
371 | break;\r | |
372 | \r | |
373 | case FN_SPACER: /* space reverse */\r | |
374 | do {\r | |
375 | M[MT_WC] = (M[MT_WC] + 1) & DMASK; /* inc WC */\r | |
376 | if (st = sim_tape_sprecr (uptr, &tbc)) { /* space rec rev, err? */\r | |
377 | r = mt_map_err (uptr, st); /* map error */\r | |
378 | break;\r | |
379 | }\r | |
380 | } while (M[MT_WC] != 0);\r | |
381 | break;\r | |
382 | } /* end case */\r | |
383 | \r | |
384 | if (!passed_eot && sim_tape_eot (uptr)) /* just passed EOT? */\r | |
385 | uptr->USTAT = uptr->USTAT | STA_EOT;\r | |
386 | mt_updcsta (uptr, STA_DON); /* set done */\r | |
387 | if (mt_log) printf ("MT%d: fnc=%d done, ma=%o, wc=%o, sta=%o]\n",\r | |
388 | u, f, M[MT_CA], M[MT_WC], mt_sta);\r | |
389 | return r;\r | |
390 | }\r | |
391 | \r | |
392 | /* Update controller status */\r | |
393 | \r | |
394 | int32 mt_updcsta (UNIT *uptr, int32 news)\r | |
395 | {\r | |
396 | mt_sta = (mt_sta & ~(STA_DYN | STA_CLR)) |\r | |
397 | (uptr->USTAT & STA_DYN) | news;\r | |
398 | if ((mt_sta & (STA_ERR | STA_DON)) && (mt_cu & CU_IE))\r | |
399 | SET_INT (MTA);\r | |
400 | else CLR_INT (MTA); /* int request */\r | |
401 | return mt_sta;\r | |
402 | }\r | |
403 | \r | |
404 | /* Test if controller busy */\r | |
405 | \r | |
406 | UNIT *mt_busy (void)\r | |
407 | {\r | |
408 | int32 u;\r | |
409 | UNIT *uptr;\r | |
410 | \r | |
411 | for (u = 0; u < MT_NUMDR; u++) { /* loop thru units */\r | |
412 | uptr = mt_dev.units + u;\r | |
413 | if (sim_is_active (uptr) && ((uptr->USTAT & STA_REW) == 0))\r | |
414 | return uptr;\r | |
415 | }\r | |
416 | return NULL;\r | |
417 | }\r | |
418 | \r | |
419 | /* Map tape error status */\r | |
420 | \r | |
421 | t_stat mt_map_err (UNIT *uptr, t_stat st)\r | |
422 | {\r | |
423 | switch (st) {\r | |
424 | \r | |
425 | case MTSE_FMT: /* illegal fmt */\r | |
426 | case MTSE_UNATT: /* not attached */\r | |
427 | mt_sta = mt_sta | STA_ILL | STA_ERR;\r | |
428 | case MTSE_OK: /* no error */\r | |
429 | return SCPE_IERR;\r | |
430 | \r | |
431 | case MTSE_TMK: /* end of file */\r | |
432 | uptr->USTAT = uptr->USTAT | STA_EOF; /* set EOF */\r | |
433 | mt_sta = mt_sta | STA_ERR;\r | |
434 | break;\r | |
435 | \r | |
436 | case MTSE_IOERR: /* IO error */\r | |
437 | mt_sta = mt_sta | STA_PAR | STA_ERR; /* set par err */\r | |
438 | if (mt_stopioe) return SCPE_IOERR;\r | |
439 | break;\r | |
440 | \r | |
441 | case MTSE_INVRL: /* invalid rec lnt */\r | |
442 | mt_sta = mt_sta | STA_PAR | STA_ERR; /* set par err */\r | |
443 | return SCPE_MTRLNT;\r | |
444 | \r | |
445 | case MTSE_RECE: /* record in error */\r | |
446 | mt_sta = mt_sta | STA_PAR | STA_ERR; /* set par err */\r | |
447 | break;\r | |
448 | \r | |
449 | case MTSE_EOM: /* end of medium */\r | |
450 | mt_sta = mt_sta | STA_BAD | STA_ERR; /* set end tape */\r | |
451 | break;\r | |
452 | \r | |
453 | case MTSE_BOT: /* reverse into BOT */\r | |
454 | uptr->USTAT = uptr->USTAT | STA_BOT; /* set status */\r | |
455 | mt_sta = mt_sta | STA_ERR;\r | |
456 | break;\r | |
457 | \r | |
458 | case MTSE_WRP: /* write protect */\r | |
459 | mt_sta = mt_sta | STA_ILL | STA_ERR; /* illegal operation */\r | |
460 | break;\r | |
461 | }\r | |
462 | \r | |
463 | return SCPE_OK;\r | |
464 | }\r | |
465 | \r | |
466 | /* Reset routine */\r | |
467 | \r | |
468 | t_stat mt_reset (DEVICE *dptr)\r | |
469 | {\r | |
470 | int32 u;\r | |
471 | UNIT *uptr;\r | |
472 | \r | |
473 | mt_cu = mt_sta = 0;\r | |
474 | for (u = 0; u < MT_NUMDR; u++) { /* loop thru units */\r | |
475 | uptr = mt_dev.units + u;\r | |
476 | sim_tape_reset (uptr); /* reset tape */\r | |
477 | sim_cancel (uptr); /* cancel activity */\r | |
478 | if (uptr->flags & UNIT_ATT) uptr->USTAT = STA_BOT;\r | |
479 | else uptr->USTAT = 0;\r | |
480 | }\r | |
481 | mt_updcsta (&mt_unit[0], 0); /* update status */\r | |
482 | if (mtxb == NULL) mtxb = (uint8 *) calloc (MT_MAXFR, sizeof (uint8));\r | |
483 | if (mtxb == NULL) return SCPE_MEM;\r | |
484 | return SCPE_OK;\r | |
485 | }\r | |
486 | \r | |
487 | /* IORS routine */\r | |
488 | \r | |
489 | int32 mt_iors (void)\r | |
490 | {\r | |
491 | return (mt_sta & (STA_ERR | STA_DON))? IOS_MTA: 0;\r | |
492 | }\r | |
493 | \r | |
494 | /* Attach routine */\r | |
495 | \r | |
496 | t_stat mt_attach (UNIT *uptr, char *cptr)\r | |
497 | {\r | |
498 | t_stat r;\r | |
499 | \r | |
500 | r = sim_tape_attach (uptr, cptr);\r | |
501 | if (r != SCPE_OK) return r;\r | |
502 | uptr->USTAT = STA_BOT;\r | |
503 | mt_updcsta (mt_dev.units + GET_UNIT (mt_cu), 0); /* update status */\r | |
504 | return r;\r | |
505 | }\r | |
506 | \r | |
507 | /* Detach routine */\r | |
508 | \r | |
509 | t_stat mt_detach (UNIT* uptr)\r | |
510 | {\r | |
511 | if (!(uptr->flags & UNIT_ATT)) return SCPE_OK; /* attached? */\r | |
512 | if (!sim_is_active (uptr)) uptr->USTAT = 0;\r | |
513 | mt_updcsta (mt_dev.units + GET_UNIT (mt_cu), 0); /* update status */\r | |
514 | return sim_tape_detach (uptr);\r | |
515 | }\r |