651 lines
27 KiB
C
651 lines
27 KiB
C
/* nova_mta.c: NOVA magnetic tape simulator
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Copyright (c) 1993-2022, 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 be
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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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mta magnetic tape
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26-Mar-22 RMS Added extra case points for new MTSE definitions
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13-Mar-17 RMS Annotated fall through in switch
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04-Jul-07 BKR fixed boot code to properly boot self-boot tapes;
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boot routine now uses standard DG APL boot code;
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device name changed to DG's MTA from DEC's MT.
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16-Aug-05 RMS Fixed C++ declaration and cast problems
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18-Mar-05 RMS Added attached test to detach routine
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22-Nov-03 CEO DIB returns # records skipped after space fwd
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22-Nov-03 CEO Removed cancel of tape events in IORST
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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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30-Oct-02 RMS Fixed BOT handling, added error record handling
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08-Oct-02 RMS Added DIB
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30-Sep-02 RMS Revamped error handling
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28-Aug-02 RMS Added end of medium support
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30-May-02 RMS Widened POS to 32b
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22-Apr-02 RMS Added maximum record length test
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06-Jan-02 RMS Revised enable/disable support
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30-Nov-01 RMS Added read only unit, extended SET/SHOW support
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24-Nov-01 RMS Changed POS, USTAT, FLG to an array
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26-Apr-01 RMS Added device enable/disable support
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18-Apr-01 RMS Changed to rewind tape before boot
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10-Dec-00 RMS Added Eclipse support (Charles Owen)
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15-Oct-00 RMS Editorial changes
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11-Nov-98 CEO Removed clear of mta_ma on iopC
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04-Oct-98 RMS V2.4 magtape format
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18-Jan-97 RMS V2.3 magtape format
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29-Jun-96 RMS Added unit enable/disable support
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Magnetic tapes are represented as a series of variable records
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of the form:
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32b byte count byte count is little endian
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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 byte count
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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 byte count of 0 and are
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not duplicated; end of tape by end of file.
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*/
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#include "nova_defs.h"
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#include "sim_tape.h"
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#define MTA_NUMDR 8 /* #drives */
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#define USTAT u3 /* unit status */
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#define MTA_MAXFR (1 << 16) /* max record lnt */
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#define WC_SIZE (1 << 14) /* max word count */
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#define WC_MASK (WC_SIZE - 1)
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/* Command/unit */
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#define CU_CI 0100000 /* clear interrupt */
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#define CU_EP 0002000 /* poll enable */
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#define CU_DE 0001000 /* disable erase */
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#define CU_DA 0000400 /* disable autoretry */
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#define CU_PE 0000400 /* PE mode */
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#define CU_V_CMD 3 /* command */
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#define CU_M_CMD 027
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#define CU_READ 000
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#define CU_REWIND 001
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#define CU_CMODE 002
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#define CU_SPACEF 003
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#define CU_SPACER 004
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#define CU_WRITE 005
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#define CU_WREOF 006
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#define CU_ERASE 007
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#define CU_READNS 020
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#define CU_UNLOAD 021
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#define CU_DMODE 022
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#define CU_V_UNIT 0 /* unit */
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#define CU_M_UNIT 07
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#define GET_CMD(x) (((x) >> CU_V_CMD) & CU_M_CMD)
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#define GET_UNIT(x) (((x) >> CU_V_UNIT) & CU_M_UNIT)
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/* Status 1 - stored in mta_sta<31:16> or (*) uptr->USTAT<31:16> */
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#define STA_ERR1 (0100000u << 16) /* error */
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#define STA_DLT (0040000 << 16) /* data late */
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#define STA_REW (0020000 << 16) /* *rewinding */
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#define STA_ILL (0010000 << 16) /* illegal */
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#define STA_HDN (0004000 << 16) /* high density */
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#define STA_DAE (0002000 << 16) /* data error */
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#define STA_EOT (0001000 << 16) /* *end of tape */
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#define STA_EOF (0000400 << 16) /* *end of file */
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#define STA_BOT (0000200 << 16) /* *start of tape */
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#define STA_9TK (0000100 << 16) /* nine track */
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#define STA_BAT (0000040 << 16) /* bad tape */
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#define STA_CHG (0000010 << 16) /* status change */
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#define STA_WLK (0000004 << 16) /* *write lock */
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#define STA_ODD (0000002 << 16) /* odd character */
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#define STA_RDY (0000001 << 16) /* *drive ready */
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/* Status 2 - stored in mta_sta<15:0> or (*) uptr->USTAT<15:0> */
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#define STA_ERR2 0100000 /* error */
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#define STA_RWY 0040000 /* runaway tape */
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#define STA_FGP 0020000 /* false gap */
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#define STA_CDL 0004000 /* corrected dlt */
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#define STA_V_UNIT 8
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#define STA_M_UNIT 07 /* unit */
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#define STA_WCO 0000200 /* word count ovflo */
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#define STA_BDS 0000100 /* bad signal */
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#define STA_OVS 0000040 /* overskew */
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#define STA_CRC 0000020 /* check error */
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#define STA_STE 0000010 /* single trk error */
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#define STA_FPR 0000004 /* false preamble */
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#define STA_FMT 0000002 /* format error */
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#define STA_PEM 0000001 /* *PE mode */
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#define STA_EFLGS1 (STA_DLT | STA_ILL | STA_DAE | STA_EOT | \
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STA_EOF | STA_BOT | STA_BAT | STA_ODD)
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#define STA_EFLGS2 (STA_FGP | STA_CDL | STA_BDS | STA_OVS | \
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STA_CRC | STA_FPR | STA_FPR) /* set error 2 */
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#define STA_CLR ((020 << 16) | 0010000) /* always clear */
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#define STA_SET (STA_HDN | STA_9TK) /* always set */
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#define STA_DYN (STA_REW | STA_EOT | STA_EOF | STA_BOT | \
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STA_WLK | STA_RDY | STA_PEM) /* kept in USTAT */
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#define STA_MON (STA_REW | STA_BOT | STA_WLK | STA_RDY | \
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STA_PEM) /* set status chg */
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extern uint16 M[];
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extern UNIT cpu_unit;
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extern int32 int_req, dev_busy, dev_done, dev_disable;
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extern int32 SR, AMASK;
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extern t_stat cpu_boot(int32 unitno, DEVICE * dptr ) ;
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int32 mta_ma = 0; /* memory address */
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int32 mta_wc = 0; /* word count */
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int32 mta_cu = 0; /* command/unit */
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int32 mta_sta = 0; /* status register */
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int32 mta_ep = 0; /* enable polling */
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int32 mta_cwait = 100; /* command latency */
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int32 mta_rwait = 100; /* record latency */
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uint8 *mtxb = NULL; /* transfer buffer */
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int32 mta (int32 pulse, int32 code, int32 AC);
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t_stat mta_svc (UNIT *uptr);
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t_stat mta_reset (DEVICE *dptr);
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t_stat mta_boot (int32 unitno, DEVICE *dptr);
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t_stat mta_attach (UNIT *uptr, CONST char *cptr);
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t_stat mta_detach (UNIT *uptr);
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int32 mta_updcsta (UNIT *uptr);
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void mta_upddsta (UNIT *uptr, int32 newsta);
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t_stat mta_map_err (UNIT *uptr, t_stat st);
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t_stat mta_vlock (UNIT *uptr, int32 val, CONST char *cptr, void *desc);
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static const int ctype[32] = { /* c vs r timing */
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0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
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0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1
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};
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/* MTA data structures
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mta_dev MTA device descriptor
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mta_unit MTA unit list
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mta_reg MTA register list
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mta_mod MTA modifier list
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*/
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DIB mta_dib = { DEV_MTA, INT_MTA, PI_MTA, &mta };
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UNIT mta_unit[] = {
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{ UDATA (&mta_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },
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{ UDATA (&mta_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },
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{ UDATA (&mta_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },
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{ UDATA (&mta_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },
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{ UDATA (&mta_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },
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{ UDATA (&mta_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },
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{ UDATA (&mta_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) },
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{ UDATA (&mta_svc, UNIT_ATTABLE+UNIT_DISABLE+UNIT_ROABLE, 0) }
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};
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REG mta_reg[] = {
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{ ORDATA (CU, mta_cu, 16) },
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{ ORDATA (MA, mta_ma, 16) },
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{ ORDATA (WC, mta_wc, 16) },
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{ GRDATA (STA1, mta_sta, 8, 16, 16) },
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{ ORDATA (STA2, mta_sta, 16) },
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{ FLDATA (EP, mta_ep, 0) },
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{ FLDATA (BUSY, dev_busy, INT_V_MTA) },
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{ FLDATA (DONE, dev_done, INT_V_MTA) },
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{ FLDATA (DISABLE, dev_disable, INT_V_MTA) },
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{ FLDATA (INT, int_req, INT_V_MTA) },
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{ DRDATA (CTIME, mta_cwait, 24), PV_LEFT },
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{ DRDATA (RTIME, mta_rwait, 24), PV_LEFT },
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{ URDATA (UST, mta_unit[0].USTAT, 8, 32, 0, MTA_NUMDR, 0) },
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{ URDATA (POS, mta_unit[0].pos, 8, T_ADDR_W, 0,
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MTA_NUMDR, REG_RO | PV_LEFT) },
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{ NULL }
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};
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MTAB mta_mod[] = {
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{ MTAB_XTD|MTAB_VUN, 0, "write enabled", "WRITEENABLED",
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&set_writelock, &show_writelock, NULL, "Write ring in place" },
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{ MTAB_XTD|MTAB_VUN, 1, NULL, "LOCKED",
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&set_writelock, NULL, NULL, "no Write ring in place" },
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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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{ 0 }
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};
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DEVICE mta_dev = {
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"MTA", mta_unit, mta_reg, mta_mod,
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MTA_NUMDR, 10, 31, 1, 8, 8,
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NULL, NULL, &mta_reset,
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&mta_boot, &mta_attach, &mta_detach,
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&mta_dib, DEV_DISABLE | DEV_TAPE
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};
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/* IOT routine */
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int32 mta (int32 pulse, int32 code, int32 AC)
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{
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UNIT *uptr;
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int32 u, c, rval;
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rval = 0;
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uptr = mta_dev.units + GET_UNIT(mta_cu); /* get unit */
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switch (code) { /* decode IR<5:7> */
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case ioDIA: /* DIA */
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rval = (mta_updcsta (uptr) >> 16) & DMASK; /* return status 1 */
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break;
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case ioDOA: /* DOA */
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/* if (AC & CU_CI) ... clear ep int */
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mta_cu = AC; /* save cmd/unit */
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uptr = mta_dev.units + GET_UNIT(mta_cu); /* get unit */
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mta_updcsta (uptr); /* update status */
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break;
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case ioDIB: /* DIB */
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rval = mta_ma & AMASK; /* return ma */
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break;
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case ioDOB: /* DOB */
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mta_ma = AC & AMASK; /* save ma */
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break;
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case ioDIC: /* DIC */
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rval = mta_updcsta (uptr) & DMASK; /* return status 2 */
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break;
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case ioDOC: /* DOC */
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mta_wc = ((AC & 040000) << 1) | (AC & 077777); /* save wc */
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break;
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} /* end switch code */
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switch (pulse) { /* decode IR<8:9> */
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case iopS: /* start */
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c = GET_CMD (mta_cu); /* get command */
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if (dev_busy & INT_MTA) /* ignore if busy */
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break;
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if ((uptr->USTAT & STA_RDY) == 0) { /* drive not ready? */
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mta_sta = mta_sta | STA_ILL; /* illegal op */
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dev_busy = dev_busy & ~INT_MTA; /* clear busy */
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dev_done = dev_done | INT_MTA; /* set done */
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int_req = (int_req & ~INT_DEV) | (dev_done & ~dev_disable);
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}
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else if ((c == CU_REWIND) || (c == CU_UNLOAD)) { /* rewind, unload? */
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mta_upddsta (uptr, (uptr->USTAT & /* update status */
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~(STA_BOT | STA_EOF | STA_EOT | STA_RDY)) | STA_REW);
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sim_activate (uptr, mta_rwait); /* start IO */
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if (c == CU_UNLOAD)
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sim_tape_detach (uptr);
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}
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else {
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mta_sta = 0; /* clear errors */
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dev_busy = dev_busy | INT_MTA; /* set busy */
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dev_done = dev_done & ~INT_MTA; /* clear done */
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int_req = int_req & ~INT_MTA; /* clear int */
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if (ctype[c])
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sim_activate (uptr, mta_cwait);
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else {
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mta_upddsta (uptr, uptr->USTAT &
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~(STA_BOT | STA_EOF | STA_EOT | STA_RDY));
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sim_activate (uptr, mta_rwait);
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}
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}
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mta_updcsta (uptr); /* update status */
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break;
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case iopC: /* clear */
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for (u = 0; u < MTA_NUMDR; u++) { /* loop thru units */
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uptr = mta_dev.units + u; /* cancel IO */
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if (sim_is_active (uptr) && !(uptr->USTAT & STA_REW)) {
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mta_upddsta (uptr, uptr->USTAT | STA_RDY);
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sim_cancel (uptr);
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}
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}
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dev_busy = dev_busy & ~INT_MTA; /* clear busy */
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dev_done = dev_done & ~INT_MTA; /* clear done */
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int_req = int_req & ~INT_MTA; /* clear int */
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mta_sta = mta_cu = 0; /* clear registers */
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mta_updcsta (&mta_unit[0]); /* update status */
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break;
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} /* end case pulse */
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return rval;
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}
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/* Unit service
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If rewind done, reposition to start of tape, set status
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else, do operation, clear busy, set done, interrupt
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*/
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t_stat mta_svc (UNIT *uptr)
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{
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int32 c, p, pa, u;
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t_mtrlnt i, cbc, tbc, wc;
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uint16 c1, c2;
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t_stat st, r = SCPE_OK;
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u = uptr - mta_dev.units; /* get unit number */
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c = GET_CMD (mta_cu); /* command */
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wc = WC_SIZE - (mta_wc & WC_MASK); /* io wc */
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if (uptr->USTAT & STA_REW) { /* rewind? */
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sim_tape_rewind (uptr); /* update tape */
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mta_upddsta (uptr, (uptr->USTAT & ~STA_REW) | STA_BOT | STA_RDY);
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if (u == GET_UNIT (mta_cu))
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mta_updcsta (uptr);
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return SCPE_OK;
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}
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if ((uptr->flags & UNIT_ATT) == 0) { /* not attached? */
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mta_upddsta (uptr, 0); /* unit off line */
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mta_sta = mta_sta | STA_ILL; /* illegal operation */
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}
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else switch (c) { /* case on command */
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case CU_CMODE: /* controller mode */
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mta_ep = mta_cu & CU_EP;
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break;
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case CU_DMODE: /* drive mode */
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if (!sim_tape_bot (uptr)) /* must be BOT */
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mta_sta = mta_sta | STA_ILL;
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else mta_upddsta (uptr, (mta_cu & CU_PE)? /* update drv status */
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uptr->USTAT | STA_PEM: uptr->USTAT & ~ STA_PEM);
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break;
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case CU_READ: /* read */
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case CU_READNS: /* read non-stop */
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st = sim_tape_rdrecf (uptr, mtxb, &tbc, MTA_MAXFR); /* read rec */
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if (st == MTSE_RECE) /* rec in err? */
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mta_sta = mta_sta | STA_DAE;
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else if (st != MTSE_OK) { /* other error? */
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r = mta_map_err (uptr, st); /* map error */
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break;
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}
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cbc = wc * 2; /* expected bc */
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if (tbc & 1) /* odd byte count? */
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mta_sta = mta_sta | STA_ODD;
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if (tbc > cbc) /* too big? */
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mta_sta = mta_sta | STA_WCO;
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else {
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cbc = tbc; /* no, use it */
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wc = (cbc + 1) / 2; /* adjust wc */
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}
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for (i = p = 0; i < wc; i++) { /* copy buf to mem */
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c1 = mtxb[p++];
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c2 = mtxb[p++];
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pa = MapAddr (0, mta_ma); /* map address */
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if (MEM_ADDR_OK (pa))
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M[pa] = (c1 << 8) | c2;
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mta_ma = (mta_ma + 1) & AMASK;
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}
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mta_wc = (mta_wc + wc) & DMASK;
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mta_upddsta (uptr, uptr->USTAT | STA_RDY);
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break;
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case CU_WRITE: /* write */
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tbc = wc * 2; /* io byte count */
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for (i = p = 0; i < wc; i++) { /* copy to buffer */
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pa = MapAddr (0, mta_ma); /* map address */
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mtxb[p++] = (M[pa] >> 8) & 0377;
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mtxb[p++] = M[pa] & 0377;
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mta_ma = (mta_ma + 1) & AMASK;
|
|
}
|
|
if ((st = sim_tape_wrrecf (uptr, mtxb, tbc))) { /* write rec, err? */
|
|
r = mta_map_err (uptr, st); /* map error */
|
|
mta_ma = (mta_ma - wc) & AMASK; /* restore wc */
|
|
}
|
|
else mta_wc = 0; /* clear wc */
|
|
mta_upddsta (uptr, uptr->USTAT | STA_RDY);
|
|
break;
|
|
|
|
case CU_WREOF: /* write eof */
|
|
if ((st = sim_tape_wrtmk (uptr))) /* write tmk, err? */
|
|
r = mta_map_err (uptr, st); /* map error */
|
|
else mta_upddsta (uptr, uptr->USTAT | STA_EOF | STA_RDY);
|
|
break;
|
|
|
|
case CU_ERASE: /* erase */
|
|
if (sim_tape_wrp (uptr)) /* write protected? */
|
|
r = mta_map_err (uptr, MTSE_WRP); /* map error */
|
|
else mta_upddsta (uptr, uptr->USTAT | STA_RDY);
|
|
break;
|
|
|
|
case CU_SPACEF: /* space forward */
|
|
do {
|
|
mta_wc = (mta_wc + 1) & DMASK; /* incr wc */
|
|
if ((st = sim_tape_sprecf (uptr, &tbc))) { /* space rec fwd, err? */
|
|
r = mta_map_err (uptr, st); /* map error */
|
|
break;
|
|
}
|
|
} while (mta_wc != 0);
|
|
mta_upddsta (uptr, uptr->USTAT | STA_RDY);
|
|
mta_ma = mta_wc; /* word count = # records */
|
|
break;
|
|
|
|
case CU_SPACER: /* space reverse */
|
|
do {
|
|
mta_wc = (mta_wc + 1) & DMASK; /* incr wc */
|
|
if ((st = sim_tape_sprecr (uptr, &tbc))) { /* space rec rev, err? */
|
|
r = mta_map_err (uptr, st); /* map error */
|
|
break;
|
|
}
|
|
} while (mta_wc != 0);
|
|
mta_upddsta (uptr, uptr->USTAT | STA_RDY);
|
|
mta_ma = mta_wc; /* word count = # records */
|
|
break;
|
|
|
|
default: /* reserved */
|
|
mta_sta = mta_sta | STA_ILL;
|
|
mta_upddsta (uptr, uptr->USTAT | STA_RDY);
|
|
break;
|
|
} /* end case */
|
|
|
|
mta_updcsta (uptr); /* update status */
|
|
dev_busy = dev_busy & ~INT_MTA; /* clear busy */
|
|
dev_done = dev_done | INT_MTA; /* set done */
|
|
int_req = (int_req & ~INT_DEV) | (dev_done & ~dev_disable);
|
|
return r;
|
|
}
|
|
|
|
/* Update controller status */
|
|
|
|
int32 mta_updcsta (UNIT *uptr) /* update ctrl */
|
|
{
|
|
mta_sta = (mta_sta & ~(STA_DYN | STA_CLR | STA_ERR1 | STA_ERR2)) |
|
|
(uptr->USTAT & STA_DYN) | STA_SET;
|
|
if (mta_sta & STA_EFLGS1)
|
|
mta_sta = mta_sta | STA_ERR1;
|
|
if (mta_sta & STA_EFLGS2)
|
|
mta_sta = mta_sta | STA_ERR2;
|
|
return mta_sta;
|
|
}
|
|
|
|
/* Update drive status */
|
|
|
|
void mta_upddsta (UNIT *uptr, int32 newsta) /* drive status */
|
|
{
|
|
int32 change;
|
|
|
|
if ((uptr->flags & UNIT_ATT) == 0) /* offline? */
|
|
newsta = 0;
|
|
change = (uptr->USTAT ^ newsta) & STA_MON; /* changes? */
|
|
uptr->USTAT = newsta & STA_DYN; /* update status */
|
|
if (change) {
|
|
/* if (mta_ep) { *//* if polling */
|
|
/* u = uptr - mta_dev.units; *//* unit num */
|
|
/* mta_sta = (mta_sta & ~STA_UNIT) | (u << STA_V_UNIT); */
|
|
/* set polling interupt... */
|
|
/* } */
|
|
mta_sta = mta_sta | STA_CHG; /* flag change */
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Map tape error status */
|
|
|
|
t_stat mta_map_err (UNIT *uptr, t_stat st)
|
|
{
|
|
switch (st) {
|
|
|
|
case MTSE_FMT: /* illegal fmt */
|
|
mta_upddsta (uptr, uptr->USTAT | STA_WLK | STA_RDY);
|
|
/* fall through */
|
|
default:
|
|
case MTSE_UNATT: /* unattached */
|
|
mta_sta = mta_sta | STA_ILL;
|
|
/* fall through */
|
|
case MTSE_OK: /* no error */
|
|
return SCPE_IERR; /* never get here! */
|
|
|
|
case MTSE_TMK: /* end of file */
|
|
mta_upddsta (uptr, uptr->USTAT | STA_RDY | STA_EOF);
|
|
break;
|
|
|
|
case MTSE_IOERR: /* IO error */
|
|
mta_sta = mta_sta | STA_DAE; /* data error */
|
|
mta_upddsta (uptr, uptr->USTAT | STA_RDY); /* ready */
|
|
return SCPE_IOERR;
|
|
|
|
case MTSE_INVRL: /* invalid rec lnt */
|
|
mta_sta = mta_sta | STA_DAE; /* data error */
|
|
mta_upddsta (uptr, uptr->USTAT | STA_RDY); /* ready */
|
|
return SCPE_MTRLNT;
|
|
|
|
case MTSE_RECE: /* record in error */
|
|
mta_sta = mta_sta | STA_DAE; /* data error */
|
|
mta_upddsta (uptr, uptr->USTAT | STA_RDY); /* ready */
|
|
break;
|
|
|
|
case MTSE_EOM: /* end of medium */
|
|
mta_sta = mta_sta | STA_BAT; /* bad tape */
|
|
mta_upddsta (uptr, uptr->USTAT | STA_RDY); /* ready */
|
|
break;
|
|
|
|
case MTSE_BOT: /* reverse into BOT */
|
|
mta_upddsta (uptr, uptr->USTAT | STA_RDY | STA_BOT);
|
|
break;
|
|
|
|
case MTSE_WRP: /* write protect */
|
|
mta_upddsta (uptr, uptr->USTAT | STA_WLK | STA_RDY);
|
|
mta_sta = mta_sta | STA_ILL; /* illegal operation */
|
|
break;
|
|
}
|
|
|
|
return SCPE_OK;
|
|
}
|
|
|
|
/* Reset routine */
|
|
|
|
t_stat mta_reset (DEVICE *dptr)
|
|
{
|
|
int32 u;
|
|
UNIT *uptr;
|
|
|
|
dev_busy = dev_busy & ~INT_MTA; /* clear busy */
|
|
dev_done = dev_done & ~INT_MTA; /* clear done, int */
|
|
int_req = int_req & ~INT_MTA;
|
|
mta_cu = mta_wc = mta_ma = mta_sta = 0; /* clear registers */
|
|
mta_ep = 0;
|
|
|
|
/* AOS Installer does an IORST after a tape rewind command but before it can
|
|
be serviced, yet expects the tape to have been rewound */
|
|
|
|
for (u = 0; u < MTA_NUMDR; u++) { /* loop thru units */
|
|
uptr = mta_dev.units + u;
|
|
if (sim_is_active (uptr) && /* active and */
|
|
(uptr->flags & STA_REW)) /* rewinding? */
|
|
sim_tape_rewind (uptr); /* update tape */
|
|
sim_tape_reset (uptr); /* clear pos flag */
|
|
sim_cancel (uptr); /* cancel activity */
|
|
if (uptr->flags & UNIT_ATT) uptr->USTAT = STA_RDY |
|
|
(uptr->USTAT & STA_PEM) |
|
|
(sim_tape_wrp (uptr)? STA_WLK: 0) |
|
|
(sim_tape_bot (uptr)? STA_BOT: 0);
|
|
else uptr->USTAT = 0;
|
|
}
|
|
mta_updcsta (&mta_unit[0]); /* update status */
|
|
if (mtxb == NULL)
|
|
mtxb = (uint8 *) calloc (MTA_MAXFR, sizeof (uint8));
|
|
if (mtxb == NULL)
|
|
return SCPE_MEM;
|
|
return SCPE_OK;
|
|
}
|
|
|
|
/* Attach routine */
|
|
|
|
t_stat mta_attach (UNIT *uptr, CONST char *cptr)
|
|
{
|
|
t_stat r;
|
|
|
|
r = sim_tape_attach (uptr, cptr);
|
|
if (r != SCPE_OK)
|
|
return r;
|
|
if (!sim_is_active (uptr))
|
|
mta_upddsta (uptr, STA_RDY | STA_BOT | STA_PEM |
|
|
(sim_tape_wrp (uptr)? STA_WLK: 0));
|
|
return r;
|
|
}
|
|
|
|
/* Detach routine */
|
|
|
|
t_stat mta_detach (UNIT* uptr)
|
|
{
|
|
if (!(uptr->flags & UNIT_ATT)) /* attached? */
|
|
return SCPE_OK;
|
|
if (!sim_is_active (uptr))
|
|
mta_upddsta (uptr, 0);
|
|
return sim_tape_detach (uptr);
|
|
}
|
|
|
|
/* Write lock/unlock validate routine */
|
|
|
|
t_stat mta_vlock (UNIT *uptr, int32 val, CONST char *cptr, void *desc)
|
|
{
|
|
if ((uptr->flags & UNIT_ATT) && (val || sim_tape_wrp (uptr)))
|
|
mta_upddsta (uptr, uptr->USTAT | STA_WLK);
|
|
else mta_upddsta (uptr, uptr->USTAT & ~STA_WLK);
|
|
return SCPE_OK;
|
|
}
|
|
|
|
/* Boot routine */
|
|
|
|
t_stat mta_boot (int32 unitno, DEVICE *dptr)
|
|
{
|
|
sim_tape_rewind( &mta_unit[unitno] ) ;
|
|
/*
|
|
use common rewind/reset code
|
|
device reset
|
|
rewind 'tape' file
|
|
device
|
|
unit
|
|
controller
|
|
*/
|
|
cpu_boot( unitno, dptr ) ;
|
|
SR = 0100000 + DEV_MTA ;
|
|
return ( SCPE_OK );
|
|
} /* end of 'mta_boot' */
|