| /* pdp1_lp.c: PDP-1 line printer simulator | |
| Copyright (c) 1993-2008, 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 | |
| bused in advertising or otherwise to promote the sale, use or other dealings | |
| in this Software without prior written authorization from Robert M Supnik. | |
| lpt Type 62 line printer for the PDP-1 | |
| 19-Jan-07 RMS Added UNIT_TEXT flag | |
| 21-Dec-06 RMS Added 16-channel SBS support | |
| 07-Sep-03 RMS Changed ioc to ios | |
| 23-Jul-03 RMS Fixed bugs in instruction decoding, overprinting | |
| Revised to detect I/O wait hang | |
| 25-Apr-03 RMS Revised for extended file support | |
| 30-May-02 RMS Widened POS to 32b | |
| 13-Apr-01 RMS Revised for register arrays | |
| */ | |
| #include "pdp1_defs.h" | |
| #define BPTR_MAX 40 /* pointer max */ | |
| #define LPT_BSIZE (BPTR_MAX * 3) /* line size */ | |
| #define BPTR_MASK 077 /* buf ptr mask */ | |
| int32 lpt_spc = 0; /* print (0) vs spc */ | |
| int32 lpt_ovrpr = 0; /* overprint */ | |
| int32 lpt_stopioe = 0; /* stop on error */ | |
| int32 lpt_bptr = 0; /* buffer ptr */ | |
| int32 lpt_sbs = 0; /* SBS level */ | |
| char lpt_buf[LPT_BSIZE + 1] = { 0 }; | |
| static const unsigned char lpt_trans[64] = { | |
| ' ','1','2','3','4','5','6','7','8','9','\'','~','#','V','^','<', | |
| '0','/','S','T','U','V','W','X','Y','Z','"',',','>','^','-','?', | |
| '@','J','K','L','M','N','O','P','Q','R','$','=','-',')','-','(', | |
| '_','A','B','C','D','E','F','G','H','I','*','.','+',']','|','[' | |
| }; | |
| extern int32 ios, cpls, iosta; | |
| extern int32 stop_inst; | |
| t_stat lpt_svc (UNIT *uptr); | |
| t_stat lpt_reset (DEVICE *dptr); | |
| /* LPT data structures | |
| lpt_dev LPT device descriptor | |
| lpt_unit LPT unit | |
| lpt_reg LPT register list | |
| */ | |
| UNIT lpt_unit = { | |
| UDATA (&lpt_svc, UNIT_SEQ+UNIT_ATTABLE+UNIT_TEXT, 0), SERIAL_OUT_WAIT | |
| }; | |
| REG lpt_reg[] = { | |
| { ORDATA (BUF, lpt_unit.buf, 8) }, | |
| { FLDATA (PNT, iosta, IOS_V_PNT) }, | |
| { FLDATA (SPC, iosta, IOS_V_SPC) }, | |
| { FLDATA (RPLS, cpls, CPLS_V_LPT) }, | |
| { DRDATA (BPTR, lpt_bptr, 6) }, | |
| { ORDATA (LPT_STATE, lpt_spc, 6), REG_HRO }, | |
| { FLDATA (LPT_OVRPR, lpt_ovrpr, 0), REG_HRO }, | |
| { DRDATA (POS, lpt_unit.pos, T_ADDR_W), PV_LEFT }, | |
| { DRDATA (TIME, lpt_unit.wait, 24), PV_LEFT }, | |
| { FLDATA (STOP_IOE, lpt_stopioe, 0) }, | |
| { BRDATA (LBUF, lpt_buf, 8, 8, LPT_BSIZE) }, | |
| { DRDATA (SBSLVL, lpt_sbs, 4), REG_HRO }, | |
| { NULL } | |
| }; | |
| MTAB lpt_mod[] = { | |
| { MTAB_XTD|MTAB_VDV, 0, "SBSLVL", "SBSLVL", | |
| &dev_set_sbs, &dev_show_sbs, (void *) &lpt_sbs }, | |
| { 0 } | |
| }; | |
| DEVICE lpt_dev = { | |
| "LPT", &lpt_unit, lpt_reg, lpt_mod, | |
| 1, 10, 31, 1, 8, 8, | |
| NULL, NULL, &lpt_reset, | |
| NULL, NULL, NULL, | |
| NULL, DEV_DISABLE | |
| }; | |
| /* Line printer IOT routine */ | |
| int32 lpt (int32 inst, int32 dev, int32 dat) | |
| { | |
| int32 i; | |
| if (lpt_dev.flags & DEV_DIS) /* disabled? */ | |
| return (stop_inst << IOT_V_REASON) | dat; /* stop if requested */ | |
| if ((inst & 07000) == 01000) { /* fill buf */ | |
| if (lpt_bptr < BPTR_MAX) { /* limit test ptr */ | |
| i = lpt_bptr * 3; /* cvt to chr ptr */ | |
| lpt_buf[i] = lpt_trans[(dat >> 12) & 077]; | |
| lpt_buf[i + 1] = lpt_trans[(dat >> 6) & 077]; | |
| lpt_buf[i + 2] = lpt_trans[dat & 077]; | |
| } | |
| lpt_bptr = (lpt_bptr + 1) & BPTR_MASK; | |
| return dat; | |
| } | |
| if ((inst & 07000) == 02000) { /* space */ | |
| iosta = iosta & ~IOS_SPC; /* space, clear flag */ | |
| lpt_spc = (inst >> 6) & 077; /* state = space n */ | |
| } | |
| else if ((inst & 07000) == 00000) { /* print */ | |
| iosta = iosta & ~IOS_PNT; /* clear flag */ | |
| lpt_spc = 0; /* state = print */ | |
| } | |
| else return (stop_inst << IOT_V_REASON) | dat; /* not implemented */ | |
| if (GEN_CPLS (inst)) { /* comp pulse? */ | |
| ios = 0; /* clear flop */ | |
| cpls = cpls | CPLS_LPT; /* request completion */ | |
| } | |
| else cpls = cpls & ~CPLS_LPT; | |
| sim_activate (&lpt_unit, lpt_unit.wait); /* activate */ | |
| return dat; | |
| } | |
| /* Unit service, printer is in one of three states | |
| lpt_spc = 000 write buffer to file, set overprint | |
| lpt_iot = 02x space command x, clear overprint | |
| */ | |
| t_stat lpt_svc (UNIT *uptr) | |
| { | |
| int32 i; | |
| static const char *lpt_cc[] = { | |
| "\n", | |
| "\n\n", | |
| "\n\n\n", | |
| "\n\n\n\n\n\n", | |
| "\n\n\n\n\n\n\n\n\n\n\n", | |
| "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n", | |
| "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n", | |
| "\f" | |
| }; | |
| if (cpls & CPLS_LPT) { /* completion pulse? */ | |
| ios = 1; /* restart */ | |
| cpls = cpls & ~CPLS_LPT; /* clr pulse pending */ | |
| } | |
| dev_req_int (lpt_sbs); /* req interrupt */ | |
| if (lpt_spc) { /* space? */ | |
| iosta = iosta | IOS_SPC; /* set flag */ | |
| if ((uptr->flags & UNIT_ATT) == 0) /* attached? */ | |
| return IORETURN (lpt_stopioe, SCPE_UNATT); | |
| fputs (lpt_cc[lpt_spc & 07], uptr->fileref); /* print cctl */ | |
| uptr->pos = ftell (uptr->fileref); /* update position */ | |
| if (ferror (uptr->fileref)) { /* error? */ | |
| perror ("LPT I/O error"); | |
| clearerr (uptr->fileref); | |
| return SCPE_IOERR; | |
| } | |
| lpt_ovrpr = 0; /* dont overprint */ | |
| } | |
| else { | |
| iosta = iosta | IOS_PNT; /* print */ | |
| if ((uptr->flags & UNIT_ATT) == 0) /* attached? */ | |
| return IORETURN (lpt_stopioe, SCPE_UNATT); | |
| if (lpt_ovrpr) /* overprint? */ | |
| fputc ('\r', uptr->fileref); | |
| fputs (lpt_buf, uptr->fileref); /* print buffer */ | |
| uptr->pos = ftell (uptr->fileref); /* update position */ | |
| if (ferror (uptr->fileref)) { /* test error */ | |
| perror ("LPT I/O error"); | |
| clearerr (uptr->fileref); | |
| return SCPE_IOERR; | |
| } | |
| lpt_bptr = 0; | |
| for (i = 0; i <= LPT_BSIZE; i++) /* clear buffer */ | |
| lpt_buf[i] = 0; | |
| lpt_ovrpr = 1; /* set overprint */ | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Reset routine */ | |
| t_stat lpt_reset (DEVICE *dptr) | |
| { | |
| int32 i; | |
| lpt_bptr = 0; /* clear buffer ptr */ | |
| for (i = 0; i <= LPT_BSIZE; i++) /* clear buffer */ | |
| lpt_buf[i] = 0; | |
| lpt_spc = 0; /* clear state */ | |
| lpt_ovrpr = 0; /* clear overprint */ | |
| cpls = cpls & ~CPLS_LPT; | |
| iosta = iosta & ~(IOS_PNT | IOS_SPC); /* clear flags */ | |
| sim_cancel (&lpt_unit); /* deactivate unit */ | |
| return SCPE_OK; | |
| } |