ecbb20f1a9
265. PROBLEM: Compiling the HP simulator for 64-bit addressing produces many
conversion warnings.
OBSERVATION: Compiling the simulator and defining USE_INT64 and USE_ADDR64
with implicit conversion warnings enabled reveals a number of places where
assumptions were made that addresses would always be 32 bits. This is a
reasonable assumption, as there are no devices (CPU or peripherals) that
can handle gigabyte addressing. Still, many of these assumptions are not
necessary, and some future peripheral simulator may exceed this limit.
CAUSE: Future expansion to 64-bit addressing was not envisioned.
RESOLUTION: Modify source files to ensure that "t_addr" and "t_value"
types are used instead of "uint32" and "int32" types where addressing and
data values may be 64 bits. Also ensure that valid conversions to smaller
sizes use explicit casts.
266. PROBLEM: BOOT devices require a duplicate S-register declaration.
OBSERVATION: All of the peripheral devices that support the BOOT command
set the select code and other parameters into the S register during the
boot process. This direct register access requires an external declaration
that duplicates the one in the full CPU declarations file (hp2100_cpu.h).
A better method that avoids the duplicate declaration would be for the
"ibl_copy" routine to modify the S register on behalf of the caller.
CAUSE: Poor original implementation.
RESOLUTION: Modify "ibl_copy" (hp2100_cpu.c) to take two additional
parameters that clear and set bits, respectively, in the S register on
behalf of the caller. Modify the boot routines for the CPU, DA, DP, DQ,
DR, DS, IPL, MS, and PTR devices to use the new parameters instead of
modifying the S register directly.
697 lines
28 KiB
C
697 lines
28 KiB
C
/* hp2100_mt.c: HP 2100 12559A magnetic tape simulator
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Copyright (c) 1993-2014, 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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MT 12559A 3030 nine track magnetic tape
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24-Dec-14 JDB Added casts for explicit downward conversions
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10-Jan-13 MP Added DEV_TAPE to DEVICE flags
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09-May-12 JDB Separated assignments from conditional expressions
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25-Mar-12 JDB Removed redundant MTAB_VUN from "format" MTAB entry
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10-Feb-12 JDB Deprecated DEVNO in favor of SC
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28-Mar-11 JDB Tidied up signal handling
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29-Oct-10 JDB Fixed command scanning error in mtcio ioIOO handler
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26-Oct-10 JDB Changed I/O signal handler for revised signal model
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04-Sep-08 JDB Fixed missing flag after CLR command
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02-Sep-08 JDB Moved write enable and format commands from MTD to MTC
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26-Jun-08 JDB Rewrote device I/O to model backplane signals
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28-Dec-06 JDB Added ioCRS state to I/O decoders
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07-Oct-04 JDB Allow enable/disable from either device
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14-Aug-04 RMS Modified handling of end of medium (suggested by Dave Bryan)
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06-Jul-04 RMS Fixed spurious timing error after CLC (found by Dave Bryan)
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26-Apr-04 RMS Fixed SFS x,C and SFC x,C
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Implemented DMA SRQ (follows FLG)
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21-Dec-03 RMS Adjusted msc_ctime for TSB (from Mike Gemeny)
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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-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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20-Jan-02 RMS Fixed bug on last character write
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03-Dec-01 RMS Added read only unit, extended SET/SHOW support
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07-Sep-01 RMS Moved function prototypes
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30-Nov-00 RMS Made variable names unique
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04-Oct-98 RMS V2.4 magtape format
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References:
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- 12559A 9-Track Magnetic Tape Unit Interface Kit Operating and Service Manual
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(12559-9001, Jul-1970)
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- SIMH Magtape Representation and Handling (Bob Supnik, 30-Aug-2006)
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The 3030 was one of HP's earliest tape drives. The 12559A controller
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supported a single 800 bpi, 9-track drive, operating at 75 inches per second.
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It had two unusual characteristics:
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- The controller accepted only one byte per I/O word, rather than packing
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two bytes per word.
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- The drive could not read or write fewer than 12 bytes per record.
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The first behavior meant that DMA operation required the byte-unpacking
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feature of the 12578A DMA card for the 2116 computer. The second meant that
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software drivers had to pad short records with blanks or nulls.
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Implementation notes:
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1. The HP 3030 Magnetic Tape Subsystem diagnostic, part number 20433-60001,
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has never been located, so this simulator has not been fully tested. It
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does pass a functional test under DOS-III using driver DVR22.
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*/
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#include "hp2100_defs.h"
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#include "sim_tape.h"
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#define DB_V_SIZE 16 /* max data buf */
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#define DBSIZE (1 << DB_V_SIZE) /* max data cmd */
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/* Command - mtc_fnc */
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#define FNC_CLR 0300 /* clear */
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#define FNC_WC 0031 /* write */
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#define FNC_RC 0023 /* read */
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#define FNC_GAP 0011 /* write gap */
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#define FNC_FSR 0003 /* forward space */
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#define FNC_BSR 0041 /* backward space */
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#define FNC_REW 0201 /* rewind */
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#define FNC_RWS 0101 /* rewind and offline */
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#define FNC_WFM 0035 /* write file mark */
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/* Status - stored in mtc_sta, (d) = dynamic */
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#define STA_LOCAL 0400 /* local (d) */
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#define STA_EOF 0200 /* end of file */
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#define STA_BOT 0100 /* beginning of tape */
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#define STA_EOT 0040 /* end of tape */
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#define STA_TIM 0020 /* timing error */
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#define STA_REJ 0010 /* programming error */
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#define STA_WLK 0004 /* write locked (d) */
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#define STA_PAR 0002 /* parity error */
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#define STA_BUSY 0001 /* busy (d) */
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struct {
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FLIP_FLOP flag; /* flag flip-flop */
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FLIP_FLOP flagbuf; /* flag buffer flip-flop */
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} mtd = { CLEAR, CLEAR };
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struct {
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FLIP_FLOP control; /* control flip-flop */
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FLIP_FLOP flag; /* flag flip-flop */
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FLIP_FLOP flagbuf; /* flag buffer flip-flop */
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} mtc = { CLEAR, CLEAR, CLEAR };
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int32 mtc_fnc = 0; /* function */
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int32 mtc_sta = 0; /* status register */
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int32 mtc_dtf = 0; /* data xfer flop */
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int32 mtc_1st = 0; /* first svc flop */
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int32 mtc_ctime = 40; /* command wait */
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int32 mtc_gtime = 1000; /* gap stop time */
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int32 mtc_xtime = 15; /* data xfer time */
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int32 mtc_stopioe = 1; /* stop on error */
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uint8 mtxb[DBSIZE] = { 0 }; /* data buffer */
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t_mtrlnt mt_ptr = 0, mt_max = 0; /* buffer ptrs */
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static const uint32 mtc_cmd[] = {
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FNC_WC, FNC_RC, FNC_GAP, FNC_FSR, FNC_BSR, FNC_REW, FNC_RWS, FNC_WFM };
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static const uint32 mtc_cmd_count = sizeof (mtc_cmd) / sizeof (mtc_cmd[0]);
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DEVICE mtd_dev, mtc_dev;
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IOHANDLER mtdio;
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IOHANDLER mtcio;
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t_stat mtc_svc (UNIT *uptr);
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t_stat mt_reset (DEVICE *dptr);
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t_stat mtc_attach (UNIT *uptr, char *cptr);
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t_stat mtc_detach (UNIT *uptr);
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t_stat mt_map_err (UNIT *uptr, t_stat st);
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t_stat mt_clear (void);
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/* MTD data structures
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mtd_dev MTD device descriptor
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mtd_unit MTD unit list
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mtd_reg MTD register list
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*/
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DIB mt_dib[] = {
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{ &mtdio, MTD },
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{ &mtcio, MTC }
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};
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#define mtd_dib mt_dib[0]
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#define mtc_dib mt_dib[1]
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UNIT mtd_unit = { UDATA (NULL, 0, 0) };
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REG mtd_reg[] = {
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{ FLDATA (FLG, mtd.flag, 0) },
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{ FLDATA (FBF, mtd.flagbuf, 0) },
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{ BRDATA (DBUF, mtxb, 8, 8, DBSIZE) },
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{ DRDATA (BPTR, mt_ptr, DB_V_SIZE + 1) },
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{ DRDATA (BMAX, mt_max, DB_V_SIZE + 1) },
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{ ORDATA (SC, mtd_dib.select_code, 6), REG_HRO },
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{ ORDATA (DEVNO, mtd_dib.select_code, 6), REG_HRO },
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{ NULL }
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};
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MTAB mtd_mod[] = {
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{ MTAB_XTD | MTAB_VDV, 1, "SC", "SC", &hp_setsc, &hp_showsc, &mtd_dev },
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{ MTAB_XTD | MTAB_VDV | MTAB_NMO, 1, "DEVNO", "DEVNO", &hp_setdev, &hp_showdev, &mtd_dev },
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{ 0 }
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};
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DEVICE mtd_dev = {
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"MTD", &mtd_unit, mtd_reg, mtd_mod,
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1, 10, 16, 1, 8, 8,
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NULL, NULL, &mt_reset,
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NULL, NULL, NULL,
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&mtd_dib, DEV_DISABLE | DEV_DIS
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};
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/* MTC data structures
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mtc_dev MTC device descriptor
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mtc_unit MTC unit list
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mtc_reg MTC register list
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mtc_mod MTC modifier list
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*/
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UNIT mtc_unit = { UDATA (&mtc_svc, UNIT_ATTABLE + UNIT_ROABLE, 0) };
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REG mtc_reg[] = {
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{ ORDATA (FNC, mtc_fnc, 8) },
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{ ORDATA (STA, mtc_sta, 9) },
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{ ORDATA (BUF, mtc_unit.buf, 8) },
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{ FLDATA (CTL, mtc.control, 0) },
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{ FLDATA (FLG, mtc.flag, 0) },
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{ FLDATA (FBF, mtc.flagbuf, 0) },
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{ FLDATA (DTF, mtc_dtf, 0) },
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{ FLDATA (FSVC, mtc_1st, 0) },
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{ DRDATA (POS, mtc_unit.pos, T_ADDR_W), PV_LEFT },
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{ DRDATA (CTIME, mtc_ctime, 24), REG_NZ + PV_LEFT },
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{ DRDATA (GTIME, mtc_gtime, 24), REG_NZ + PV_LEFT },
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{ DRDATA (XTIME, mtc_xtime, 24), REG_NZ + PV_LEFT },
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{ FLDATA (STOP_IOE, mtc_stopioe, 0) },
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{ ORDATA (SC, mtc_dib.select_code, 6), REG_HRO },
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{ ORDATA (DEVNO, mtc_dib.select_code, 6), REG_HRO },
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{ NULL }
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};
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MTAB mtc_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_VDV, 0, "FORMAT", "FORMAT",
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&sim_tape_set_fmt, &sim_tape_show_fmt, NULL },
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{ MTAB_XTD | MTAB_VDV, 1, "SC", "SC", &hp_setsc, &hp_showsc, &mtd_dev },
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{ MTAB_XTD | MTAB_VDV | MTAB_NMO, 1, "DEVNO", "DEVNO", &hp_setdev, &hp_showdev, &mtd_dev },
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{ 0 }
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};
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DEVICE mtc_dev = {
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"MTC", &mtc_unit, mtc_reg, mtc_mod,
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1, 10, 31, 1, 8, 8,
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NULL, NULL, &mt_reset,
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NULL, &mtc_attach, &mtc_detach,
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&mtc_dib, DEV_DISABLE | DEV_DIS | DEV_TAPE
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};
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/* Data channel I/O signal handler
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The 12559A data channel interface has a number of non-standard features:
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- The card does not drive PRL or IRQ.
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- The card does not respond to IAK.
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- There is no control flip-flop; CLC resets the data transfer flip-flop.
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- POPIO issues a CLR command and clears the flag and flag buffer flip-flops.
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- CRS is not used.
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Implementation notes:
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1. The data channel has a flag buffer flip-flop (necessary for the proper
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timing of the flag flip-flop), but the data channel does not interrupt,
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so the flag buffer serves no other purpose.
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*/
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uint32 mtdio (DIB *dibptr, IOCYCLE signal_set, uint32 stat_data)
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{
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IOSIGNAL signal;
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IOCYCLE working_set = IOADDSIR (signal_set); /* add ioSIR if needed */
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while (working_set) {
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signal = IONEXT (working_set); /* isolate next signal */
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switch (signal) { /* dispatch I/O signal */
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case ioCLF: /* clear flag flip-flop */
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mtd.flag = mtd.flagbuf = CLEAR;
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break;
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case ioSTF: /* set flag flip-flop */
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case ioENF: /* enable flag */
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mtd.flag = mtd.flagbuf = SET;
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break;
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case ioSFC: /* skip if flag is clear */
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setstdSKF (mtd);
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break;
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case ioSFS: /* skip if flag is set */
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setstdSKF (mtd);
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break;
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case ioIOI: /* I/O data input */
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stat_data = IORETURN (SCPE_OK, mtc_unit.buf); /* merge in return status */
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break;
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case ioIOO: /* I/O data output */
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mtc_unit.buf = IODATA (stat_data) & DMASK8; /* store data */
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break;
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case ioPOPIO: /* power-on preset to I/O */
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mt_clear (); /* issue CLR to controller */
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mtd.flag = mtd.flagbuf = CLEAR; /* clear flag and flag buffer */
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break;
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case ioCLC: /* clear control flip-flop */
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mtc_dtf = 0; /* clr xfer flop */
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mtd.flag = mtd.flagbuf = CLEAR; /* clear flag and flag buffer */
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break;
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case ioSIR: /* set interrupt request */
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setstdSRQ (mtd); /* set standard SRQ signal */
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break;
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default: /* all other signals */
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break; /* are ignored */
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}
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working_set = working_set & ~signal; /* remove current signal from set */
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}
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return stat_data;
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}
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/* Command channel I/O signal handler.
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The 12559A command interface is reasonably standard, although POPIO clears,
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rather than sets, the flag and flag buffer flip-flops. One unusual feature
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is that commands are initiated when they are output to the interface with
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OTA/B, rather than waiting until control is set with STC. STC simply enables
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command-channel interrupts.
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Implementation notes:
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1. In hardware, the command channel card passes PRH to PRL. The data card
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actually drives PRL with the command channel's control and flag states.
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That is, the priority chain is broken at the data card, although the
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command card is interrupting. This works in hardware, but we must break
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PRL at the command card under simulation to allow the command card to
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interrupt.
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2. In hardware, the CLR command takes 5 milliseconds to complete. During
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this time, the BUSY bit is set in the status word. Under simulation, we
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complete immediately, and the BUSY bit never sets..
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*/
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uint32 mtcio (DIB *dibptr, IOCYCLE signal_set, uint32 stat_data)
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{
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uint16 data;
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uint32 i;
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int32 valid;
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IOSIGNAL signal;
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IOCYCLE working_set = IOADDSIR (signal_set); /* add ioSIR if needed */
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while (working_set) {
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signal = IONEXT (working_set); /* isolate next signal */
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switch (signal) { /* dispatch I/O signal */
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case ioCLF: /* clear flag flip-flop */
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mtc.flag = mtc.flagbuf = CLEAR;
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break;
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case ioSTF: /* set flag flip-flop */
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case ioENF: /* enable flag */
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mtc.flag = mtc.flagbuf = SET;
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break;
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case ioSFC: /* skip if flag is clear */
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setstdSKF (mtc);
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break;
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case ioSFS: /* skip if flag is set */
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setstdSKF (mtc);
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break;
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case ioIOI: /* I/O data input */
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data = mtc_sta & ~(STA_LOCAL | STA_WLK | STA_BUSY);
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if (mtc_unit.flags & UNIT_ATT) { /* construct status */
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if (sim_is_active (&mtc_unit))
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data = data | STA_BUSY;
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if (sim_tape_wrp (&mtc_unit))
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data = data | STA_WLK;
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}
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else
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data = data | STA_BUSY | STA_LOCAL;
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stat_data = IORETURN (SCPE_OK, data); /* merge in return status */
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break;
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case ioIOO: /* I/O data output */
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data = IODATA (stat_data) & DMASK8;
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mtc_sta = mtc_sta & ~STA_REJ; /* clear reject */
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if (data == FNC_CLR) { /* clear? */
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mt_clear (); /* send CLR to controller */
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mtd.flag = mtd.flagbuf = CLEAR; /* clear data flag and flag buffer */
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mtc.flag = mtc.flagbuf = SET; /* set command flag and flag buffer */
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break; /* command completes immediately */
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}
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for (i = valid = 0; i < mtc_cmd_count; i++) /* is fnc valid? */
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if (data == mtc_cmd[i]) {
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valid = 1;
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break;
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}
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if (!valid || sim_is_active (&mtc_unit) || /* is cmd valid? */
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((mtc_sta & STA_BOT) && (data == FNC_BSR)) ||
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(sim_tape_wrp (&mtc_unit) &&
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((data == FNC_WC) || (data == FNC_GAP) || (data == FNC_WFM))))
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mtc_sta = mtc_sta | STA_REJ;
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else {
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sim_activate (&mtc_unit, mtc_ctime); /* start tape */
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mtc_fnc = data; /* save function */
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mtc_sta = STA_BUSY; /* unit busy */
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mt_ptr = 0; /* init buffer ptr */
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mtcio (&mtc_dib, ioCLF, 0); /* clear flags */
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mtcio (&mtd_dib, ioCLF, 0);
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mtc_1st = 1; /* set 1st flop */
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mtc_dtf = 1; /* set xfer flop */
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}
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break;
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case ioPOPIO: /* power-on preset to I/O */
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mtc.flag = mtc.flagbuf = CLEAR; /* clear flag and flag buffer */
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break;
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case ioCRS: /* control reset */
|
|
case ioCLC: /* clear control flip-flop */
|
|
mtc.control = CLEAR;
|
|
break;
|
|
|
|
|
|
case ioSTC: /* set control flip-flop */
|
|
mtc.control = SET;
|
|
break;
|
|
|
|
|
|
case ioSIR: /* set interrupt request */
|
|
setstdPRL (mtc); /* set standard PRL signal */
|
|
setstdIRQ (mtc); /* set standard IRQ signal */
|
|
setstdSRQ (mtc); /* set standard SRQ signal */
|
|
break;
|
|
|
|
case ioIAK: /* interrupt acknowledge */
|
|
mtc.flagbuf = CLEAR;
|
|
break;
|
|
|
|
|
|
default: /* all other signals */
|
|
break; /* are ignored */
|
|
}
|
|
|
|
working_set = working_set & ~signal; /* remove current signal from set */
|
|
}
|
|
|
|
return stat_data;
|
|
}
|
|
|
|
|
|
/* Unit service
|
|
|
|
If rewind done, reposition to start of tape, set status
|
|
else, do operation, set done, interrupt
|
|
|
|
Can't be write locked, can only write lock detached unit
|
|
*/
|
|
|
|
t_stat mtc_svc (UNIT *uptr)
|
|
{
|
|
t_mtrlnt tbc;
|
|
t_stat st, r = SCPE_OK;
|
|
|
|
if ((mtc_unit.flags & UNIT_ATT) == 0) { /* offline? */
|
|
mtc_sta = STA_LOCAL | STA_REJ; /* rejected */
|
|
mtcio (&mtc_dib, ioENF, 0); /* set cch flg */
|
|
return IOERROR (mtc_stopioe, SCPE_UNATT);
|
|
}
|
|
|
|
switch (mtc_fnc) { /* case on function */
|
|
|
|
case FNC_REW: /* rewind */
|
|
sim_tape_rewind (uptr); /* BOT */
|
|
mtc_sta = STA_BOT; /* update status */
|
|
break;
|
|
|
|
case FNC_RWS: /* rewind and offline */
|
|
sim_tape_rewind (uptr); /* clear position */
|
|
return sim_tape_detach (uptr); /* don't set cch flg */
|
|
|
|
case FNC_WFM: /* write file mark */
|
|
st = sim_tape_wrtmk (uptr); /* write tmk */
|
|
if (st != MTSE_OK) /* error? */
|
|
r = mt_map_err (uptr, st); /* map error */
|
|
mtc_sta = STA_EOF; /* set EOF status */
|
|
break;
|
|
|
|
case FNC_GAP: /* erase gap */
|
|
break;
|
|
|
|
case FNC_FSR: /* space forward */
|
|
st = sim_tape_sprecf (uptr, &tbc); /* space rec fwd */
|
|
if (st != MTSE_OK) /* error? */
|
|
r = mt_map_err (uptr, st); /* map error */
|
|
break;
|
|
|
|
case FNC_BSR: /* space reverse */
|
|
st = sim_tape_sprecr (uptr, &tbc); /* space rec rev */
|
|
if (st != MTSE_OK) /* error? */
|
|
r = mt_map_err (uptr, st); /* map error */
|
|
break;
|
|
|
|
case FNC_RC: /* read */
|
|
if (mtc_1st) { /* first svc? */
|
|
mtc_1st = mt_ptr = 0; /* clr 1st flop */
|
|
st = sim_tape_rdrecf (uptr, mtxb, &mt_max, DBSIZE); /* read rec */
|
|
if (st == MTSE_RECE) mtc_sta = mtc_sta | STA_PAR; /* rec in err? */
|
|
else if (st != MTSE_OK) { /* other error? */
|
|
r = mt_map_err (uptr, st); /* map error */
|
|
if (r == SCPE_OK) { /* recoverable? */
|
|
sim_activate (uptr, mtc_gtime); /* sched IRG */
|
|
mtc_fnc = 0; /* NOP func */
|
|
return SCPE_OK;
|
|
}
|
|
break; /* non-recov, done */
|
|
}
|
|
if (mt_max < 12) { /* record too short? */
|
|
mtc_sta = mtc_sta | STA_PAR; /* set flag */
|
|
break;
|
|
}
|
|
}
|
|
if (mtc_dtf && (mt_ptr < mt_max)) { /* more chars? */
|
|
if (mtd.flag) mtc_sta = mtc_sta | STA_TIM;
|
|
mtc_unit.buf = mtxb[mt_ptr++]; /* fetch next */
|
|
mtdio (&mtd_dib, ioENF, 0); /* set dch flg */
|
|
sim_activate (uptr, mtc_xtime); /* re-activate */
|
|
return SCPE_OK;
|
|
}
|
|
sim_activate (uptr, mtc_gtime); /* schedule gap */
|
|
mtc_fnc = 0; /* nop */
|
|
return SCPE_OK;
|
|
|
|
case FNC_WC: /* write */
|
|
if (mtc_1st) mtc_1st = 0; /* no xfr on first */
|
|
else {
|
|
if (mt_ptr < DBSIZE) { /* room in buffer? */
|
|
mtxb[mt_ptr++] = (uint8) mtc_unit.buf;
|
|
mtc_sta = mtc_sta & ~STA_BOT; /* clear BOT */
|
|
}
|
|
else mtc_sta = mtc_sta | STA_PAR;
|
|
}
|
|
if (mtc_dtf) { /* xfer flop set? */
|
|
mtdio (&mtd_dib, ioENF, 0); /* set dch flg */
|
|
sim_activate (uptr, mtc_xtime); /* re-activate */
|
|
return SCPE_OK;
|
|
}
|
|
if (mt_ptr) { /* write buffer */
|
|
st = sim_tape_wrrecf (uptr, mtxb, mt_ptr); /* write */
|
|
if (st != MTSE_OK) { /* error? */
|
|
r = mt_map_err (uptr, st); /* map error */
|
|
break; /* done */
|
|
}
|
|
}
|
|
sim_activate (uptr, mtc_gtime); /* schedule gap */
|
|
mtc_fnc = 0; /* nop */
|
|
return SCPE_OK;
|
|
|
|
default: /* unknown */
|
|
break;
|
|
}
|
|
|
|
mtcio (&mtc_dib, ioENF, 0); /* set cch flg */
|
|
mtc_sta = mtc_sta & ~STA_BUSY; /* not busy */
|
|
return r;
|
|
}
|
|
|
|
/* Map tape error status */
|
|
|
|
t_stat mt_map_err (UNIT *uptr, t_stat st)
|
|
{
|
|
switch (st) {
|
|
|
|
case MTSE_FMT: /* illegal fmt */
|
|
case MTSE_UNATT: /* unattached */
|
|
mtc_sta = mtc_sta | STA_REJ; /* reject */
|
|
case MTSE_OK: /* no error */
|
|
return SCPE_IERR; /* never get here! */
|
|
|
|
case MTSE_EOM: /* end of medium */
|
|
case MTSE_TMK: /* end of file */
|
|
mtc_sta = mtc_sta | STA_EOF; /* eof */
|
|
break;
|
|
|
|
case MTSE_IOERR: /* IO error */
|
|
mtc_sta = mtc_sta | STA_PAR; /* error */
|
|
if (mtc_stopioe) return SCPE_IOERR;
|
|
break;
|
|
|
|
case MTSE_INVRL: /* invalid rec lnt */
|
|
mtc_sta = mtc_sta | STA_PAR;
|
|
return SCPE_MTRLNT;
|
|
|
|
case MTSE_RECE: /* record in error */
|
|
mtc_sta = mtc_sta | STA_PAR; /* error */
|
|
break;
|
|
|
|
case MTSE_BOT: /* reverse into BOT */
|
|
mtc_sta = mtc_sta | STA_BOT; /* set status */
|
|
break;
|
|
|
|
case MTSE_WRP: /* write protect */
|
|
mtc_sta = mtc_sta | STA_REJ; /* reject */
|
|
break;
|
|
}
|
|
|
|
return SCPE_OK;
|
|
}
|
|
|
|
|
|
/* Controller clear */
|
|
|
|
t_stat mt_clear (void)
|
|
{
|
|
t_stat st;
|
|
|
|
if (sim_is_active (&mtc_unit) && /* write in prog? */
|
|
(mtc_fnc == FNC_WC) && (mt_ptr > 0)) { /* yes, bad rec */
|
|
st = sim_tape_wrrecf (&mtc_unit, mtxb, mt_ptr | MTR_ERF);
|
|
if (st != MTSE_OK)
|
|
mt_map_err (&mtc_unit, st);
|
|
}
|
|
|
|
if (((mtc_fnc == FNC_REW) || (mtc_fnc == FNC_RWS)) && sim_is_active (&mtc_unit))
|
|
sim_cancel (&mtc_unit);
|
|
|
|
mtc_1st = mtc_dtf = 0;
|
|
mtc_sta = mtc_sta & STA_BOT;
|
|
|
|
return SCPE_OK;
|
|
}
|
|
|
|
|
|
/* Reset routine */
|
|
|
|
t_stat mt_reset (DEVICE *dptr)
|
|
{
|
|
DIB *dibptr = (DIB *) dptr->ctxt; /* DIB pointer */
|
|
|
|
hp_enbdis_pair (dptr, /* make pair cons */
|
|
(dptr == &mtd_dev) ? &mtc_dev : &mtd_dev);
|
|
|
|
IOPRESET (dibptr); /* PRESET device (does not use PON) */
|
|
|
|
mtc_fnc = 0;
|
|
mtc_1st = mtc_dtf = 0;
|
|
|
|
sim_cancel (&mtc_unit); /* cancel activity */
|
|
sim_tape_reset (&mtc_unit);
|
|
|
|
if (mtc_unit.flags & UNIT_ATT)
|
|
mtc_sta = (sim_tape_bot (&mtc_unit)? STA_BOT: 0) |
|
|
(sim_tape_wrp (&mtc_unit)? STA_WLK: 0);
|
|
else
|
|
mtc_sta = STA_LOCAL | STA_BUSY;
|
|
|
|
return SCPE_OK;
|
|
}
|
|
|
|
|
|
/* Attach routine */
|
|
|
|
t_stat mtc_attach (UNIT *uptr, char *cptr)
|
|
{
|
|
t_stat r;
|
|
|
|
r = sim_tape_attach (uptr, cptr); /* attach unit */
|
|
if (r != SCPE_OK) return r; /* update status */
|
|
mtc_sta = STA_BOT;
|
|
return r;
|
|
}
|
|
|
|
/* Detach routine */
|
|
|
|
t_stat mtc_detach (UNIT* uptr)
|
|
{
|
|
mtc_sta = 0; /* update status */
|
|
return sim_tape_detach (uptr); /* detach unit */
|
|
}
|