1 /* pdp1_dt.c: 18b DECtape simulator
3 Copyright (c) 1993-2006, Robert M Supnik
5 Permission is hereby granted, free of charge, to any person obtaining a
6 copy of this software and associated documentation files (the "Software"),
7 to deal in the Software without restriction, including without limitation
8 the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 and/or sell copies of the Software, and to permit persons to whom the
10 Software is furnished to do so, subject to the following conditions:
12 The above copyright notice and this permission notice shall be included in
13 all copies or substantial portions of the Software.
15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 Except as contained in this notice, the name of Robert M Supnik shall not be
23 used in advertising or otherwise to promote the sale, use or other dealings
24 in this Software without prior written authorization from Robert M Supnik.
26 dt Type 550/555 DECtape
28 21-Dec-06 RMS Added 16-channel SBS support
29 23-Jun-06 RMS Fixed conflict in ATTACH switches
31 16-Aug-05 RMS Fixed C++ declaration and cast problems
32 25-Jan-04 RMS Revised for device debug support
33 09-Jan-04 RMS Changed sim_fsize calling sequence, added STOP_OFFR
34 26-Oct-03 RMS Cleaned up buffer copy code
35 18-Oct-03 RMS Added DECtape off reel message, simplified timing
36 25-Apr-03 RMS Revised for extended file support
37 14-Mar-03 RMS Fixed variable size interaction with save/restore
38 17-Oct-02 RMS Fixed bug in end of reel logic
39 06-Oct-02 RMS Added device disable support
40 13-Aug-02 RMS Cloned from pdp18b_dt.c
42 18b DECtapes are represented in memory by fixed length buffer of 32b words.
43 Three file formats are supported:
45 18b/36b 256 words per block [256 x 18b]
46 16b 256 words per block [256 x 16b]
47 12b 129 words per block [129 x 12b]
49 When a 16b or 12b DECtape file is read in, it is converted to 18b/36b format.
51 DECtape motion is measured in 3b lines. Time between lines is 33.33us.
52 Tape density is nominally 300 lines per inch. The format of a DECtape (as
53 taken from the TD8E formatter) is:
55 reverse end zone 8192 reverse end zone codes ~ 10 feet
56 reverse buffer 200 interblock codes
60 forward buffer 200 interblock codes
61 forward end zone 8192 forward end zone codes ~ 10 feet
63 A block consists of five 18b header words, a tape-specific number of data
64 words, and five 18b trailer words. All systems except the PDP-8 use a
65 standard block length of 256 words; the PDP-8 uses a standard block length
66 of 86 words (x 18b = 129 words x 12b).
68 Because a DECtape file only contains data, the simulator cannot support
69 write timing and mark track and can only do a limited implementation
70 of read all and write all. Read all assumes that the tape has been
71 conventionally written forward:
74 header word 1 block number (for forward reads)
76 header word 4 checksum (for reverse reads)
78 trailer word 4 checksum (for forward reads)
80 trailer word 1 block number (for reverse reads)
83 Write all writes only the data words and dumps the interblock words in the
86 The Type 550 controller has a 4b unit select field, for units 1-8. The code
87 assumes that the GETUNIT macro returns a unit number in the range of 0-7,
88 with 8 represented as 0, and an invalid unit as -1.
91 #include "pdp1_defs.h"
93 #define DT_NUMDR 8 /* #drives */
94 #define UNIT_V_WLK (UNIT_V_UF + 0) /* write locked */
95 #define UNIT_V_8FMT (UNIT_V_UF + 1) /* 12b format */
96 #define UNIT_V_11FMT (UNIT_V_UF + 2) /* 16b format */
97 #define UNIT_WLK (1 << UNIT_V_WLK)
98 #define UNIT_8FMT (1 << UNIT_V_8FMT)
99 #define UNIT_11FMT (1 << UNIT_V_11FMT)
100 #define STATE u3 /* unit state */
101 #define LASTT u4 /* last time update */
102 #define DT_WC 030 /* word count */
103 #define DT_CA 031 /* current addr */
104 #define UNIT_WPRT (UNIT_WLK | UNIT_RO) /* write protect */
106 /* System independent DECtape constants */
108 #define DT_LPERMC 6 /* lines per mark track */
109 #define DT_BLKWD 1 /* blk no word in h/t */
110 #define DT_CSMWD 4 /* checksum word in h/t */
111 #define DT_HTWRD 5 /* header/trailer words */
112 #define DT_EZLIN (8192 * DT_LPERMC) /* end zone length */
113 #define DT_BFLIN (200 * DT_LPERMC) /* buffer length */
114 #define DT_BLKLN (DT_BLKWD * DT_LPERMC) /* blk no line in h/t */
115 #define DT_CSMLN (DT_CSMWD * DT_LPERMC) /* csum line in h/t */
116 #define DT_HTLIN (DT_HTWRD * DT_LPERMC) /* header/trailer lines */
118 /* 16b, 18b, 36b DECtape constants */
120 #define D18_WSIZE 6 /* word size in lines */
121 #define D18_BSIZE 256 /* block size in 18b */
122 #define D18_TSIZE 578 /* tape size */
123 #define D18_LPERB (DT_HTLIN + (D18_BSIZE * DT_WSIZE) + DT_HTLIN)
124 #define D18_FWDEZ (DT_EZLIN + (D18_LPERB * D18_TSIZE))
125 #define D18_CAPAC (D18_TSIZE * D18_BSIZE) /* tape capacity */
126 #define D11_FILSIZ (D18_CAPAC * sizeof (int16))
128 /* 12b DECtape constants */
130 #define D8_WSIZE 4 /* word size in lines */
131 #define D8_BSIZE 86 /* block size in 18b */
132 #define D8_TSIZE 1474 /* tape size */
133 #define D8_LPERB (DT_HTLIN + (D8_BSIZE * DT_WSIZE) + DT_HTLIN)
134 #define D8_FWDEZ (DT_EZLIN + (D8_LPERB * D8_TSIZE))
135 #define D8_CAPAC (D8_TSIZE * D8_BSIZE) /* tape capacity */
137 #define D8_NBSIZE ((D8_BSIZE * D18_WSIZE) / D8_WSIZE)
138 #define D8_FILSIZ (D8_NBSIZE * D8_TSIZE * sizeof (int16))
140 /* This controller */
142 #define DT_CAPAC D18_CAPAC /* default */
143 #define DT_WSIZE D18_WSIZE
145 /* Calculated constants, per unit */
147 #define DTU_BSIZE(u) (((u)->flags & UNIT_8FMT)? D8_BSIZE: D18_BSIZE)
148 #define DTU_TSIZE(u) (((u)->flags & UNIT_8FMT)? D8_TSIZE: D18_TSIZE)
149 #define DTU_LPERB(u) (((u)->flags & UNIT_8FMT)? D8_LPERB: D18_LPERB)
150 #define DTU_FWDEZ(u) (((u)->flags & UNIT_8FMT)? D8_FWDEZ: D18_FWDEZ)
151 #define DTU_CAPAC(u) (((u)->flags & UNIT_8FMT)? D8_CAPAC: D18_CAPAC)
153 #define DT_LIN2BL(p,u) (((p) - DT_EZLIN) / DTU_LPERB (u))
154 #define DT_LIN2OF(p,u) (((p) - DT_EZLIN) % DTU_LPERB (u))
155 #define DT_LIN2WD(p,u) ((DT_LIN2OF (p,u) - DT_HTLIN) / DT_WSIZE)
156 #define DT_BLK2LN(p,u) (((p) * DTU_LPERB (u)) + DT_EZLIN)
157 #define DT_QREZ(u) (((u)->pos) < DT_EZLIN)
158 #define DT_QFEZ(u) (((u)->pos) >= ((uint32) DTU_FWDEZ (u)))
159 #define DT_QEZ(u) (DT_QREZ (u) || DT_QFEZ (u))
161 /* Status register A */
163 #define DTA_V_UNIT 12 /* unit select */
164 #define DTA_M_UNIT 017
165 #define DTA_UNIT (DTA_M_UNIT << DTA_V_UNIT)
166 #define DTA_V_MOT 4 /* motion */
168 #define DTA_V_FNC 0 /* function */
170 #define FNC_MOVE 00 /* move */
171 #define FNC_SRCH 01 /* search */
172 #define FNC_READ 02 /* read */
173 #define FNC_WRIT 03 /* write */
174 #define FNC_RALL 05 /* read all */
175 #define FNC_WALL 06 /* write all */
176 #define FNC_WMRK 07 /* write timing */
177 #define DTA_STSTP (1u << (DTA_V_MOT + 1))
178 #define DTA_FWDRV (1u << DTA_V_MOT)
179 #define DTA_MODE 0 /* not implemented */
181 #define DTA_GETUNIT(x) map_unit[(((x) >> DTA_V_UNIT) & DTA_M_UNIT)]
182 #define DT_UPDINT if (dtsb & (DTB_DTF | DTB_BEF | DTB_ERF)) \
183 dev_req_int (dt_sbs);
185 #define DTA_GETMOT(x) (((x) >> DTA_V_MOT) & DTA_M_MOT)
186 #define DTA_GETFNC(x) (((x) >> DTA_V_FNC) & DTA_M_FNC)
188 /* Status register B */
190 #define DTB_V_DTF 17 /* data flag */
191 #define DTB_V_BEF 16 /* block end flag */
192 #define DTB_V_ERF 15 /* error flag */
193 #define DTB_V_END 14 /* end of tape */
194 #define DTB_V_TIM 13 /* timing err */
195 #define DTB_V_REV 12 /* reverse */
196 #define DTB_V_GO 11 /* go */
197 #define DTB_V_MRK 10 /* mark trk err */
198 #define DTB_V_SEL 9 /* select err */
199 #define DTB_DTF (1u << DTB_V_DTF)
200 #define DTB_BEF (1u << DTB_V_BEF)
201 #define DTB_ERF (1u << DTB_V_ERF)
202 #define DTB_END (1u << DTB_V_END)
203 #define DTB_TIM (1u << DTB_V_TIM)
204 #define DTB_REV (1u << DTB_V_REV)
205 #define DTB_GO (1u << DTB_V_GO)
206 #define DTB_MRK (1u << DTB_V_MRK)
207 #define DTB_SEL (1u << DTB_V_SEL)
208 #define DTB_ALLERR (DTB_END | DTB_TIM | DTB_MRK | DTB_SEL)
212 #define DTS_V_MOT 3 /* motion */
214 #define DTS_STOP 0 /* stopped */
215 #define DTS_DECF 2 /* decel, fwd */
216 #define DTS_DECR 3 /* decel, rev */
217 #define DTS_ACCF 4 /* accel, fwd */
218 #define DTS_ACCR 5 /* accel, rev */
219 #define DTS_ATSF 6 /* @speed, fwd */
220 #define DTS_ATSR 7 /* @speed, rev */
221 #define DTS_DIR 01 /* dir mask */
222 #define DTS_V_FNC 0 /* function */
224 #define DTS_OFR 7 /* "off reel" */
225 #define DTS_GETMOT(x) (((x) >> DTS_V_MOT) & DTS_M_MOT)
226 #define DTS_GETFNC(x) (((x) >> DTS_V_FNC) & DTS_M_FNC)
227 #define DTS_V_2ND 6 /* next state */
228 #define DTS_V_3RD (DTS_V_2ND + DTS_V_2ND) /* next next */
229 #define DTS_STA(y,z) (((y) << DTS_V_MOT) | ((z) << DTS_V_FNC))
230 #define DTS_SETSTA(y,z) uptr->STATE = DTS_STA (y, z)
231 #define DTS_SET2ND(y,z) uptr->STATE = (uptr->STATE & 077) | \
232 ((DTS_STA (y, z)) << DTS_V_2ND)
233 #define DTS_SET3RD(y,z) uptr->STATE = (uptr->STATE & 07777) | \
234 ((DTS_STA (y, z)) << DTS_V_3RD)
235 #define DTS_NXTSTA(x) (x >> DTS_V_2ND)
237 /* Operation substates */
239 #define DTO_WCO 1 /* wc overflow */
240 #define DTO_SOB 2 /* start of block */
244 #define LOG_MS 001 /* move, search */
245 #define LOG_RW 002 /* read write */
246 #define LOG_BL 004 /* block # lblk */
248 #define ABS(x) (((x) < 0)? (-(x)): (x))
251 extern int32 stop_inst
;
252 extern UNIT cpu_unit
;
253 extern int32 sim_switches
;
254 extern int32 sim_is_running
;
255 extern FILE *sim_deb
;
257 int32 dtsa
= 0; /* status A */
258 int32 dtsb
= 0; /* status B */
259 int32 dtdb
= 0; /* data buffer */
260 int32 dt_sbs
= 0; /* SBS level */
261 int32 dt_ltime
= 12; /* interline time */
262 int32 dt_dctime
= 40000; /* decel time */
263 int32 dt_substate
= 0;
265 int32 dt_stopoffr
= 0;
266 static const int32 map_unit
[16] = { /* Type 550 unit map */
267 -1, 1, 2, 3, 4, 5, 6, 7,
268 0, -1, -1, -1, -1, -1, -1, -1
271 t_stat
dt_svc (UNIT
*uptr
);
272 t_stat
dt_reset (DEVICE
*dptr
);
273 t_stat
dt_attach (UNIT
*uptr
, char *cptr
);
274 t_stat
dt_detach (UNIT
*uptr
);
275 void dt_deselect (int32 oldf
);
276 void dt_newsa (int32 newf
);
277 void dt_newfnc (UNIT
*uptr
, int32 newsta
);
278 t_bool
dt_setpos (UNIT
*uptr
);
279 void dt_schedez (UNIT
*uptr
, int32 dir
);
280 void dt_seterr (UNIT
*uptr
, int32 e
);
281 int32
dt_comobv (int32 val
);
282 int32
dt_csum (UNIT
*uptr
, int32 blk
);
283 int32
dt_gethdr (UNIT
*uptr
, int32 blk
, int32 relpos
);
285 /* DT data structures
287 dt_dev DT device descriptor
289 dt_reg DT register list
290 dt_mod DT modifier list
294 { UDATA (&dt_svc
, UNIT_FIX
+UNIT_ATTABLE
+UNIT_DISABLE
+
295 UNIT_ROABLE
, DT_CAPAC
) },
296 { UDATA (&dt_svc
, UNIT_FIX
+UNIT_ATTABLE
+UNIT_DISABLE
+
297 UNIT_ROABLE
, DT_CAPAC
) },
298 { UDATA (&dt_svc
, UNIT_FIX
+UNIT_ATTABLE
+UNIT_DISABLE
+
299 UNIT_ROABLE
, DT_CAPAC
) },
300 { UDATA (&dt_svc
, UNIT_FIX
+UNIT_ATTABLE
+UNIT_DISABLE
+
301 UNIT_ROABLE
, DT_CAPAC
) },
302 { UDATA (&dt_svc
, UNIT_FIX
+UNIT_ATTABLE
+UNIT_DISABLE
+
303 UNIT_ROABLE
, DT_CAPAC
) },
304 { UDATA (&dt_svc
, UNIT_FIX
+UNIT_ATTABLE
+UNIT_DISABLE
+
305 UNIT_ROABLE
, DT_CAPAC
) },
306 { UDATA (&dt_svc
, UNIT_FIX
+UNIT_ATTABLE
+UNIT_DISABLE
+
307 UNIT_ROABLE
, DT_CAPAC
) },
308 { UDATA (&dt_svc
, UNIT_FIX
+UNIT_ATTABLE
+UNIT_DISABLE
+
309 UNIT_ROABLE
, DT_CAPAC
) }
313 { ORDATA (DTSA
, dtsa
, 18) },
314 { ORDATA (DTSB
, dtsb
, 18) },
315 { ORDATA (DTDB
, dtdb
, 18) },
316 { FLDATA (DTF
, dtsb
, DTB_V_DTF
) },
317 { FLDATA (BEF
, dtsb
, DTB_V_BEF
) },
318 { FLDATA (ERF
, dtsb
, DTB_V_ERF
) },
319 { DRDATA (LTIME
, dt_ltime
, 31), REG_NZ
},
320 { DRDATA (DCTIME
, dt_dctime
, 31), REG_NZ
},
321 { ORDATA (SUBSTATE
, dt_substate
, 2) },
322 { DRDATA (LBLK
, dt_logblk
, 12), REG_HIDDEN
},
323 { URDATA (POS
, dt_unit
[0].pos
, 10, T_ADDR_W
, 0,
324 DT_NUMDR
, PV_LEFT
| REG_RO
) },
325 { URDATA (STATT
, dt_unit
[0].STATE
, 8, 18, 0,
327 { URDATA (LASTT
, dt_unit
[0].LASTT
, 10, 32, 0,
328 DT_NUMDR
, REG_HRO
) },
329 { FLDATA (STOP_OFFR
, dt_stopoffr
, 0) },
330 { DRDATA (SBSLVL
, dt_sbs
, 4), REG_HRO
},
335 { MTAB_XTD
|MTAB_VDV
, 0, "SBSLVL", "SBSLVL",
336 &dev_set_sbs
, &dev_show_sbs
, (void *) &dt_sbs
},
337 { UNIT_WLK
, 0, "write enabled", "WRITEENABLED", NULL
},
338 { UNIT_WLK
, UNIT_WLK
, "write locked", "LOCKED", NULL
},
339 { UNIT_8FMT
+ UNIT_11FMT
, 0, "18b", NULL
, NULL
},
340 { UNIT_8FMT
+ UNIT_11FMT
, UNIT_8FMT
, "12b", NULL
, NULL
},
341 { UNIT_8FMT
+ UNIT_11FMT
, UNIT_11FMT
, "16b", NULL
, NULL
},
346 { "MOTION", LOG_MS
},
353 "DT", dt_unit
, dt_reg
, dt_mod
,
354 DT_NUMDR
, 8, 24, 1, 8, 18,
355 NULL
, NULL
, &dt_reset
,
356 NULL
, &dt_attach
, &dt_detach
,
357 NULL
, DEV_DISABLE
| DEV_DEBUG
, 0,
363 int32
dt (int32 IR
, int32 dev
, int32 dat
)
365 int32 pulse
= (IR
>> 6) & 037;
366 int32 fnc
, mot
, unum
;
369 if (dt_dev
.flags
& DEV_DIS
) /* disabled? */
370 return (stop_inst
<< IOT_V_REASON
) | dat
; /* stop if requested */
371 unum
= DTA_GETUNIT (dtsa
); /* get unit no */
372 if (unum
>= 0) uptr
= dt_dev
.units
+ unum
; /* get unit */
374 if (pulse
== 003) { /* MSE */
375 if ((dtsa
^ dat
) & DTA_UNIT
) dt_deselect (dtsa
); /* new unit? */
376 dtsa
= (dtsa
& ~DTA_UNIT
) | (dat
& DTA_UNIT
);
377 dtsb
= dtsb
& ~(DTB_DTF
| DTB_BEF
| DTB_ERF
| DTB_ALLERR
);
379 if (pulse
== 004) { /* MLC */
380 dtsa
= (dtsa
& ~DTA_RW
) | (dat
& DTA_RW
); /* load dtsa */
381 dtsb
= dtsb
& ~(DTB_DTF
| DTB_BEF
| DTB_ERF
| DTB_ALLERR
);
382 fnc
= DTA_GETFNC (dtsa
); /* get fnc */
383 if ((uptr
== NULL
) || /* invalid? */
384 ((uptr
->flags
) & UNIT_DIS
) || /* disabled? */
385 (fnc
>= FNC_WMRK
) || /* write mark? */
386 ((fnc
== FNC_WRIT
) && (uptr
->flags
& UNIT_WLK
)) ||
387 ((fnc
== FNC_WALL
) && (uptr
->flags
& UNIT_WLK
)))
388 dt_seterr (uptr
, DTB_SEL
); /* select err */
389 else dt_newsa (dtsa
);
391 if (pulse
== 005) { /* MRD */
392 dat
= (dat
& ~DMASK
) | dtdb
;
393 dtsb
= dtsb
& ~(DTB_DTF
| DTB_BEF
);
395 if (pulse
== 006) { /* MWR */
397 dtsb
= dtsb
& ~(DTB_DTF
| DTB_BEF
);
399 if (pulse
== 007) { /* MRS */
400 dtsb
= dtsb
& ~(DTB_REV
| DTB_GO
); /* clr rev, go */
401 if (uptr
) { /* valid unit? */
402 mot
= DTS_GETMOT (uptr
->STATE
); /* get motion */
403 if (mot
& DTS_DIR
) dtsb
= dtsb
| DTB_REV
; /* rev? set */
404 if ((mot
>= DTS_ACCF
) || (uptr
->STATE
& 0777700))
405 dtsb
= dtsb
| DTB_GO
; /* accel? go */
407 dat
= (dat
& ~DMASK
) | dtsb
;
415 void dt_deselect (int32 oldf
)
417 int32 old_unit
, old_mot
;
420 old_unit
= DTA_GETUNIT (oldf
); /* get unit no */
421 if (old_unit
< 0) return; /* invalid? */
422 uptr
= dt_dev
.units
+ old_unit
; /* get unit */
423 old_mot
= DTS_GETMOT (uptr
->STATE
);
424 if (old_mot
>= DTS_ATSF
) /* at speed? */
425 dt_newfnc (uptr
, DTS_STA (old_mot
, DTS_OFR
));
426 else if (old_mot
>= DTS_ACCF
) /* accelerating? */
427 DTS_SET2ND (DTS_ATSF
| (old_mot
& DTS_DIR
), DTS_OFR
);
431 /* Command register change
433 1. If change in motion, stop to start
434 - schedule acceleration
435 - set function as next state
436 2. If change in motion, start to stop
437 - if not already decelerating (could be reversing),
438 schedule deceleration
439 3. If change in direction,
440 - if not decelerating, schedule deceleration
441 - set accelerating (other dir) as next state
442 - set function as next next state
443 4. If not accelerating or at speed,
444 - schedule acceleration
445 - set function as next state
446 5. If not yet at speed,
447 - set function as next state
449 - set function as current state, schedule function
452 void dt_newsa (int32 newf
)
454 int32 new_unit
, prev_mot
, new_fnc
;
455 int32 prev_mving
, new_mving
, prev_dir
, new_dir
;
458 new_unit
= DTA_GETUNIT (newf
); /* new unit */
459 if (new_unit
< 0) return; /* invalid? */
460 uptr
= dt_dev
.units
+ new_unit
;
461 if ((uptr
->flags
& UNIT_ATT
) == 0) { /* new unit attached? */
462 dt_seterr (uptr
, DTB_SEL
); /* no, error */
465 prev_mot
= DTS_GETMOT (uptr
->STATE
); /* previous motion */
466 prev_mving
= prev_mot
!= DTS_STOP
; /* previous moving? */
467 prev_dir
= prev_mot
& DTS_DIR
; /* previous dir? */
468 new_mving
= (newf
& DTA_STSTP
) != 0; /* new moving? */
469 new_dir
= (newf
& DTA_FWDRV
) != 0; /* new dir? */
470 new_fnc
= DTA_GETFNC (newf
); /* new function? */
472 if ((prev_mving
| new_mving
) == 0) return; /* stop to stop */
474 if (new_mving
& ~prev_mving
) { /* start? */
475 if (dt_setpos (uptr
)) return; /* update pos */
476 sim_cancel (uptr
); /* stop current */
477 sim_activate (uptr
, dt_dctime
- (dt_dctime
>> 2)); /* sched accel */
478 DTS_SETSTA (DTS_ACCF
| new_dir
, 0); /* state = accel */
479 DTS_SET2ND (DTS_ATSF
| new_dir
, new_fnc
); /* next = fnc */
483 if (prev_mving
& ~new_mving
) { /* stop? */
484 if ((prev_mot
& ~DTS_DIR
) != DTS_DECF
) { /* !already stopping? */
485 if (dt_setpos (uptr
)) return; /* update pos */
486 sim_cancel (uptr
); /* stop current */
487 sim_activate (uptr
, dt_dctime
); /* schedule decel */
489 DTS_SETSTA (DTS_DECF
| prev_dir
, 0); /* state = decel */
493 if (prev_dir
^ new_dir
) { /* dir chg? */
494 if ((prev_mot
& ~DTS_DIR
) != DTS_DECF
) { /* !already stopping? */
495 if (dt_setpos (uptr
)) return; /* update pos */
496 sim_cancel (uptr
); /* stop current */
497 sim_activate (uptr
, dt_dctime
); /* schedule decel */
499 DTS_SETSTA (DTS_DECF
| prev_dir
, 0); /* state = decel */
500 DTS_SET2ND (DTS_ACCF
| new_dir
, 0); /* next = accel */
501 DTS_SET3RD (DTS_ATSF
| new_dir
, new_fnc
); /* next next = fnc */
505 if (prev_mot
< DTS_ACCF
) { /* not accel/at speed? */
506 if (dt_setpos (uptr
)) return; /* update pos */
507 sim_cancel (uptr
); /* cancel cur */
508 sim_activate (uptr
, dt_dctime
- (dt_dctime
>> 2)); /* sched accel */
509 DTS_SETSTA (DTS_ACCF
| new_dir
, 0); /* state = accel */
510 DTS_SET2ND (DTS_ATSF
| new_dir
, new_fnc
); /* next = fnc */
514 if (prev_mot
< DTS_ATSF
) { /* not at speed? */
515 DTS_SET2ND (DTS_ATSF
| new_dir
, new_fnc
); /* next = fnc */
519 dt_newfnc (uptr
, DTS_STA (DTS_ATSF
| new_dir
, new_fnc
));/* state = fnc */
523 /* Schedule new DECtape function
525 This routine is only called if
526 - the selected unit is attached
527 - the selected unit is at speed (forward or backward)
530 - updates the selected unit's position
531 - updates the selected unit's state
532 - schedules the new operation
535 void dt_newfnc (UNIT
*uptr
, int32 newsta
)
537 int32 fnc
, dir
, blk
, unum
, newpos
;
540 oldpos
= uptr
->pos
; /* save old pos */
541 if (dt_setpos (uptr
)) return; /* update pos */
542 uptr
->STATE
= newsta
; /* update state */
543 fnc
= DTS_GETFNC (uptr
->STATE
); /* set variables */
544 dir
= DTS_GETMOT (uptr
->STATE
) & DTS_DIR
;
545 unum
= (int32
) (uptr
- dt_dev
.units
);
546 if (oldpos
== uptr
->pos
) /* bump pos */
547 uptr
->pos
= uptr
->pos
+ (dir
? -1: 1);
548 blk
= DT_LIN2BL (uptr
->pos
, uptr
);
550 if (dir
? DT_QREZ (uptr
): DT_QFEZ (uptr
)) { /* wrong ez? */
551 dt_seterr (uptr
, DTB_END
); /* set ez flag, stop */
554 sim_cancel (uptr
); /* cancel cur op */
555 dt_substate
= DTO_SOB
; /* substate = block start */
556 switch (fnc
) { /* case function */
558 case DTS_OFR
: /* off reel */
559 if (dir
) newpos
= -1000; /* rev? < start */
560 else newpos
= DTU_FWDEZ (uptr
) + DT_EZLIN
+ 1000; /* fwd? > end */
563 case FNC_MOVE
: /* move */
564 dt_schedez (uptr
, dir
); /* sched end zone */
565 if (DEBUG_PRI (dt_dev
, LOG_MS
)) fprintf (sim_deb
, ">>DT%d: moving %s\n", unum
, (dir
?
566 "backward": "forward"));
569 case FNC_SRCH
: /* search */
570 if (dir
) newpos
= DT_BLK2LN ((DT_QFEZ (uptr
)?
571 DTU_TSIZE (uptr
): blk
), uptr
) - DT_BLKLN
- DT_WSIZE
;
572 else newpos
= DT_BLK2LN ((DT_QREZ (uptr
)?
573 0: blk
+ 1), uptr
) + DT_BLKLN
+ (DT_WSIZE
- 1);
574 if (DEBUG_PRI (dt_dev
, LOG_MS
)) fprintf (sim_deb
, ">>DT%d: searching %s\n", unum
,
575 (dir
? "backward": "forward"));
578 case FNC_WRIT
: /* write */
579 case FNC_READ
: /* read */
580 case FNC_RALL
: /* read all */
581 case FNC_WALL
: /* write all */
582 if (DT_QEZ (uptr
)) { /* in "ok" end zone? */
583 if (dir
) newpos
= DTU_FWDEZ (uptr
) - DT_WSIZE
;
584 else newpos
= DT_EZLIN
+ (DT_WSIZE
- 1);
587 newpos
= ((uptr
->pos
) / DT_WSIZE
) * DT_WSIZE
;
588 if (!dir
) newpos
= newpos
+ (DT_WSIZE
- 1);
590 if (DEBUG_PRI (dt_dev
, LOG_RW
) ||
591 (DEBUG_PRI (dt_dev
, LOG_BL
) && (blk
== dt_logblk
)))
592 fprintf (sim_deb
, ">>DT%d: read all block %d %s%s\n",
593 unum
, blk
, (dir
? "backward": "forward"),
594 ((dtsa
& DTA_MODE
)? " continuous": " "));
598 dt_seterr (uptr
, DTB_SEL
); /* bad state */
602 if ((fnc
== FNC_WRIT
) || (fnc
== FNC_WALL
)) { /* write function? */
603 dtsb
= dtsb
| DTB_DTF
; /* set data flag */
606 sim_activate (uptr
, ABS (newpos
- ((int32
) uptr
->pos
)) * dt_ltime
);
610 /* Update DECtape position
612 DECtape motion is modeled as a constant velocity, with linear
613 acceleration and deceleration. The motion equations are as follows:
615 t = time since operation started
616 tmax = time for operation (accel, decel only)
617 v = at speed velocity in lines (= 1/dt_ltime)
620 at speed dist = t * v
621 accel dist = (t^2 * v) / (2 * tmax)
622 decel dist = (((2 * t * tmax) - t^2) * v) / (2 * tmax)
624 This routine uses the relative (integer) time, rather than the absolute
625 (floating point) time, to allow save and restore of the start times.
628 t_bool
dt_setpos (UNIT
*uptr
)
630 uint32 new_time
, ut
, ulin
, udelt
;
631 int32 mot
= DTS_GETMOT (uptr
->STATE
);
634 new_time
= sim_grtime (); /* current time */
635 ut
= new_time
- uptr
->LASTT
; /* elapsed time */
636 if (ut
== 0) return FALSE
; /* no time gone? exit */
637 uptr
->LASTT
= new_time
; /* update last time */
638 switch (mot
& ~DTS_DIR
) { /* case on motion */
640 case DTS_STOP
: /* stop */
644 case DTS_DECF
: /* slowing */
645 ulin
= ut
/ (uint32
) dt_ltime
;
646 udelt
= dt_dctime
/ dt_ltime
;
647 delta
= ((ulin
* udelt
* 2) - (ulin
* ulin
)) / (2 * udelt
);
650 case DTS_ACCF
: /* accelerating */
651 ulin
= ut
/ (uint32
) dt_ltime
;
652 udelt
= (dt_dctime
- (dt_dctime
>> 2)) / dt_ltime
;
653 delta
= (ulin
* ulin
) / (2 * udelt
);
656 case DTS_ATSF
: /* at speed */
657 delta
= ut
/ (uint32
) dt_ltime
;
661 if (mot
& DTS_DIR
) uptr
->pos
= uptr
->pos
- delta
; /* update pos */
662 else uptr
->pos
= uptr
->pos
+ delta
;
663 if (((int32
) uptr
->pos
< 0) ||
664 ((int32
) uptr
->pos
> (DTU_FWDEZ (uptr
) + DT_EZLIN
))) {
665 detach_unit (uptr
); /* off reel? */
666 uptr
->STATE
= uptr
->pos
= 0;
667 unum
= (int32
) (uptr
- dt_dev
.units
);
668 if (unum
== DTA_GETUNIT (dtsa
)) /* if selected, */
669 dt_seterr (uptr
, DTB_SEL
); /* error */
677 Unit must be attached, detach cancels operation
680 t_stat
dt_svc (UNIT
*uptr
)
682 int32 mot
= DTS_GETMOT (uptr
->STATE
);
683 int32 dir
= mot
& DTS_DIR
;
684 int32 fnc
= DTS_GETFNC (uptr
->STATE
);
685 int32
*fbuf
= (int32
*) uptr
->filebuf
;
686 int32 blk
, wrd
, ma
, relpos
;
691 Decelerating - if next state != stopped, must be accel reverse
692 Accelerating - next state must be @speed, schedule function
693 At speed - do functional processing
698 case DTS_DECF
: case DTS_DECR
: /* decelerating */
699 if (dt_setpos (uptr
)) /* upd pos; off reel? */
700 return IORETURN (dt_stopoffr
, STOP_DTOFF
);
701 uptr
->STATE
= DTS_NXTSTA (uptr
->STATE
); /* advance state */
702 if (uptr
->STATE
) /* not stopped? */
703 sim_activate (uptr
, dt_dctime
- (dt_dctime
>> 2)); /* reversing */
706 case DTS_ACCF
: case DTS_ACCR
: /* accelerating */
707 dt_newfnc (uptr
, DTS_NXTSTA (uptr
->STATE
)); /* adv state, sched */
710 case DTS_ATSF
: case DTS_ATSR
: /* at speed */
711 break; /* check function */
714 dt_seterr (uptr
, DTB_SEL
); /* state error */
720 Move - must be at end zone
721 Search - transfer block number, schedule next block
722 Off reel - detach unit (it must be deselected)
725 if (dt_setpos (uptr
)) /* upd pos; off reel? */
726 return IORETURN (dt_stopoffr
, STOP_DTOFF
);
727 if (DT_QEZ (uptr
)) { /* in end zone? */
728 dt_seterr (uptr
, DTB_END
); /* end zone error */
731 blk
= DT_LIN2BL (uptr
->pos
, uptr
); /* get block # */
733 switch (fnc
) { /* at speed, check fnc */
735 case FNC_MOVE
: /* move */
736 dt_seterr (uptr
, DTB_END
); /* end zone error */
739 case DTS_OFR
: /* off reel */
740 detach_unit (uptr
); /* must be deselected */
741 uptr
->STATE
= uptr
->pos
= 0; /* no visible action */
746 case FNC_SRCH
: /* search */
747 if (dtsb
& DTB_DTF
) { /* DTF set? */
748 dt_seterr (uptr
, DTB_TIM
); /* timing error */
751 sim_activate (uptr
, DTU_LPERB (uptr
) * dt_ltime
);/* sched next block */
752 dtdb
= blk
; /* store block # */
753 dtsb
= dtsb
| DTB_DTF
; /* set DTF */
756 /* Read and read all */
758 case FNC_READ
: case FNC_RALL
:
759 if (dtsb
& DTB_DTF
) { /* DTF set? */
760 dt_seterr (uptr
, DTB_TIM
); /* timing error */
763 sim_activate (uptr
, DT_WSIZE
* dt_ltime
); /* sched next word */
764 relpos
= DT_LIN2OF (uptr
->pos
, uptr
); /* cur pos in blk */
765 if ((relpos
>= DT_HTLIN
) && /* in data zone? */
766 (relpos
< (DTU_LPERB (uptr
) - DT_HTLIN
))) {
767 wrd
= DT_LIN2WD (uptr
->pos
, uptr
);
768 ba
= (blk
* DTU_BSIZE (uptr
)) + wrd
;
769 dtdb
= fbuf
[ba
]; /* get tape word */
770 dtsb
= dtsb
| DTB_DTF
; /* set flag */
773 ma
= (2 * DT_HTWRD
) + DTU_BSIZE (uptr
) - DT_CSMWD
- 1;
774 wrd
= relpos
/ DT_WSIZE
; /* hdr start = wd 0 */
775 #if defined (OLD_TYPE550)
776 if ((wrd
== 0) || /* skip 1st, last */
777 (wrd
== ((2 * DT_HTWRD
) + DTU_BSIZE (uptr
) - 1))) break;
779 if ((fnc
== FNC_READ
) && /* read, skip if not */
780 (wrd
!= DT_CSMWD
) && /* fwd, rev cksum */
782 dtdb
= dt_gethdr (uptr
, blk
, relpos
);
783 if (wrd
== (dir
? DT_CSMWD
: ma
)) /* at end csum? */
784 dtsb
= dtsb
| DTB_BEF
; /* end block */
785 else dtsb
= dtsb
| DTB_DTF
; /* else next word */
787 if (dir
) dtdb
= dt_comobv (dtdb
);
790 /* Write and write all */
792 case FNC_WRIT
: case FNC_WALL
:
793 if (dtsb
& DTB_DTF
) { /* DTF set? */
794 dt_seterr (uptr
, DTB_TIM
); /* timing error */
797 sim_activate (uptr
, DT_WSIZE
* dt_ltime
); /* sched next word */
798 relpos
= DT_LIN2OF (uptr
->pos
, uptr
); /* cur pos in blk */
799 if ((relpos
>= DT_HTLIN
) && /* in data zone? */
800 (relpos
< (DTU_LPERB (uptr
) - DT_HTLIN
))) {
801 wrd
= DT_LIN2WD (uptr
->pos
, uptr
);
802 ba
= (blk
* DTU_BSIZE (uptr
)) + wrd
;
803 if (dir
) fbuf
[ba
] = dt_comobv (dtdb
); /* get data word */
804 else fbuf
[ba
] = dtdb
;
805 if (ba
>= uptr
->hwmark
) uptr
->hwmark
= ba
+ 1;
806 if (wrd
== (dir
? 0: DTU_BSIZE (uptr
) - 1))
807 dtsb
= dtsb
| DTB_BEF
; /* end block */
808 else dtsb
= dtsb
| DTB_DTF
; /* else next word */
811 wrd
= relpos
/ DT_WSIZE
; /* hdr start = wd 0 */
812 #if defined (OLD_TYPE550)
813 if ((wrd
== 0) || /* skip 1st, last */
814 (wrd
== ((2 * DT_HTWRD
) + DTU_BSIZE (uptr
) - 1))) break;
816 if ((fnc
== FNC_WRIT
) && /* wr, skip if !csm */
817 (wrd
!= ((2 * DT_HTWRD
) + DTU_BSIZE (uptr
) - DT_CSMWD
- 1)))
819 dtsb
= dtsb
| DTB_DTF
; /* set flag */
824 dt_seterr (uptr
, DTB_SEL
); /* impossible state */
828 DT_UPDINT
; /* update interrupts */
832 /* Utility routines */
836 void dt_seterr (UNIT
*uptr
, int32 e
)
838 int32 mot
= DTS_GETMOT (uptr
->STATE
);
840 dtsa
= dtsa
& ~DTA_STSTP
; /* clear go */
841 dtsb
= dtsb
| DTB_ERF
| e
; /* set error flag */
842 if (mot
>= DTS_ACCF
) { /* ~stopped or stopping? */
843 sim_cancel (uptr
); /* cancel activity */
844 if (dt_setpos (uptr
)) return; /* update position */
845 sim_activate (uptr
, dt_dctime
); /* sched decel */
846 DTS_SETSTA (DTS_DECF
| (mot
& DTS_DIR
), 0); /* state = decel */
852 /* Schedule end zone */
854 void dt_schedez (UNIT
*uptr
, int32 dir
)
858 if (dir
) newpos
= DT_EZLIN
- DT_WSIZE
; /* rev? rev ez */
859 else newpos
= DTU_FWDEZ (uptr
) + DT_WSIZE
; /* fwd? fwd ez */
860 sim_activate (uptr
, ABS (newpos
- ((int32
) uptr
->pos
)) * dt_ltime
);
864 /* Complement obverse routine */
866 int32
dt_comobv (int32 dat
)
868 dat
= dat
^ 0777777; /* compl obverse */
869 dat
= ((dat
>> 15) & 07) | ((dat
>> 9) & 070) |
870 ((dat
>> 3) & 0700) | ((dat
& 0700) << 3) |
871 ((dat
& 070) << 9) | ((dat
& 07) << 15);
875 /* Checksum routine */
877 int32
dt_csum (UNIT
*uptr
, int32 blk
)
879 int32
*fbuf
= (int32
*) uptr
->filebuf
;
880 int32 ba
= blk
* DTU_BSIZE (uptr
);
884 for (i
= 0; i
< DTU_BSIZE (uptr
); i
++) { /* loop thru buf */
885 wrd
= fbuf
[ba
+ i
]; /* get word */
886 csum
= csum
+ wrd
; /* 1's comp add */
887 if (csum
> 0777777) csum
= (csum
+ 1) & 0777777;
889 return (csum
^ 0777777); /* 1's comp res */
892 /* Get header word */
894 int32
dt_gethdr (UNIT
*uptr
, int32 blk
, int32 relpos
)
896 int32 wrd
= relpos
/ DT_WSIZE
;
898 if (wrd
== DT_BLKWD
) return blk
; /* fwd blknum */
899 if (wrd
== DT_CSMWD
) return 0777777; /* rev csum */
900 if (wrd
== (2 * DT_HTWRD
+ DTU_BSIZE (uptr
) - DT_CSMWD
- 1)) /* fwd csum */
901 return (dt_csum (uptr
, blk
));
902 if (wrd
== (2 * DT_HTWRD
+ DTU_BSIZE (uptr
) - DT_BLKWD
- 1)) /* rev blkno */
903 return dt_comobv (blk
);
904 return 0; /* all others */
909 t_stat
dt_reset (DEVICE
*dptr
)
914 for (i
= 0; i
< DT_NUMDR
; i
++) { /* stop all drives */
915 uptr
= dt_dev
.units
+ i
;
916 if (sim_is_running
) { /* CAF? */
917 prev_mot
= DTS_GETMOT (uptr
->STATE
); /* get motion */
918 if ((prev_mot
& ~DTS_DIR
) > DTS_DECF
) { /* accel or spd? */
919 if (dt_setpos (uptr
)) continue; /* update pos */
921 sim_activate (uptr
, dt_dctime
); /* sched decel */
922 DTS_SETSTA (DTS_DECF
| (prev_mot
& DTS_DIR
), 0);
926 sim_cancel (uptr
); /* sim reset */
928 uptr
->LASTT
= sim_grtime ();
931 dtsa
= dtsb
= 0; /* clear status */
932 DT_UPDINT
; /* reset interrupt */
941 return ((dtsb
& (DTB_ERF
| DTB_DTF
))? IOS_DTA
: 0);
949 Determine 12b, 16b, or 18b/36b format
951 If 12b, read 12b format and convert to 18b in buffer
952 If 16b, read 16b format and convert to 18b in buffer
953 If 18b/36b, read data into buffer
956 t_stat
dt_attach (UNIT
*uptr
, char *cptr
)
958 uint16 pdp8b
[D8_NBSIZE
];
959 uint16 pdp11b
[D18_BSIZE
];
960 uint32 ba
, sz
, k
, *fbuf
;
961 int32 u
= uptr
- dt_dev
.units
;
964 r
= attach_unit (uptr
, cptr
); /* attach */
965 if (r
!= SCPE_OK
) return r
; /* error? */
966 if ((sim_switches
& SIM_SW_REST
) == 0) { /* not from rest? */
967 uptr
->flags
= uptr
->flags
& ~(UNIT_8FMT
| UNIT_11FMT
); /* default 18b */
968 if (sim_switches
& SWMASK ('T')) /* att 12b? */
969 uptr
->flags
= uptr
->flags
| UNIT_8FMT
;
970 else if (sim_switches
& SWMASK ('S')) /* att 16b? */
971 uptr
->flags
= uptr
->flags
| UNIT_11FMT
;
972 else if (!(sim_switches
& SWMASK ('A')) && /* autosize? */
973 (sz
= sim_fsize (uptr
->fileref
))) {
975 uptr
->flags
= uptr
->flags
| UNIT_8FMT
;
976 else if (sz
== D11_FILSIZ
)
977 uptr
->flags
= uptr
->flags
| UNIT_11FMT
;
980 uptr
->capac
= DTU_CAPAC (uptr
); /* set capacity */
981 uptr
->filebuf
= calloc (uptr
->capac
, sizeof (uint32
));
982 if (uptr
->filebuf
== NULL
) { /* can't alloc? */
986 fbuf
= (uint32
*) uptr
->filebuf
; /* file buffer */
987 printf ("%s%d: ", sim_dname (&dt_dev
), u
);
988 if (uptr
->flags
& UNIT_8FMT
) printf ("12b format");
989 else if (uptr
->flags
& UNIT_11FMT
) printf ("16b format");
990 else printf ("18b/36b format");
991 printf (", buffering file in memory\n");
992 if (uptr
->flags
& UNIT_8FMT
) { /* 12b? */
993 for (ba
= 0; ba
< uptr
->capac
; ) { /* loop thru file */
994 k
= fxread (pdp8b
, sizeof (uint16
), D8_NBSIZE
, uptr
->fileref
);
996 for ( ; k
< D8_NBSIZE
; k
++) pdp8b
[k
] = 0;
997 for (k
= 0; k
< D8_NBSIZE
; k
= k
+ 3) { /* loop thru blk */
998 fbuf
[ba
] = ((uint32
) (pdp8b
[k
] & 07777) << 6) |
999 ((uint32
) (pdp8b
[k
+ 1] >> 6) & 077);
1000 fbuf
[ba
+ 1] = ((uint32
) (pdp8b
[k
+ 1] & 077) << 12) |
1001 ((uint32
) pdp8b
[k
+ 2] & 07777);
1003 } /* end blk loop */
1004 } /* end file loop */
1007 else if (uptr
->flags
& UNIT_11FMT
) { /* 16b? */
1008 for (ba
= 0; ba
< uptr
->capac
; ) { /* loop thru file */
1009 k
= fxread (pdp11b
, sizeof (uint16
), D18_BSIZE
, uptr
->fileref
);
1011 for ( ; k
< D18_BSIZE
; k
++) pdp11b
[k
] = 0;
1012 for (k
= 0; k
< D18_BSIZE
; k
++)
1013 fbuf
[ba
++] = pdp11b
[k
];
1015 uptr
->hwmark
= ba
; /* end elif */
1017 else uptr
->hwmark
= fxread (uptr
->filebuf
, sizeof (uint32
),
1018 uptr
->capac
, uptr
->fileref
);
1019 uptr
->flags
= uptr
->flags
| UNIT_BUF
; /* set buf flag */
1020 uptr
->pos
= DT_EZLIN
; /* beyond leader */
1021 uptr
->LASTT
= sim_grtime (); /* last pos update */
1027 Cancel in progress operation
1028 If 12b, convert 18b buffer to 12b and write to file
1029 If 16b, convert 18b buffer to 16b and write to file
1030 If 18b/36b, write buffer to file
1034 t_stat
dt_detach (UNIT
* uptr
)
1036 uint16 pdp8b
[D8_NBSIZE
];
1037 uint16 pdp11b
[D18_BSIZE
];
1038 uint32 ba
, k
, *fbuf
;
1039 int32 u
= uptr
- dt_dev
.units
;
1041 if (!(uptr
->flags
& UNIT_ATT
)) return SCPE_OK
; /* attached? */
1042 if (sim_is_active (uptr
)) {
1044 if ((u
== DTA_GETUNIT (dtsa
)) && (dtsa
& DTA_STSTP
)) {
1045 dtsb
= dtsb
| DTB_ERF
| DTB_SEL
| DTB_DTF
;
1048 uptr
->STATE
= uptr
->pos
= 0;
1050 fbuf
= (uint32
*) uptr
->filebuf
; /* file buffer */
1051 if (uptr
->hwmark
&& ((uptr
->flags
& UNIT_RO
) == 0)) { /* any data? */
1052 printf ("%s%d: writing buffer to file\n", sim_dname (&dt_dev
), u
);
1053 rewind (uptr
->fileref
); /* start of file */
1054 if (uptr
->flags
& UNIT_8FMT
) { /* 12b? */
1055 for (ba
= 0; ba
< uptr
->hwmark
; ) { /* loop thru file */
1056 for (k
= 0; k
< D8_NBSIZE
; k
= k
+ 3) { /* loop blk */
1057 pdp8b
[k
] = (fbuf
[ba
] >> 6) & 07777;
1058 pdp8b
[k
+ 1] = ((fbuf
[ba
] & 077) << 6) |
1059 ((fbuf
[ba
+ 1] >> 12) & 077);
1060 pdp8b
[k
+ 2] = fbuf
[ba
+ 1] & 07777;
1062 } /* end loop blk */
1063 fxwrite (pdp8b
, sizeof (uint16
), D8_NBSIZE
, uptr
->fileref
);
1064 if (ferror (uptr
->fileref
)) break;
1065 } /* end loop file */
1067 else if (uptr
->flags
& UNIT_11FMT
) { /* 16b? */
1068 for (ba
= 0; ba
< uptr
->hwmark
; ) { /* loop thru file */
1069 for (k
= 0; k
< D18_BSIZE
; k
++) /* loop blk */
1070 pdp11b
[k
] = fbuf
[ba
++] & 0177777;
1071 fxwrite (pdp11b
, sizeof (uint16
), D18_BSIZE
, uptr
->fileref
);
1072 if (ferror (uptr
->fileref
)) break;
1073 } /* end loop file */
1075 else fxwrite (uptr
->filebuf
, sizeof (uint32
), /* write file */
1076 uptr
->hwmark
, uptr
->fileref
);
1077 if (ferror (uptr
->fileref
)) perror ("I/O error");
1078 } /* end if hwmark */
1079 free (uptr
->filebuf
); /* release buf */
1080 uptr
->flags
= uptr
->flags
& ~UNIT_BUF
; /* clear buf flag */
1081 uptr
->filebuf
= NULL
; /* clear buf ptr */
1082 uptr
->flags
= uptr
->flags
& ~(UNIT_8FMT
| UNIT_11FMT
); /* default fmt */
1083 uptr
->capac
= DT_CAPAC
; /* default size */
1084 return detach_unit (uptr
);