| /* pdp8_lp.c: PDP-8 line printer simulator | |
| Copyright (c) 1993-2011, Robert M Supnik | |
| Permission is hereby granted, free of charge, to any person obtaining a | |
| copy of this software and associated documentation files (the "Software"), | |
| to deal in the Software without restriction, including without limitation | |
| the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
| and/or sell copies of the Software, and to permit persons to whom the | |
| Software is furnished to do so, subject to the following conditions: | |
| The above copyright notice and this permission notice shall be included in | |
| all copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
| ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | |
| IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
| CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
| Except as contained in this notice, the name of Robert M Supnik shall not be | |
| used in advertising or otherwise to promote the sale, use or other dealings | |
| in this Software without prior written authorization from Robert M Supnik. | |
| lpt LP8E line printer | |
| 19-Jan-07 RMS Added UNIT_TEXT | |
| 25-Apr-03 RMS Revised for extended file support | |
| 04-Oct-02 RMS Added DIB, enable/disable, device number support | |
| 30-May-02 RMS Widened POS to 32b | |
| */ | |
| #include "pdp8_defs.h" | |
| extern int32 int_req, int_enable, dev_done, stop_inst; | |
| int32 lpt_err = 0; /* error flag */ | |
| int32 lpt_stopioe = 0; /* stop on error */ | |
| int32 lpt (int32 IR, int32 AC); | |
| t_stat lpt_svc (UNIT *uptr); | |
| t_stat lpt_reset (DEVICE *dptr); | |
| t_stat lpt_attach (UNIT *uptr, CONST char *cptr); | |
| t_stat lpt_detach (UNIT *uptr); | |
| /* LPT data structures | |
| lpt_dev LPT device descriptor | |
| lpt_unit LPT unit descriptor | |
| lpt_reg LPT register list | |
| */ | |
| DIB lpt_dib = { DEV_LPT, 1, { &lpt } }; | |
| UNIT lpt_unit = { | |
| UDATA (&lpt_svc, UNIT_SEQ+UNIT_ATTABLE+UNIT_TEXT, 0), SERIAL_OUT_WAIT | |
| }; | |
| REG lpt_reg[] = { | |
| { ORDATAD (BUF, lpt_unit.buf, 8,"last data item processed") }, | |
| { FLDATAD (ERR, lpt_err, 0, "error status flag") }, | |
| { FLDATAD (DONE, dev_done, INT_V_LPT, "device done flag") }, | |
| { FLDATAD (ENABLE, int_enable, INT_V_LPT, "interrupt enable flag") }, | |
| { FLDATAD (INT, int_req, INT_V_LPT, "interrupt pending flag") }, | |
| { DRDATAD (POS, lpt_unit.pos, T_ADDR_W, "position in the output file"), PV_LEFT }, | |
| { DRDATAD (TIME, lpt_unit.wait, 24, "time from I/O initiation to interrupt"), PV_LEFT }, | |
| { FLDATAD (STOP_IOE, lpt_stopioe, 0, "stop on I/O error") }, | |
| { ORDATA (DEVNUM, lpt_dib.dev, 6), REG_HRO }, | |
| { NULL } | |
| }; | |
| MTAB lpt_mod[] = { | |
| { MTAB_XTD|MTAB_VDV, 0, "DEVNO", "DEVNO", | |
| &set_dev, &show_dev, NULL }, | |
| { 0 } | |
| }; | |
| DEVICE lpt_dev = { | |
| "LPT", &lpt_unit, lpt_reg, lpt_mod, | |
| 1, 10, 31, 1, 8, 8, | |
| NULL, NULL, &lpt_reset, | |
| NULL, &lpt_attach, &lpt_detach, | |
| &lpt_dib, DEV_DISABLE | |
| }; | |
| /* IOT routine */ | |
| int32 lpt (int32 IR, int32 AC) | |
| { | |
| switch (IR & 07) { /* decode IR<9:11> */ | |
| case 1: /* PSKF */ | |
| return (dev_done & INT_LPT)? IOT_SKP + AC: AC; | |
| case 2: /* PCLF */ | |
| dev_done = dev_done & ~INT_LPT; /* clear flag */ | |
| int_req = int_req & ~INT_LPT; /* clear int req */ | |
| return AC; | |
| case 3: /* PSKE */ | |
| return (lpt_err)? IOT_SKP + AC: AC; | |
| case 6: /* PCLF!PSTB */ | |
| dev_done = dev_done & ~INT_LPT; /* clear flag */ | |
| int_req = int_req & ~INT_LPT; /* clear int req */ | |
| case 4: /* PSTB */ | |
| lpt_unit.buf = AC & 0177; /* load buffer */ | |
| if ((lpt_unit.buf == 015) || (lpt_unit.buf == 014) || | |
| (lpt_unit.buf == 012)) { | |
| sim_activate (&lpt_unit, lpt_unit.wait); | |
| return AC; | |
| } | |
| return (lpt_svc (&lpt_unit) << IOT_V_REASON) + AC; | |
| case 5: /* PSIE */ | |
| int_enable = int_enable | INT_LPT; /* set enable */ | |
| int_req = INT_UPDATE; /* update interrupts */ | |
| return AC; | |
| case 7: /* PCIE */ | |
| int_enable = int_enable & ~INT_LPT; /* clear enable */ | |
| int_req = int_req & ~INT_LPT; /* clear int req */ | |
| return AC; | |
| default: | |
| return (stop_inst << IOT_V_REASON) + AC; | |
| } /* end switch */ | |
| } | |
| /* Unit service */ | |
| t_stat lpt_svc (UNIT *uptr) | |
| { | |
| dev_done = dev_done | INT_LPT; /* set done */ | |
| int_req = INT_UPDATE; /* update interrupts */ | |
| if ((uptr->flags & UNIT_ATT) == 0) { | |
| lpt_err = 1; | |
| return IORETURN (lpt_stopioe, SCPE_UNATT); | |
| } | |
| fputc (uptr->buf, uptr->fileref); /* print char */ | |
| uptr->pos = ftell (uptr->fileref); | |
| if (ferror (uptr->fileref)) { /* error? */ | |
| sim_perror ("LPT I/O error"); | |
| clearerr (uptr->fileref); | |
| return SCPE_IOERR; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Reset routine */ | |
| t_stat lpt_reset (DEVICE *dptr) | |
| { | |
| lpt_unit.buf = 0; | |
| dev_done = dev_done & ~INT_LPT; /* clear done, int */ | |
| int_req = int_req & ~INT_LPT; | |
| int_enable = int_enable | INT_LPT; /* set enable */ | |
| lpt_err = (lpt_unit.flags & UNIT_ATT) == 0; | |
| sim_cancel (&lpt_unit); /* deactivate unit */ | |
| return SCPE_OK; | |
| } | |
| /* Attach routine */ | |
| t_stat lpt_attach (UNIT *uptr, CONST char *cptr) | |
| { | |
| t_stat reason; | |
| reason = attach_unit (uptr, cptr); | |
| lpt_err = (lpt_unit.flags & UNIT_ATT) == 0; | |
| return reason; | |
| } | |
| /* Detach routine */ | |
| t_stat lpt_detach (UNIT *uptr) | |
| { | |
| lpt_err = 1; | |
| return detach_unit (uptr); | |
| } |