| /* pdp10_lp20.c: PDP-10 LP20 line printer simulator | |
| Copyright (c) 1993-2007, 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. | |
| lp20 line printer | |
| 19-Jan-07 RMS Added UNIT_TEXT flag | |
| 04-Sep-05 RMS Fixed missing return (found by Peter Schorn) | |
| 07-Jul-05 RMS Removed extraneous externs | |
| 18-Mar-05 RMS Added attached test to detach routine | |
| 29-Dec-03 RMS Fixed bug in scheduling | |
| 25-Apr-03 RMS Revised for extended file support | |
| 29-Sep-02 RMS Added variable vector support | |
| Modified to use common Unibus routines | |
| New data structures | |
| 30-May-02 RMS Widened POS to 32b | |
| 06-Jan-02 RMS Added enable/disable support | |
| 30-Nov-01 RMS Added extended SET/SHOW support | |
| */ | |
| #include "pdp10_defs.h" | |
| #define UNIT_DUMMY (1 << UNIT_V_UF) | |
| #define LP_WIDTH 132 /* printer width */ | |
| /* DAVFU RAM */ | |
| #define DV_SIZE 143 /* DAVFU size */ | |
| #define DV_DMASK 077 /* data mask per byte */ | |
| #define DV_TOF 0 /* top of form channel */ | |
| #define DV_MAX 11 /* max channel number */ | |
| /* Translation RAM */ | |
| #define TX_SIZE 256 /* translation RAM */ | |
| #define TX_AMASK (TX_SIZE - 1) | |
| #define TX_DMASK 07777 | |
| #define TX_V_FL 8 /* flags */ | |
| #define TX_M_FL 017 | |
| /* define TX_INTR 04000 /* interrupt */ | |
| #define TX_DELH 02000 /* delimiter */ | |
| /* define TX_XLAT 01000 /* translate */ | |
| /* define TX_DVFU 00400 /* DAVFU */ | |
| #define TX_SLEW 00020 /* chan vs slew */ | |
| #define TX_VMASK 00017 /* spacing mask */ | |
| #define TX_CHR 0 /* states: pr char */ | |
| #define TX_RAM 1 /* pr translation */ | |
| #define TX_DVU 2 /* DAVFU action */ | |
| #define TX_INT 3 /* interrupt */ | |
| #define TX_GETFL(x) (((x) >> TX_V_FL) & TX_M_FL) | |
| /* LPCSRA (765400) */ | |
| #define CSA_GO 0000001 /* go */ | |
| #define CSA_PAR 0000002 /* parity enable NI */ | |
| #define CSA_V_FNC 2 /* function */ | |
| #define CSA_M_FNC 03 | |
| #define FNC_PR 0 /* print */ | |
| #define FNC_TST 1 /* test */ | |
| #define FNC_DVU 2 /* load DAVFU */ | |
| #define FNC_RAM 3 /* load translation RAM */ | |
| #define FNC_INTERNAL 1 /* internal function */ | |
| #define CSA_FNC (CSA_M_FNC << CSA_V_FNC) | |
| #define CSA_V_UAE 4 /* Unibus addr extension */ | |
| #define CSA_UAE (03 << CSA_V_UAE) | |
| #define CSA_IE 0000100 /* interrupt enable */ | |
| #define CSA_DONE 0000200 /* done */ | |
| #define CSA_INIT 0000400 /* init */ | |
| #define CSA_ECLR 0001000 /* clear errors */ | |
| #define CSA_DELH 0002000 /* delimiter hold */ | |
| #define CSA_ONL 0004000 /* online */ | |
| #define CSA_DVON 0010000 /* DAVFU online */ | |
| #define CSA_UNDF 0020000 /* undefined char */ | |
| #define CSA_PZRO 0040000 /* page counter zero */ | |
| #define CSA_ERR 0100000 /* error */ | |
| #define CSA_RW (CSA_DELH | CSA_IE | CSA_UAE | CSA_FNC | CSA_PAR | CSA_GO) | |
| #define CSA_MBZ (CSA_ECLR | CSA_INIT) | |
| #define CSA_GETUAE(x) (((x) & CSA_UAE) << (16 - CSA_V_UAE)) | |
| #define CSA_GETFNC(x) (((x) >> CSA_V_FNC) & CSA_M_FNC) | |
| /* LPCSRB (765402) */ | |
| #define CSB_GOE 0000001 /* go error */ | |
| #define CSB_DTE 0000002 /* DEM timing error NI */ | |
| #define CSB_MTE 0000004 /* MSYN error (Ubus timeout) */ | |
| #define CSB_RPE 0000010 /* RAM parity error NI */ | |
| #define CSB_MPE 0000020 /* MEM parity error NI */ | |
| #define CSB_LPE 0000040 /* LPT parity error NI */ | |
| #define CSB_DVOF 0000100 /* DAVFU not ready */ | |
| #define CSB_OFFL 0000200 /* offline */ | |
| #define CSB_TEST 0003400 /* test mode */ | |
| #define CSB_OVFU 0004000 /* optical VFU NI */ | |
| #define CSB_PBIT 0010000 /* data parity bit NI */ | |
| #define CSB_NRDY 0020000 /* printer error NI */ | |
| #define CSB_LA180 0040000 /* LA180 printer NI */ | |
| #define CSB_VLD 0100000 /* valid data NI */ | |
| #define CSB_ECLR (CSB_GOE | CSB_DTE | CSB_MTE | CSB_RPE | CSB_MPE | CSB_LPE) | |
| #define CSB_ERR (CSB_ECLR | CSB_DVOF | CSB_OFFL) | |
| #define CSB_RW CSB_TEST | |
| #define CSB_MBZ (CSB_DTE | CSB_RPE | CSB_MPE | CSB_LPE | CSB_OVFU |\ | |
| CSB_PBIT | CSB_NRDY | CSB_LA180 | CSB_VLD) | |
| /* LPBA (765404) */ | |
| /* LPBC (765506) */ | |
| #define BC_MASK 0007777 /* <15:12> MBZ */ | |
| /* LPPAGC (765510) */ | |
| #define PAGC_MASK 0007777 /* <15:12> MBZ */ | |
| /* LPRDAT (765512) */ | |
| #define RDAT_MASK 0007777 /* <15:12> MBZ */ | |
| /* LPCOLC/LPCBUF (765514) */ | |
| /* LPCSUM/LPPDAT (765516) */ | |
| extern d10 *M; /* main memory */ | |
| extern int32 int_req; | |
| int32 lpcsa = 0; /* control/status A */ | |
| int32 lpcsb = 0; /* control/status B */ | |
| int32 lpba = 0; /* bus address */ | |
| int32 lpbc = 0; /* byte count */ | |
| int32 lppagc = 0; /* page count */ | |
| int32 lprdat = 0; /* RAM data */ | |
| int32 lpcbuf = 0; /* character buffer */ | |
| int32 lpcolc = 0; /* column count */ | |
| int32 lppdat = 0; /* printer data */ | |
| int32 lpcsum = 0; /* checksum */ | |
| int32 dvptr = 0; /* davfu pointer */ | |
| int32 dvlnt = 0; /* davfu length */ | |
| int32 lp20_irq = 0; /* int request */ | |
| int32 lp20_stopioe = 0; /* stop on error */ | |
| int16 txram[TX_SIZE] = { 0 }; /* translation RAM */ | |
| int16 davfu[DV_SIZE] = { 0 }; /* DAVFU */ | |
| DEVICE lp20_dev; | |
| t_stat lp20_rd (int32 *data, int32 pa, int32 access); | |
| t_stat lp20_wr (int32 data, int32 pa, int32 access); | |
| int32 lp20_inta (void); | |
| t_stat lp20_svc (UNIT *uptr); | |
| t_stat lp20_reset (DEVICE *dptr); | |
| t_stat lp20_attach (UNIT *uptr, char *ptr); | |
| t_stat lp20_detach (UNIT *uptr); | |
| t_stat lp20_clear_vfu (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| t_bool lp20_print (int32 c); | |
| t_bool lp20_adv (int32 c, t_bool advdvu); | |
| t_bool lp20_davfu (int32 c); | |
| void update_lpcs (int32 flg); | |
| /* LP data structures | |
| lp20_dev LPT device descriptor | |
| lp20_unit LPT unit descriptor | |
| lp20_reg LPT register list | |
| */ | |
| DIB lp20_dib = { | |
| IOBA_LP20, IOLN_LP20, &lp20_rd, &lp20_wr, | |
| 1, IVCL (LP20), VEC_LP20, { &lp20_inta } | |
| }; | |
| UNIT lp20_unit = { | |
| UDATA (&lp20_svc, UNIT_SEQ+UNIT_ATTABLE+UNIT_TEXT, 0), SERIAL_OUT_WAIT | |
| }; | |
| REG lp20_reg[] = { | |
| { ORDATA (LPCSA, lpcsa, 16) }, | |
| { ORDATA (LPCSB, lpcsb, 16) }, | |
| { ORDATA (LPBA, lpba, 16) }, | |
| { ORDATA (LPBC, lpbc, 12) }, | |
| { ORDATA (LPPAGC, lppagc, 12) }, | |
| { ORDATA (LPRDAT, lprdat, 12) }, | |
| { ORDATA (LPCBUF, lpcbuf, 8) }, | |
| { ORDATA (LPCOLC, lpcolc, 8) }, | |
| { ORDATA (LPPDAT, lppdat, 8) }, | |
| { ORDATA (LPCSUM, lpcsum, 8) }, | |
| { ORDATA (DVPTR, dvptr, 7) }, | |
| { ORDATA (DVLNT, dvlnt, 7), REG_RO + REG_NZ }, | |
| { FLDATA (INT, int_req, INT_V_LP20) }, | |
| { FLDATA (IRQ, lp20_irq, 0) }, | |
| { FLDATA (ERR, lpcsa, CSR_V_ERR) }, | |
| { FLDATA (DONE, lpcsa, CSR_V_DONE) }, | |
| { FLDATA (IE, lpcsa, CSR_V_IE) }, | |
| { DRDATA (POS, lp20_unit.pos, T_ADDR_W), PV_LEFT }, | |
| { DRDATA (TIME, lp20_unit.wait, 24), PV_LEFT }, | |
| { FLDATA (STOP_IOE, lp20_stopioe, 0) }, | |
| { BRDATA (TXRAM, txram, 8, 12, TX_SIZE) }, | |
| { BRDATA (DAVFU, davfu, 8, 12, DV_SIZE) }, | |
| { ORDATA (DEVADDR, lp20_dib.ba, 32), REG_HRO }, | |
| { ORDATA (DEVVEC, lp20_dib.vec, 16), REG_HRO }, | |
| { NULL } | |
| }; | |
| MTAB lp20_mod[] = { | |
| { UNIT_DUMMY, 0, NULL, "VFUCLEAR", &lp20_clear_vfu }, | |
| { MTAB_XTD|MTAB_VDV, 004, "ADDRESS", "ADDRESS", | |
| &set_addr, &show_addr, NULL }, | |
| { MTAB_XTD|MTAB_VDV, 0, "VECTOR", "VECTOR", | |
| &set_vec, &show_vec, NULL }, | |
| { 0 } | |
| }; | |
| DEVICE lp20_dev = { | |
| "LP20", &lp20_unit, lp20_reg, lp20_mod, | |
| 1, 10, 31, 1, 8, 8, | |
| NULL, NULL, &lp20_reset, | |
| NULL, &lp20_attach, &lp20_detach, | |
| &lp20_dib, DEV_DISABLE | DEV_UBUS | |
| }; | |
| /* Line printer routines | |
| lp20_rd I/O page read | |
| lp20_wr I/O page write | |
| lp20_svc process event (printer ready) | |
| lp20_reset process reset | |
| lp20_attach process attach | |
| lp20_detach process detach | |
| */ | |
| t_stat lp20_rd (int32 *data, int32 pa, int32 access) | |
| { | |
| update_lpcs (0); /* update csr's */ | |
| switch ((pa >> 1) & 07) { /* case on PA<3:1> */ | |
| case 00: /* LPCSA */ | |
| *data = lpcsa = lpcsa & ~CSA_MBZ; | |
| break; | |
| case 01: /* LPCSB */ | |
| *data = lpcsb = lpcsb & ~CSB_MBZ; | |
| break; | |
| case 02: /* LPBA */ | |
| *data = lpba; | |
| break; | |
| case 03: /* LPBC */ | |
| *data = lpbc = lpbc & BC_MASK; | |
| break; | |
| case 04: /* LPPAGC */ | |
| *data = lppagc = lppagc & PAGC_MASK; | |
| break; | |
| case 05: /* LPRDAT */ | |
| *data = lprdat = lprdat & RDAT_MASK; | |
| break; | |
| case 06: /* LPCOLC/LPCBUF */ | |
| *data = (lpcolc << 8) | lpcbuf; | |
| break; | |
| case 07: /* LPCSUM/LPPDAT */ | |
| *data = (lpcsum << 8) | lppdat; | |
| break; | |
| } /* end case PA */ | |
| return SCPE_OK; | |
| } | |
| t_stat lp20_wr (int32 data, int32 pa, int32 access) | |
| { | |
| update_lpcs (0); /* update csr's */ | |
| switch ((pa >> 1) & 07) { /* case on PA<3:1> */ | |
| case 00: /* LPCSA */ | |
| if (access == WRITEB) data = (pa & 1)? | |
| (lpcsa & 0377) | (data << 8): (lpcsa & ~0377) | data; | |
| if (data & CSA_ECLR) { /* error clear? */ | |
| lpcsa = (lpcsa | CSA_DONE) & ~CSA_GO; /* set done, clr go */ | |
| lpcsb = lpcsb & ~CSB_ECLR; /* clear err */ | |
| sim_cancel (&lp20_unit); /* cancel I/O */ | |
| } | |
| if (data & CSA_INIT) lp20_reset (&lp20_dev); /* init? */ | |
| if (data & CSA_GO) { /* go set? */ | |
| if ((lpcsa & CSA_GO) == 0) { /* not set before? */ | |
| if (lpcsb & CSB_ERR) lpcsb = lpcsb | CSB_GOE; | |
| lpcsum = 0; /* clear checksum */ | |
| sim_activate (&lp20_unit, lp20_unit.wait); | |
| } | |
| } | |
| else sim_cancel (&lp20_unit); /* go clr, stop DMA */ | |
| lpcsa = (lpcsa & ~CSA_RW) | (data & CSA_RW); | |
| break; | |
| case 01: /* LPCSB */ | |
| break; /* ignore writes to TEST */ | |
| case 02: /* LPBA */ | |
| if (access == WRITEB) data = (pa & 1)? | |
| (lpba & 0377) | (data << 8): (lpba & ~0377) | data; | |
| lpba = data; | |
| break; | |
| case 03: /* LPBC */ | |
| if (access == WRITEB) data = (pa & 1)? | |
| (lpbc & 0377) | (data << 8): (lpbc & ~0377) | data; | |
| lpbc = data & BC_MASK; | |
| lpcsa = lpcsa & ~CSA_DONE; | |
| break; | |
| case 04: /* LPPAGC */ | |
| if (access == WRITEB) data = (pa & 1)? | |
| (lppagc & 0377) | (data << 8): (lppagc & ~0377) | data; | |
| lppagc = data & PAGC_MASK; | |
| break; | |
| case 05: /* LPRDAT */ | |
| if (access == WRITEB) data = (pa & 1)? | |
| (lprdat & 0377) | (data << 8): (lprdat & ~0377) | data; | |
| lprdat = data & RDAT_MASK; | |
| txram[lpcbuf & TX_AMASK] = lprdat; /* load RAM */ | |
| break; | |
| case 06: /* LPCOLC/LPCBUF */ | |
| if ((access == WRITEB) && (pa & 1)) /* odd byte */ | |
| lpcolc = data & 0377; | |
| else { | |
| lpcbuf = data & 0377; /* even byte, word */ | |
| if (access == WRITE) lpcolc = (data >> 8) & 0377; | |
| } | |
| break; | |
| case 07: /* LPCSUM/LPPDAT */ | |
| break; /* read only */ | |
| } /* end case PA */ | |
| update_lpcs (0); | |
| return SCPE_OK; | |
| } | |
| /* Line printer service | |
| The translation RAM case table is derived from the LP20 spec and | |
| verified against the LP20 RAM simulator in TOPS10 7.04 LPTSPL. | |
| The equations are: | |
| flags := inter, delim, xlate, paper, delim_hold (from CSRA) | |
| actions : = print_input, print_xlate, davfu_action, interrupt | |
| if (inter) { | |
| if (!xlate || delim || delim_hold) interrupt; | |
| else if (paper) davfu_action; | |
| else print_xlate; | |
| } | |
| else if (paper) { | |
| if (xlate || delim || delim_hold) davfu_action; | |
| else print_input; | |
| } | |
| else { | |
| if (xlate || delim || delim_hold) print_xlate; | |
| else print_input; | |
| } | |
| */ | |
| t_stat lp20_svc (UNIT *uptr) | |
| { | |
| int32 fnc, i, tbc, temp, txst; | |
| int32 dvld = -2; /* must be even */ | |
| uint16 wd10; | |
| t_bool cont; | |
| a10 ba; | |
| static const uint32 txcase[32] = { | |
| TX_CHR, TX_RAM, TX_CHR, TX_DVU, TX_RAM, TX_RAM, TX_DVU, TX_DVU, | |
| TX_RAM, TX_RAM, TX_DVU, TX_DVU, TX_RAM, TX_RAM, TX_DVU, TX_DVU, | |
| TX_INT, TX_INT, TX_INT, TX_INT, TX_RAM, TX_INT, TX_DVU, TX_INT, | |
| TX_INT, TX_INT, TX_INT, TX_INT, TX_INT, TX_INT, TX_INT, TX_INT | |
| }; | |
| lpcsa = lpcsa & ~CSA_GO; | |
| ba = CSA_GETUAE (lpcsa) | lpba; | |
| fnc = CSA_GETFNC (lpcsa); | |
| tbc = 010000 - lpbc; | |
| if (((fnc & FNC_INTERNAL) == 0) && ((lp20_unit.flags & UNIT_ATT) == 0)) { | |
| update_lpcs (CSA_ERR); | |
| return IORETURN (lp20_stopioe, SCPE_UNATT); | |
| } | |
| if ((fnc == FNC_PR) && (dvlnt == 0)) { | |
| update_lpcs (CSA_ERR); | |
| return SCPE_OK; | |
| } | |
| for (i = 0, cont = TRUE; (i < tbc) && cont; ba++, i++) { | |
| if (Map_ReadW (ba, 2, &wd10)) { /* get word, err? */ | |
| lpcsb = lpcsb | CSB_MTE; /* set NXM error */ | |
| update_lpcs (CSA_ERR); /* set done */ | |
| break; | |
| } | |
| lpcbuf = (wd10 >> ((ba & 1)? 8: 0)) & 0377; /* get character */ | |
| lpcsum = (lpcsum + lpcbuf) & 0377; /* add into checksum */ | |
| switch (fnc) { /* switch on function */ | |
| /* Translation RAM load */ | |
| case FNC_RAM: /* RAM load */ | |
| txram[(i >> 1) & TX_AMASK] = wd10 & TX_DMASK; | |
| break; | |
| /* DAVFU RAM load. The DAVFU RAM is actually loaded in bytes, delimited by | |
| a start (354 to 356) and stop (357) byte pair. If the number of bytes | |
| loaded is odd, or no bytes are loaded, the DAVFU is invalid. | |
| */ | |
| case FNC_DVU: /* DVU load */ | |
| if ((lpcbuf >= 0354) && (lpcbuf <= 0356)) /* start DVU load? */ | |
| dvld = dvlnt = 0; /* reset lnt */ | |
| else if (lpcbuf == 0357) { /* stop DVU load? */ | |
| dvptr = 0; /* reset ptr */ | |
| if (dvld & 1) dvlnt = 0; /* if odd, invalid */ | |
| } | |
| else if (dvld == 0) { /* even state? */ | |
| temp = lpcbuf & DV_DMASK; | |
| dvld = 1; | |
| } | |
| else if (dvld == 1) { /* odd state? */ | |
| if (dvlnt < DV_SIZE) davfu[dvlnt++] = | |
| temp | ((lpcbuf & DV_DMASK) << 6); | |
| dvld = 0; | |
| } | |
| break; | |
| /* Print characters */ | |
| case FNC_PR: /* print */ | |
| lprdat = txram[lpcbuf]; /* get RAM char */ | |
| txst = (TX_GETFL (lprdat) << 1) | /* get state */ | |
| ((lpcsa & CSA_DELH)? 1: 0); /* plus delim hold */ | |
| if (lprdat & TX_DELH) lpcsa = lpcsa | CSA_DELH; | |
| else lpcsa = lpcsa & ~CSA_DELH; | |
| lpcsa = lpcsa & ~CSA_UNDF; /* assume char ok */ | |
| switch (txcase[txst]) { /* case on state */ | |
| case TX_CHR: /* take char */ | |
| cont = lp20_print (lpcbuf); | |
| break; | |
| case TX_RAM: /* take translation */ | |
| cont = lp20_print (lprdat); | |
| break; | |
| case TX_DVU: /* DAVFU action */ | |
| if (lprdat & TX_SLEW) | |
| cont = lp20_adv (lprdat & TX_VMASK, TRUE); | |
| else cont = lp20_davfu (lprdat & TX_VMASK); | |
| break; | |
| case TX_INT: /* interrupt */ | |
| lpcsa = lpcsa | CSA_UNDF; /* set flag */ | |
| cont = FALSE; /* force stop */ | |
| break; | |
| } /* end case char state */ | |
| break; | |
| case FNC_TST: /* test */ | |
| break; | |
| } /* end case function */ | |
| } /* end for */ | |
| lpba = ba & 0177777; | |
| lpcsa = (lpcsa & ~CSA_UAE) | ((ba >> (16 - CSA_V_UAE)) & CSA_UAE); | |
| lpbc = (lpbc + i) & BC_MASK; | |
| if (lpbc) update_lpcs (CSA_MBZ); /* intr, but not done */ | |
| else update_lpcs (CSA_DONE); /* intr and done */ | |
| if ((fnc == FNC_PR) && ferror (lp20_unit.fileref)) { | |
| perror ("LP I/O error"); | |
| clearerr (uptr->fileref); | |
| return SCPE_IOERR; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Print routines | |
| lp20_print print a character | |
| lp20_adv advance n lines | |
| lp20_davfu advance to channel on VFU | |
| Return TRUE to continue printing, FALSE to stop | |
| */ | |
| t_bool lp20_print (int32 c) | |
| { | |
| t_bool r = TRUE; | |
| int32 i, rpt = 1; | |
| lppdat = c & 0177; /* mask char to 7b */ | |
| if (lppdat == 000) return TRUE; /* NUL? no op */ | |
| if (lppdat == 012) return lp20_adv (1, TRUE); /* LF? adv carriage */ | |
| if (lppdat == 014) return lp20_davfu (DV_TOF); /* FF? top of form */ | |
| if (lppdat == 015) lpcolc = 0; /* CR? reset col cntr */ | |
| else if (lppdat == 011) { /* TAB? simulate */ | |
| lppdat = ' '; /* with spaces */ | |
| if (lpcolc >= 128) { | |
| r = lp20_adv (1, TRUE); /* eol? adv carriage */ | |
| rpt = 8; /* adv to col 9 */ | |
| } | |
| else rpt = 8 - (lpcolc & 07); /* else adv 1 to 8 */ | |
| } | |
| else { | |
| if (lppdat < 040) lppdat = ' '; /* cvt non-prnt to spc */ | |
| if (lpcolc >= LP_WIDTH) /* line full? */ | |
| r = lp20_adv (1, TRUE); /* adv carriage */ | |
| } | |
| for (i = 0; i < rpt; i++) | |
| fputc (lppdat, lp20_unit.fileref); | |
| lp20_unit.pos = ftell (lp20_unit.fileref); | |
| lpcolc = lpcolc + rpt; | |
| return r; | |
| } | |
| t_bool lp20_adv (int32 cnt, t_bool dvuadv) | |
| { | |
| int32 i; | |
| if (cnt == 0) return TRUE; | |
| lpcolc = 0; /* reset col cntr */ | |
| for (i = 0; i < cnt; i++) | |
| fputc ('\n', lp20_unit.fileref); | |
| lp20_unit.pos = ftell (lp20_unit.fileref); /* print 'n' newlines */ | |
| if (dvuadv) dvptr = (dvptr + cnt) % dvlnt; /* update DAVFU ptr */ | |
| if (davfu[dvptr] & (1 << DV_TOF)) { /* at top of form? */ | |
| if (lppagc = (lppagc - 1) & PAGC_MASK) { /* decr page cntr */ | |
| lpcsa = lpcsa & ~CSA_PZRO; /* update status */ | |
| return TRUE; | |
| } | |
| else { | |
| lpcsa = lpcsa | CSA_PZRO; /* stop if zero */ | |
| return FALSE; | |
| } | |
| } | |
| return TRUE; | |
| } | |
| t_bool lp20_davfu (int32 cnt) | |
| { | |
| int i; | |
| if (cnt > DV_MAX) cnt = 7; /* inval chan? */ | |
| for (i = 0; i < dvlnt; i++) { /* search DAVFU */ | |
| dvptr = dvptr + 1; /* adv DAVFU ptr */ | |
| if (dvptr >= dvlnt) dvptr = 0; /* wrap at end */ | |
| if (davfu[dvptr] & (1 << cnt)) { /* channel stop set? */ | |
| if (cnt) return lp20_adv (i + 1, FALSE); /* ~TOF, adv */ | |
| if (lpcolc) lp20_adv (1, FALSE); /* TOF, need newline? */ | |
| fputc ('\f', lp20_unit.fileref); /* print form feed */ | |
| lp20_unit.pos = ftell (lp20_unit.fileref); | |
| if (lppagc = (lppagc - 1) & PAGC_MASK) { /* decr page cntr */ | |
| lpcsa = lpcsa & ~CSA_PZRO; /* update status */ | |
| return TRUE; | |
| } | |
| else { | |
| lpcsa = lpcsa | CSA_PZRO; /* stop if zero */ | |
| return FALSE; | |
| } | |
| } | |
| } /* end for */ | |
| dvlnt = 0; /* DAVFU error */ | |
| return FALSE; | |
| } | |
| /* Update LPCSA, optionally request interrupt */ | |
| void update_lpcs (int32 flg) | |
| { | |
| if (flg) lp20_irq = 1; /* set int req */ | |
| lpcsa = (lpcsa | flg) & ~(CSA_MBZ | CSA_ERR | CSA_ONL | CSA_DVON); | |
| lpcsb = (lpcsb | CSB_OFFL | CSB_DVOF) & ~CSB_MBZ; | |
| if (lp20_unit.flags & UNIT_ATT) { | |
| lpcsa = lpcsa | CSA_ONL; | |
| lpcsb = lpcsb & ~CSB_OFFL; | |
| } | |
| else lpcsa = lpcsa & ~CSA_DONE; | |
| if (dvlnt) { | |
| lpcsa = lpcsa | CSA_DVON; | |
| lpcsb = lpcsb & ~CSB_DVOF; | |
| } | |
| if (lpcsb & CSB_ERR) lpcsa = lpcsa | CSA_ERR; | |
| if ((lpcsa & CSA_IE) && lp20_irq) int_req = int_req | INT_LP20; | |
| else int_req = int_req & ~INT_LP20; | |
| return; | |
| } | |
| /* Acknowledge interrupt (clear internal request) */ | |
| int32 lp20_inta (void) | |
| { | |
| lp20_irq = 0; /* clear int req */ | |
| return lp20_dib.vec; | |
| } | |
| t_stat lp20_reset (DEVICE *dptr) | |
| { | |
| lpcsa = CSA_DONE; | |
| lpcsb = 0; | |
| lpba = lpbc = lppagc = lpcolc = 0; /* clear registers */ | |
| lprdat = lppdat = lpcbuf = lpcsum = 0; | |
| lp20_irq = 0; /* clear int req */ | |
| dvptr = 0; /* reset davfu ptr */ | |
| sim_cancel (&lp20_unit); /* deactivate unit */ | |
| update_lpcs (0); /* update status */ | |
| return SCPE_OK; | |
| } | |
| t_stat lp20_attach (UNIT *uptr, char *cptr) | |
| { | |
| t_stat reason; | |
| reason = attach_unit (uptr, cptr); /* attach file */ | |
| if (lpcsa & CSA_ONL) return reason; /* just file chg? */ | |
| if (sim_is_active (&lp20_unit)) update_lpcs (0); /* busy? no int */ | |
| else update_lpcs (CSA_MBZ); /* interrupt */ | |
| return reason; | |
| } | |
| t_stat lp20_detach (UNIT *uptr) | |
| { | |
| t_stat reason; | |
| if (!(uptr->flags & UNIT_ATT)) return SCPE_OK; /* attached? */ | |
| reason = detach_unit (uptr); | |
| sim_cancel (&lp20_unit); | |
| lpcsa = lpcsa & ~CSA_GO; | |
| update_lpcs (CSA_MBZ); | |
| return reason; | |
| } | |
| t_stat lp20_clear_vfu (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| int i; | |
| if (!get_yn ("Clear DAVFU? [N]", FALSE)) return SCPE_OK; | |
| for (i = 0; i < DV_SIZE; i++) davfu[i] = 0; | |
| dvlnt = dvptr = 0; | |
| update_lpcs (0); | |
| return SCPE_OK; | |
| } |