188 lines
6.7 KiB
C
188 lines
6.7 KiB
C
/* pdp8_lp.c: PDP-8 line printer simulator
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Copyright (c) 1993-2016, 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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lpt LP8E line printer
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16-Dec-16 DJG Added IOT 6660 to allow WPS WS78 3.4 to print
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19-Jan-07 RMS Added UNIT_TEXT
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25-Apr-03 RMS Revised for extended file support
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04-Oct-02 RMS Added DIB, enable/disable, device number support
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30-May-02 RMS Widened POS to 32b
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*/
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#include "pdp8_defs.h"
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extern int32 int_req, int_enable, dev_done, stop_inst;
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int32 lpt_err = 0; /* error flag */
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int32 lpt_stopioe = 0; /* stop on error */
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int32 lpt (int32 IR, int32 AC);
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t_stat lpt_svc (UNIT *uptr);
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t_stat lpt_reset (DEVICE *dptr);
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t_stat lpt_attach (UNIT *uptr, CONST char *cptr);
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t_stat lpt_detach (UNIT *uptr);
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/* LPT data structures
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lpt_dev LPT device descriptor
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lpt_unit LPT unit descriptor
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lpt_reg LPT register list
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*/
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DIB lpt_dib = { DEV_LPT, 1, { &lpt } };
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UNIT lpt_unit = {
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UDATA (&lpt_svc, UNIT_SEQ+UNIT_ATTABLE+UNIT_TEXT, 0), SERIAL_OUT_WAIT
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};
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REG lpt_reg[] = {
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{ ORDATAD (BUF, lpt_unit.buf, 8,"last data item processed") },
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{ FLDATAD (ERR, lpt_err, 0, "error status flag") },
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{ FLDATAD (DONE, dev_done, INT_V_LPT, "device done flag") },
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{ FLDATAD (ENABLE, int_enable, INT_V_LPT, "interrupt enable flag") },
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{ FLDATAD (INT, int_req, INT_V_LPT, "interrupt pending flag") },
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{ DRDATAD (POS, lpt_unit.pos, T_ADDR_W, "position in the output file"), PV_LEFT },
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{ DRDATAD (TIME, lpt_unit.wait, 24, "time from I/O initiation to interrupt"), PV_LEFT },
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{ FLDATAD (STOP_IOE, lpt_stopioe, 0, "stop on I/O error") },
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{ ORDATA (DEVNUM, lpt_dib.dev, 6), REG_HRO },
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{ NULL }
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};
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MTAB lpt_mod[] = {
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{ MTAB_XTD|MTAB_VDV, 0, "DEVNO", "DEVNO",
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&set_dev, &show_dev, NULL },
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{ 0 }
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};
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DEVICE lpt_dev = {
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"LPT", &lpt_unit, lpt_reg, lpt_mod,
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1, 10, 31, 1, 8, 8,
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NULL, NULL, &lpt_reset,
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NULL, &lpt_attach, &lpt_detach,
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&lpt_dib, DEV_DISABLE
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};
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/* IOT routine */
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int32 lpt (int32 IR, int32 AC)
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{
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switch (IR & 07) { /* decode IR<9:11> */
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case 0: /* PKSTF */
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dev_done = dev_done | INT_LPT; /* set flag */
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int_req = INT_UPDATE; /* update interrupts */
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return AC;
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case 1: /* PSKF */
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return (dev_done & INT_LPT)? IOT_SKP + AC: AC;
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case 2: /* PCLF */
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dev_done = dev_done & ~INT_LPT; /* clear flag */
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int_req = int_req & ~INT_LPT; /* clear int req */
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return AC;
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case 3: /* PSKE */
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return (lpt_err)? IOT_SKP + AC: AC;
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case 6: /* PCLF!PSTB */
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dev_done = dev_done & ~INT_LPT; /* clear flag */
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int_req = int_req & ~INT_LPT; /* clear int req */
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case 4: /* PSTB */
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lpt_unit.buf = AC & 0177; /* load buffer */
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if ((lpt_unit.buf == 015) || (lpt_unit.buf == 014) ||
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(lpt_unit.buf == 012)) {
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sim_activate (&lpt_unit, lpt_unit.wait);
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return AC;
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}
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return (lpt_svc (&lpt_unit) << IOT_V_REASON) + AC;
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case 5: /* PSIE */
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int_enable = int_enable | INT_LPT; /* set enable */
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int_req = INT_UPDATE; /* update interrupts */
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return AC;
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case 7: /* PCIE */
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int_enable = int_enable & ~INT_LPT; /* clear enable */
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int_req = int_req & ~INT_LPT; /* clear int req */
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return AC;
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default:
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return (stop_inst << IOT_V_REASON) + AC;
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} /* end switch */
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}
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/* Unit service */
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t_stat lpt_svc (UNIT *uptr)
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{
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dev_done = dev_done | INT_LPT; /* set done */
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int_req = INT_UPDATE; /* update interrupts */
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if ((uptr->flags & UNIT_ATT) == 0) {
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lpt_err = 1;
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return IORETURN (lpt_stopioe, SCPE_UNATT);
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}
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fputc (uptr->buf, uptr->fileref); /* print char */
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uptr->pos = ftell (uptr->fileref);
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if (ferror (uptr->fileref)) { /* error? */
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sim_perror ("LPT I/O error");
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clearerr (uptr->fileref);
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return SCPE_IOERR;
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}
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return SCPE_OK;
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}
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/* Reset routine */
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t_stat lpt_reset (DEVICE *dptr)
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{
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lpt_unit.buf = 0;
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dev_done = dev_done & ~INT_LPT; /* clear done, int */
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int_req = int_req & ~INT_LPT;
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int_enable = int_enable | INT_LPT; /* set enable */
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lpt_err = (lpt_unit.flags & UNIT_ATT) == 0;
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sim_cancel (&lpt_unit); /* deactivate unit */
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return SCPE_OK;
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}
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/* Attach routine */
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t_stat lpt_attach (UNIT *uptr, CONST char *cptr)
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{
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t_stat reason;
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reason = attach_unit (uptr, cptr);
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lpt_err = (lpt_unit.flags & UNIT_ATT) == 0;
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return reason;
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}
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/* Detach routine */
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t_stat lpt_detach (UNIT *uptr)
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{
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lpt_err = 1;
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return detach_unit (uptr);
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}
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