9b5c8c9711
1. New Features in 3.3-1 1.1 H316 TTY - implemented paper-tape reader and punch - added ASCII file support PTR,PTP - added ASCII file support 1.2 HP2100 CPU - added SET CPU 21MX-M, 21MX-E (from Dave Brian) - disabled TIMER/EXECUTE/DIAG instructions for 21MX-M (from Dave Bryan) - added post-processor to maintain T/M consistency (from Dave Bryan) DS - released 13037 disk controller 1.3 Interdata MT - added read-only file support 1.4 SDS MT - added read-only file support 1.5 PDP-11 TM,TS - added read-only file support 2. Bugs Fixed in 3.3 2.1 H316 CPU - fixed bug in divide LPT - fixed bug in DMA/DMC support MT - fixed bug in DMA/DMC support DP - fixed bug in skip on not seeking TTY - fixed bugs in SKS '104, '504 2.2 HP2100 CPU - fixed DMA reset to clear alternate CTL flop (from Dave Bryan) - fixed bug in JPY (from Dave Bryan) - fixed bugs in CBS, SBS, TBS - separate A/B from M[0/1] for DMA (found by Dave Bryan) LPS - added restart when set online, etc. (from Dave Bryan) - fixed col count for non-printing chars (from Dave Bryan) LPT - added restart when set online, etc. (from Dave Bryan) 2.3 PDP-11 CPU - fixed WAIT to work in all modes (from John Dundas)
444 lines
15 KiB
C
444 lines
15 KiB
C
/* sds_mt.c: SDS 940 magnetic tape simulator
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Copyright (c) 2001-2004, Robert M. Supnik
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of Robert M Supnik shall not
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be used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from Robert M Supnik.
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mt 7 track magnetic tape
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07-Dec-04 RMS Added read-only file support
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25-Apr-03 RMS Revised for extended file support
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28-Mar-03 RMS Added multiformat support
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28-Feb-03 RMS Revised for magtape library
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Magnetic tapes are represented as a series of variable 8b records
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of the form:
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32b record length in bytes - exact number
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byte 0
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byte 1
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:
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byte n-2
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byte n-1
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32b record length in bytes - exact number
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If the byte count is odd, the record is padded with an extra byte
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of junk. File marks are represented by a single record length of 0.
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End of tape is two consecutive end of file marks.
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*/
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#include "sds_defs.h"
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#include "sim_tape.h"
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#define MT_MAXFR (32768 * 4)
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#define MT_NUMDR 8 /* number drives */
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#define MT_UNIT 07
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#define botf u3 /* bot tape flag */
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#define eotf u4 /* eot tape flag */
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extern uint32 xfr_req;
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extern int32 stop_invins, stop_invdev, stop_inviop;
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int32 mt_inst = 0; /* saved instr */
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int32 mt_eof = 0; /* end of file */
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int32 mt_gap = 0; /* in gap */
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int32 mt_skip = 0; /* skip rec */
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int32 mt_bptr = 0; /* buf ptr */
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int32 mt_blnt = 0; /* buf length */
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int32 mt_ctime = 10; /* char time */
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int32 mt_gtime = 1000; /* gap time */
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int32 mt_stopioe = 1; /* stop on err */
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uint8 mtxb[MT_MAXFR]; /* record buffer */
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DSPT mt_tplt[] = { /* template */
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{ MT_NUMDR, 0 }, { MT_NUMDR, DEV_MTS },
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{ MT_NUMDR, DEV_OUT }, { MT_NUMDR, DEV_MTS+DEV_OUT },
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{ 0, 0 } };
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DEVICE mt_dev;
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t_stat mt_svc (UNIT *uptr);
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t_stat mt_reset (DEVICE *dptr);
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t_stat mt_boot (int32 unitno, DEVICE *dptr);
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t_stat mt_attach (UNIT *uptr, char *cptr);
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t_stat mt_detach (UNIT *uptr);
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t_stat mt_readrec (UNIT *uptr);
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t_mtrlnt mt_readbc (UNIT *uptr);
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void mt_readend (UNIT *uptr);
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t_stat mt_wrend (uint32 dev);
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void mt_set_err (UNIT *uptr);
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t_stat mt (uint32 fnc, uint32 inst, uint32 *dat);
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static const char sds_to_bcd[64] = {
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012, 001, 002, 003, 004, 005, 006, 007,
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010, 011, 012, 013, 014, 015, 016, 017,
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060, 061, 062, 063, 064, 065, 066, 067,
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070, 071, 072, 073, 074, 075, 076, 077,
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040, 041, 042, 043, 044, 045, 046, 047,
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050, 051, 052, 053, 054, 055, 056, 057,
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020, 021, 022, 023, 024, 025, 026, 027,
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030, 031, 032, 033, 034, 035, 036, 037 };
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static const char bcd_to_sds[64] = {
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000, 001, 002, 003, 004, 005, 006, 007,
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010, 011, 000, 013, 014, 015, 016, 017,
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060, 061, 062, 063, 064, 065, 066, 067,
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070, 071, 072, 073, 074, 075, 076, 077,
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040, 041, 042, 043, 044, 045, 046, 047,
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050, 051, 052, 053, 054, 055, 056, 057,
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020, 021, 022, 023, 024, 025, 026, 027,
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030, 031, 032, 033, 034, 035, 036, 037 };
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/* MT data structures
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mt_dev MT device descriptor
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mt_unit MT unit descriptor
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mt_reg MT register list
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*/
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DIB mt_dib = { CHAN_W, DEV_MT, XFR_MT0, mt_tplt, &mt };
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UNIT mt_unit[] = {
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{ UDATA (&mt_svc, UNIT_ATTABLE + UNIT_ROABLE +UNIT_DISABLE, 0) },
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{ UDATA (&mt_svc, UNIT_ATTABLE + UNIT_ROABLE +UNIT_DISABLE, 0) },
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{ UDATA (&mt_svc, UNIT_ATTABLE + UNIT_ROABLE +UNIT_DISABLE, 0) },
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{ UDATA (&mt_svc, UNIT_ATTABLE + UNIT_ROABLE +UNIT_DISABLE, 0) },
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{ UDATA (&mt_svc, UNIT_ATTABLE + UNIT_ROABLE +UNIT_DISABLE, 0) },
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{ UDATA (&mt_svc, UNIT_ATTABLE + UNIT_ROABLE +UNIT_DISABLE, 0) },
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{ UDATA (&mt_svc, UNIT_ATTABLE + UNIT_ROABLE +UNIT_DISABLE, 0) },
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{ UDATA (&mt_svc, UNIT_ATTABLE + UNIT_ROABLE +UNIT_DISABLE, 0) } };
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REG mt_reg[] = {
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{ BRDATA (BUF, mtxb, 8, 8, MT_MAXFR) },
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{ DRDATA (BPTR, mt_bptr, 18), PV_LEFT },
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{ DRDATA (BLNT, mt_blnt, 18), PV_LEFT },
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{ FLDATA (XFR, xfr_req, XFR_V_MT0) },
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{ ORDATA (INST, mt_inst, 24) },
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{ FLDATA (EOF, mt_eof, 0) },
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{ FLDATA (GAP, mt_gap, 0) },
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{ FLDATA (SKIP, mt_skip, 0) },
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{ DRDATA (CTIME, mt_ctime, 24), REG_NZ + PV_LEFT },
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{ DRDATA (GTIME, mt_gtime, 24), REG_NZ + PV_LEFT },
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{ URDATA (POS, mt_unit[0].pos, 10, T_ADDR_W, 0,
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MT_NUMDR, PV_LEFT | REG_RO) },
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{ URDATA (BOT, mt_unit[0].botf, 10, 1, 0, MT_NUMDR, REG_RO) },
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{ URDATA (EOT, mt_unit[0].eotf, 10, 1, 0, MT_NUMDR, REG_RO) },
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{ FLDATA (STOP_IOE, mt_stopioe, 0) },
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{ NULL } };
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MTAB mt_mod[] = {
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{ MTUF_WLK, 0, "write enabled", "WRITEENABLED", NULL },
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{ MTUF_WLK, MTUF_WLK, "write locked", "LOCKED", NULL },
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{ MTAB_XTD|MTAB_VUN, 0, "FORMAT", "FORMAT",
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&sim_tape_set_fmt, &sim_tape_show_fmt, NULL },
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{ MTAB_XTD|MTAB_VDV, 0, "CHANNEL", "CHANNEL",
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&set_chan, &show_chan, NULL },
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{ 0 } };
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DEVICE mt_dev = {
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"MT", mt_unit, mt_reg, mt_mod,
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MT_NUMDR, 10, 31, 1, 8, 8,
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NULL, NULL, &mt_reset,
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&mt_boot, &mt_attach, NULL,
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&mt_dib, DEV_DISABLE };
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/* Mag tape routine
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conn - inst = EOM0, dat = NULL
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eom1 - inst = EOM1, dat = NULL
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sks - inst = SKS, dat = ptr to result
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disc - inst = device number, dat = NULL
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wreor - inst = device number, dat = NULL
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read - inst = device number, dat = ptr to data
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write - inst = device number, dat = ptr to result
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*/
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t_stat mt (uint32 fnc, uint32 inst, uint32 *dat)
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{
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int32 u = inst & MT_UNIT; /* get unit */
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UNIT *uptr = mt_dev.units + u; /* get unit ptr */
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int32 t, new_ch;
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uint8 chr;
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t_stat r;
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switch (fnc) { /* case function */
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case IO_CONN: /* connect */
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new_ch = I_GETEOCH (inst); /* get new chan */
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if (new_ch != mt_dib.chan) return SCPE_IERR; /* wrong chan? */
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if (mt_gap) { /* in gap? */
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mt_gap = 0; /* clr gap flg */
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sim_cancel (uptr); } /* cancel timer */
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else if (sim_is_active (uptr)) CRETIOP; /* busy? */
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uptr->eotf = 0; /* clr eot flag */
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mt_eof = 0; /* clr eof flag */
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mt_skip = 0; /* clr skp flag */
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mt_bptr = mt_blnt = 0; /* init buffer */
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if ((inst & DEV_MTS)? (CHC_GETCPW (inst) < 2): /* scn & cpw<3? */
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(inst & CHC_REV)) return STOP_INVIOP; /* rw & rev? */
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mt_inst = inst; /* save inst */
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if ((inst & DEV_MTS) && !(inst && DEV_OUT)) /* scanning? */
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chan_set_flag (mt_dib.chan, CHF_SCAN); /* set chan flg */
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xfr_req = xfr_req & ~XFR_MT0; /* clr xfr flag */
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sim_activate (uptr, mt_gtime); /* start timer */
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break;
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case IO_EOM1: /* EOM mode 1 */
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new_ch = I_GETEOCH (inst); /* get new chan */
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if (new_ch != mt_dib.chan) CRETIOP; /* wrong chan? */
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t = inst & 07670; /* get command */
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if ((t == 04010) && !sim_is_active (uptr)) { /* rewind? */
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sim_tape_rewind (uptr); /* rewind unit */
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uptr->eotf = 0; /* clr eot */
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uptr->botf = 1; } /* set bot */
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else if ((t == 03610) && sim_is_active (uptr) && /* skip rec? */
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((mt_inst & DEV_OUT) == 0)) mt_skip = 1; /* set flag */
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else CRETINS;
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break;
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case IO_DISC: /* disconnect */
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sim_cancel (uptr); /* no more xfr's */
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if (inst & DEV_OUT) { /* write? */
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if (r = mt_wrend (inst)) return r; } /* end record */
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break;
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case IO_WREOR: /* write eor */
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chan_set_flag (mt_dib.chan, CHF_EOR); /* set eor flg */
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if (r = mt_wrend (inst)) return r; /* end record */
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mt_gap = 1; /* in gap */
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sim_activate (uptr, mt_gtime); /* start timer */
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break;
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case IO_SKS: /* SKS */
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new_ch = I_GETSKCH (inst); /* get chan # */
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if (new_ch != mt_dib.chan) return SCPE_IERR; /* wrong chan? */
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if ((inst & (DEV_OUT | DEV_MTS)) == 0) { /* not sks 1n? */
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t = I_GETSKCND (inst); /* get skip cond */
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switch (t) { /* case sks cond */
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case 001: /* sks 1021n */
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*dat = 1; /* not magpak */
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break;
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case 002: /* sks 1041n */
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if (!(uptr->flags & UNIT_ATT) || /* not ready */
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sim_is_active (uptr)) *dat = 1;
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break;
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case 004: /* sks 1101n */
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if (!uptr->eotf) *dat = 1; /* not EOT */
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break;
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case 010: /* sks 1201n */
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if (!uptr->botf) *dat = 1; /* not BOT */
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break;
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case 013: /* sks 12610 */
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if (!mt_gap) *dat = 1; /* not in gap */
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break;
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case 017: /* sks 13610 */
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if (!mt_eof) *dat = 1; /* not EOF */
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break;
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case 020: /* sks 1401n */
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if (!sim_tape_wrp (uptr)) *dat = 1; /* not wrp */
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break;
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case 031: /* sks 1621n */
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case 033: /* sks 1661n */
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*dat = 1; /* not 556bpi */
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case 035: /* sks 1721n */
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break; } /* not 800bpi */
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} /* end if */
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break;
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case IO_READ: /* read */
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xfr_req = xfr_req & ~XFR_MT0; /* clr xfr flag */
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if (mt_blnt == 0) { /* first read? */
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r = mt_readrec (uptr); /* get data */
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if ((r != SCPE_OK) || (mt_blnt == 0)) return r; } /* err, inv reclnt? */
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uptr->botf = 0; /* off BOT */
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if (mt_inst & CHC_REV) chr = mtxb[--mt_bptr] & 077; /* get next rev */
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else chr = mtxb[mt_bptr++] & 077; /* get next fwd */
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if (!(mt_inst & CHC_BIN)) chr = bcd_to_sds[chr]; /* bcd? */
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*dat = chr & 077; /* give to chan */
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if ((mt_inst & CHC_REV)? (mt_bptr <= 0): /* rev or fwd, */
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(mt_bptr >= mt_blnt)) mt_readend (uptr); /* recd done? */
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break;
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case IO_WRITE: /* write */
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uptr->botf = 0; /* off BOT */
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chr = (*dat) & 077;
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xfr_req = xfr_req & ~XFR_MT0; /* clr xfr flag */
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if (!(mt_inst & CHC_BIN)) chr = sds_to_bcd[chr]; /* bcd? */
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if (mt_bptr < MT_MAXFR) mtxb[mt_bptr++] = chr; /* insert in buf */
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break;
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default:
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CRETINS; }
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return SCPE_OK;
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}
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/* Unit service */
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t_stat mt_svc (UNIT *uptr)
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{
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if (mt_gap) { /* gap timeout */
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mt_gap = 0; /* clr gap flg */
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chan_disc (mt_dib.chan); } /* disc chan */
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else if (mt_skip) mt_readend (uptr); /* skip record */
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else { /* normal xfr */
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xfr_req = xfr_req | XFR_MT0; /* set xfr req */
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sim_activate (uptr, mt_ctime); } /* reactivate */
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return SCPE_OK;
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}
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/* Read start (get new record) */
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t_stat mt_readrec (UNIT *uptr)
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{
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t_mtrlnt tbc;
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t_stat st, r = SCPE_OK;
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if ((uptr->flags & UNIT_ATT) == 0) { /* attached? */
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mt_set_err (uptr); /* no, err, disc */
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return SCPE_UNATT; }
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if (mt_inst & CHC_REV) /* reverse? */
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st = sim_tape_rdrecr (uptr, mtxb, &tbc, MT_MAXFR); /* read rec rev */
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else st = sim_tape_rdrecf (uptr, mtxb, &tbc, MT_MAXFR); /* no, fwd */
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if (st == MTSE_TMK) { /* tape mark? */
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mt_eof = 1; /* set eof flag */
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mtxb[0] = mtxb[1] = 017; /* EOR char */
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mt_blnt = 2; /* store 2 */
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return SCPE_OK; }
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if (st != MTSE_OK) { /* other error? */
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mt_set_err (uptr); /* err, disc */
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if (st == MTSE_IOERR) return SCPE_IOERR; /* IO error? */
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if (st == MTSE_INVRL) return SCPE_MTRLNT; /* inv rec lnt? */
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if (st == MTSE_EOM) uptr->eotf = 1; /* eom? set eot */
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return SCPE_OK; }
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mt_blnt = tbc; /* set buf lnt */
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return SCPE_OK;
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}
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/* Read done (eof, end of record) */
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void mt_readend (UNIT *uptr)
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{
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sim_cancel (uptr); /* stop timer */
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mt_skip = 0; /* clr skp flg */
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chan_set_flag (mt_dib.chan, CHF_EOR); /* end record */
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if (mt_eof) chan_disc (mt_dib.chan); /* EOF? */
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else {
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mt_gap = 1; /* no, in gap */
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sim_activate (uptr, mt_gtime); } /* start timer */
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return;
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}
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/* Write complete (end of record or disconnect) */
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t_stat mt_wrend (uint32 dev)
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{
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UNIT *uptr = mt_dev.units + (dev & MT_UNIT);
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t_mtrlnt tbc;
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t_stat st;
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sim_cancel (uptr); /* no more xfr's */
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if (mt_bptr == 0) return SCPE_OK; /* buf empty? */
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if (!(uptr->flags & UNIT_ATT)) { /* attached? */
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mt_set_err (uptr); /* no, err, disc */
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return SCPE_UNATT; }
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if (sim_tape_wrp (uptr)) { /* write lock? */
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mt_set_err (uptr); /* yes, err, disc */
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return SCPE_OK; }
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if (dev & DEV_MTS) { /* erase? */
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if (mt_inst & CHC_REV) /* reverse? */
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sim_tape_sprecr (uptr, &tbc); /* backspace */
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st = sim_tape_wreom (uptr); /* write eom */
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}
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else {
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if ((mt_bptr == 1) && (mtxb[0] == 017) && /* wr eof? */
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((mt_inst & 01670) == 00050))
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st = sim_tape_wrtmk (uptr); /* write tape mark */
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else st = sim_tape_wrrecf (uptr, mtxb, mt_bptr); /* write record */
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}
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mt_bptr = 0;
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if (st != MTSE_OK) mt_set_err (uptr); /* error? */
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if (st == MTSE_IOERR) return SCPE_IOERR;
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return SCPE_OK;
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}
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/* Fatal error */
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void mt_set_err (UNIT *uptr)
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{
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chan_set_flag (mt_dib.chan, CHF_EOR | CHF_ERR); /* eor, error */
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chan_disc (mt_dib.chan); /* disconnect */
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xfr_req = xfr_req & ~XFR_MT0; /* clear xfr */
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sim_cancel (uptr); /* stop */
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mt_bptr = 0; /* buf empty */
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return;
|
||
}
|
||
/* Reset routine */
|
||
|
||
t_stat mt_reset (DEVICE *dptr)
|
||
{
|
||
int32 i;
|
||
|
||
chan_disc (mt_dib.chan); /* disconnect */
|
||
mt_eof = 0; /* clear state */
|
||
mt_gap = 0;
|
||
mt_skip = 0;
|
||
mt_inst = 0;
|
||
mt_bptr = mt_blnt = 0;
|
||
xfr_req = xfr_req & ~XFR_MT0; /* clr xfr flag */
|
||
for (i = 0; i < MT_NUMDR; i++) { /* deactivate */
|
||
sim_cancel (&mt_unit[i]);
|
||
sim_tape_reset (&mt_unit[i]);
|
||
mt_unit[i].eotf = 0; }
|
||
return SCPE_OK;
|
||
}
|
||
|
||
/* Attach and detach routines */
|
||
|
||
t_stat mt_attach (UNIT *uptr, char *cptr)
|
||
{
|
||
t_stat r;
|
||
|
||
r = sim_tape_attach (uptr, cptr);
|
||
if (r != SCPE_OK) return r;
|
||
uptr->botf = 1;
|
||
uptr->eotf = 0;
|
||
return SCPE_OK;
|
||
}
|
||
|
||
t_stat mt_detach (UNIT *uptr)
|
||
{
|
||
uptr->botf = uptr->eotf = 0;
|
||
return sim_tape_detach (uptr);
|
||
}
|
||
|
||
/* Boot routine - simulate FILL console command */
|
||
|
||
t_stat mt_boot (int32 unitno, DEVICE *dptr)
|
||
{
|
||
extern uint32 P, M[];
|
||
|
||
if (unitno) return SCPE_ARG; /* only unit 0 */
|
||
M[0] = 077777771; /* -7B */
|
||
M[1] = 007100000; /* LDX 0 */
|
||
M[2] = 000203610; /* EOM 3610B */
|
||
M[3] = 003200002; /* WIM 2 */
|
||
M[4] = 000100002; /* BRU 2 */
|
||
P = 1; /* start at 1 */
|
||
return SCPE_OK;
|
||
}
|