/* hp2100_stddev.c: HP2100 standard devices 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 used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from Robert M Supnik. ptr 12597A-002 paper tape reader interface ptp 12597A-005 paper tape punch interface tty 12531C buffered teleprinter interface clk 12539C time base generator 25-Apr-08 JDB Changed TTY output wait from 100 to 200 for MSU BASIC 18-Apr-08 JDB Removed redundant control char handling definitions 14-Apr-08 JDB Changed TTY console poll to 10 msec. real time Synchronized CLK with TTY if set for 10 msec. Added UNIT_IDLE to TTY and CLK 09-Jan-08 JDB Fixed PTR trailing null counter for tape re-read 31-Dec-07 JDB Added IPTICK register to CLK to display CPU instr/tick Corrected and verified ioCRS actions 28-Dec-06 JDB Added ioCRS state to I/O decoders 22-Nov-05 RMS Revised for new terminal processing routines 13-Sep-04 JDB Added paper tape loop mode, DIAG/READER modifiers to PTR Added PV_LEFT to PTR TRLLIM register Modified CLK to permit disable 15-Aug-04 RMS Added tab to control char set (from Dave Bryan) 14-Jul-04 RMS Generalized handling of control char echoing (from Dave Bryan) 26-Apr-04 RMS Fixed SFS x,C and SFC x,C Fixed SR setting in IBL Fixed input behavior during typeout for RTE-IV Suppressed nulls on TTY output for RTE-IV Implemented DMA SRQ (follows FLG) 29-Mar-03 RMS Added support for console backpressure 25-Apr-03 RMS Added extended file support 22-Dec-02 RMS Added break support 01-Nov-02 RMS Revised BOOT command for IBL ROMs Fixed bug in TTY reset, TTY starts in input mode Fixed bug in TTY mode OTA, stores data as well Fixed clock to add calibration, proper start/stop Added UC option to TTY output 30-May-02 RMS Widened POS to 32b 22-Mar-02 RMS Revised for dynamically allocated memory 03-Nov-01 RMS Changed DEVNO to use extended SET/SHOW 29-Nov-01 RMS Added read only unit support 24-Nov-01 RMS Changed TIME to an array 07-Sep-01 RMS Moved function prototypes 21-Nov-00 RMS Fixed flag, buffer power up state Added status input for ptp, tty 15-Oct-00 RMS Added dynamic device number support The reader and punch, like most HP devices, have a command flop. The teleprinter and clock do not. Reader diagnostic mode simulates a tape loop by rewinding the tape image file upon EOF. Normal mode EOF action is to supply TRLLIM nulls and then either return SCPE_IOERR or SCPE_OK without setting the device flag. To support CPU idling, the teleprinter interface (which doubles as the simulator console) polls for input using a calibrated timer with a ten millisecond period. Other polled-keyboard input devices (multiplexers and the BACI card) synchronize with the console poll to ensure maximum available idle time. The console poll is guaranteed to run, as the TTY device cannot be disabled. The clock (time base generator) autocalibrates. If the CLK is set to a ten millisecond period (e.g., as under RTE), it is synchronized to the console poll. Otherwise (e.g., as under DOS or TSB, which use 100 millisecond periods), it runs asynchronously. If the specified clock frequency is below 10Hz, the clock service routine runs at 10Hz and counts down a repeat counter before generating an interrupt. Autocalibration will not work if the clock is running at 1Hz or less. Clock diagnostic mode corresponds to inserting jumper W2 on the 12539C. This turns off autocalibration and divides the longest time intervals down by 10**3. The clk_time values were chosen to allow the diagnostic to pass its clock calibration test. References: - 2748B Tape Reader Operating and Service Manual (02748-90041, Oct-1977) - 12597A 8-Bit Duplex Register Interface Kit Operating and Service Manual (12597-9002, Sep-1974) - 12531C Buffered Teleprinter Interface Kit Operating and Service Manual (12531-90033, Nov-1972) - 12539C Time Base Generator Interface Kit Operating and Service Manual (12539-90008, Jan-1975) */ #include "hp2100_defs.h" #define TTY_OUT_WAIT 200 /* TTY output wait */ #define UNIT_V_DIAG (TTUF_V_UF + 0) /* diag mode */ #define UNIT_V_AUTOLF (TTUF_V_UF + 1) /* auto linefeed */ #define UNIT_DIAG (1 << UNIT_V_DIAG) #define UNIT_AUTOLF (1 << UNIT_V_AUTOLF) #define PTP_LOW 0000040 /* low tape */ #define TM_MODE 0100000 /* mode change */ #define TM_KBD 0040000 /* enable keyboard */ #define TM_PRI 0020000 /* enable printer */ #define TM_PUN 0010000 /* enable punch */ #define TP_BUSY 0100000 /* busy */ #define CLK_V_ERROR 4 /* clock overrun */ #define CLK_ERROR (1 << CLK_V_ERROR) extern uint32 PC, SR; extern uint32 dev_cmd[2], dev_ctl[2], dev_flg[2], dev_fbf[2], dev_srq[2]; int32 ptr_stopioe = 0; /* stop on error */ int32 ptr_trlcnt = 0; /* trailer counter */ int32 ptr_trllim = 40; /* trailer to add */ int32 ptp_stopioe = 0; int32 ttp_stopioe = 0; int32 tty_buf = 0; /* tty buffer */ int32 tty_mode = 0; /* tty mode */ int32 tty_shin = 0377; /* tty shift in */ int32 tty_lf = 0; /* lf flag */ int32 clk_select = 0; /* clock time select */ int32 clk_error = 0; /* clock error */ int32 clk_ctr = 0; /* clock counter */ int32 clk_time[8] = { /* clock intervals */ 155, 1550, 15500, 155000, 155000, 155000, 155000, 155000 }; int32 clk_tps[8] = { /* clock tps */ 10000, 1000, 100, 10, 10, 10, 10, 10 }; int32 clk_rpt[8] = { /* number of repeats */ 1, 1, 1, 1, 10, 100, 1000, 10000 }; uint32 clk_tick = 0; /* instructions per tick */ DEVICE ptr_dev, ptp_dev, tty_dev, clk_dev; int32 ptrio (int32 inst, int32 IR, int32 dat); t_stat ptr_svc (UNIT *uptr); t_stat ptr_attach (UNIT *uptr, char *cptr); t_stat ptr_reset (DEVICE *dptr); t_stat ptr_boot (int32 unitno, DEVICE *dptr); int32 ptpio (int32 inst, int32 IR, int32 dat); t_stat ptp_svc (UNIT *uptr); t_stat ptp_reset (DEVICE *dptr); int32 ttyio (int32 inst, int32 IR, int32 dat); t_stat tti_svc (UNIT *uptr); t_stat tto_svc (UNIT *uptr); t_stat tty_reset (DEVICE *dptr); t_stat tty_set_opt (UNIT *uptr, int32 val, char *cptr, void *desc); t_stat tty_set_alf (UNIT *uptr, int32 val, char *cptr, void *desc); int32 clkio (int32 inst, int32 IR, int32 dat); t_stat clk_svc (UNIT *uptr); t_stat clk_reset (DEVICE *dptr); int32 clk_delay (int32 flg); t_stat tto_out (int32 c); t_stat ttp_out (int32 c); /* PTR data structures ptr_dev PTR device descriptor ptr_unit PTR unit descriptor ptr_mod PTR modifiers ptr_reg PTR register list */ DIB ptr_dib = { PTR, 0, 0, 0, 0, 0, &ptrio }; UNIT ptr_unit = { UDATA (&ptr_svc, UNIT_SEQ+UNIT_ATTABLE+UNIT_ROABLE, 0), SERIAL_IN_WAIT }; REG ptr_reg[] = { { ORDATA (BUF, ptr_unit.buf, 8) }, { FLDATA (CMD, ptr_dib.cmd, 0) }, { FLDATA (CTL, ptr_dib.ctl, 0) }, { FLDATA (FLG, ptr_dib.flg, 0) }, { FLDATA (FBF, ptr_dib.fbf, 0) }, { FLDATA (SRQ, ptr_dib.srq, 0) }, { DRDATA (TRLCTR, ptr_trlcnt, 8), REG_HRO }, { DRDATA (TRLLIM, ptr_trllim, 8), PV_LEFT }, { DRDATA (POS, ptr_unit.pos, T_ADDR_W), PV_LEFT }, { DRDATA (TIME, ptr_unit.wait, 24), PV_LEFT }, { FLDATA (STOP_IOE, ptr_stopioe, 0) }, { ORDATA (DEVNO, ptr_dib.devno, 6), REG_HRO }, { NULL } }; MTAB ptr_mod[] = { { UNIT_DIAG, UNIT_DIAG, "diagnostic mode", "DIAG", NULL }, { UNIT_DIAG, 0, "reader mode", "READER", NULL }, { MTAB_XTD | MTAB_VDV, 0, "DEVNO", "DEVNO", &hp_setdev, &hp_showdev, &ptr_dev }, { 0 } }; DEVICE ptr_dev = { "PTR", &ptr_unit, ptr_reg, ptr_mod, 1, 10, 31, 1, 8, 8, NULL, NULL, &ptr_reset, &ptr_boot, &ptr_attach, NULL, &ptr_dib, DEV_DISABLE }; /* PTP data structures ptp_dev PTP device descriptor ptp_unit PTP unit descriptor ptp_mod PTP modifiers ptp_reg PTP register list */ DIB ptp_dib = { PTP, 0, 0, 0, 0, 0, &ptpio }; UNIT ptp_unit = { UDATA (&ptp_svc, UNIT_SEQ+UNIT_ATTABLE, 0), SERIAL_OUT_WAIT }; REG ptp_reg[] = { { ORDATA (BUF, ptp_unit.buf, 8) }, { FLDATA (CMD, ptp_dib.cmd, 0) }, { FLDATA (CTL, ptp_dib.ctl, 0) }, { FLDATA (FLG, ptp_dib.flg, 0) }, { FLDATA (FBF, ptp_dib.fbf, 0) }, { FLDATA (SRQ, ptp_dib.srq, 0) }, { DRDATA (POS, ptp_unit.pos, T_ADDR_W), PV_LEFT }, { DRDATA (TIME, ptp_unit.wait, 24), PV_LEFT }, { FLDATA (STOP_IOE, ptp_stopioe, 0) }, { ORDATA (DEVNO, ptp_dib.devno, 6), REG_HRO }, { NULL } }; MTAB ptp_mod[] = { { MTAB_XTD | MTAB_VDV, 0, "DEVNO", "DEVNO", &hp_setdev, &hp_showdev, &ptp_dev }, { 0 } }; DEVICE ptp_dev = { "PTP", &ptp_unit, ptp_reg, ptp_mod, 1, 10, 31, 1, 8, 8, NULL, NULL, &ptp_reset, NULL, NULL, NULL, &ptp_dib, DEV_DISABLE }; /* TTY data structures tty_dev TTY device descriptor tty_unit TTY unit descriptor tty_reg TTY register list tty_mod TTy modifiers list */ #define TTI 0 #define TTO 1 #define TTP 2 DIB tty_dib = { TTY, 0, 0, 0, 0, 0, &ttyio }; UNIT tty_unit[] = { { UDATA (&tti_svc, UNIT_IDLE | TT_MODE_UC, 0), POLL_WAIT }, { UDATA (&tto_svc, TT_MODE_UC, 0), TTY_OUT_WAIT }, { UDATA (&tto_svc, UNIT_SEQ | UNIT_ATTABLE | TT_MODE_8B, 0), SERIAL_OUT_WAIT } }; REG tty_reg[] = { { ORDATA (BUF, tty_buf, 8) }, { ORDATA (MODE, tty_mode, 16) }, { ORDATA (SHIN, tty_shin, 8), REG_HRO }, { FLDATA (CMD, tty_dib.cmd, 0), REG_HRO }, { FLDATA (CTL, tty_dib.ctl, 0) }, { FLDATA (FLG, tty_dib.flg, 0) }, { FLDATA (FBF, tty_dib.fbf, 0) }, { FLDATA (SRQ, tty_dib.srq, 0) }, { FLDATA (KLFP, tty_lf, 0), REG_HRO }, { DRDATA (KPOS, tty_unit[TTI].pos, T_ADDR_W), PV_LEFT }, { DRDATA (KTIME, tty_unit[TTI].wait, 24), REG_NZ + PV_LEFT }, { DRDATA (TPOS, tty_unit[TTO].pos, T_ADDR_W), PV_LEFT }, { DRDATA (TTIME, tty_unit[TTO].wait, 24), REG_NZ + PV_LEFT }, { DRDATA (PPOS, tty_unit[TTP].pos, T_ADDR_W), PV_LEFT }, { FLDATA (STOP_IOE, ttp_stopioe, 0) }, { ORDATA (DEVNO, tty_dib.devno, 6), REG_HRO }, { NULL } }; MTAB tty_mod[] = { { TT_MODE, TT_MODE_UC, "UC", "UC", &tty_set_opt }, { TT_MODE, TT_MODE_7B, "7b", "7B", &tty_set_opt }, { TT_MODE, TT_MODE_8B, "8b", "8B", &tty_set_opt }, { TT_MODE, TT_MODE_7P, "7p", "7P", &tty_set_opt }, { UNIT_AUTOLF, UNIT_AUTOLF, "autolf", "AUTOLF", &tty_set_alf }, { UNIT_AUTOLF, 0 , NULL, "NOAUTOLF", &tty_set_alf }, { MTAB_XTD | MTAB_VDV, 0, "DEVNO", "DEVNO", &hp_setdev, &hp_showdev, &tty_dev }, { 0 } }; DEVICE tty_dev = { "TTY", tty_unit, tty_reg, tty_mod, 3, 10, 31, 1, 8, 8, NULL, NULL, &tty_reset, NULL, NULL, NULL, &tty_dib, 0 }; /* CLK data structures clk_dev CLK device descriptor clk_unit CLK unit descriptor clk_mod CLK modifiers clk_reg CLK register list */ DIB clk_dib = { CLK, 0, 0, 0, 0, 0, &clkio }; UNIT clk_unit = { UDATA (&clk_svc, UNIT_IDLE, 0) }; REG clk_reg[] = { { ORDATA (SEL, clk_select, 3) }, { DRDATA (CTR, clk_ctr, 14) }, { FLDATA (CMD, clk_dib.cmd, 0), REG_HRO }, { FLDATA (CTL, clk_dib.ctl, 0) }, { FLDATA (FLG, clk_dib.flg, 0) }, { FLDATA (FBF, clk_dib.fbf, 0) }, { FLDATA (SRQ, clk_dib.srq, 0) }, { FLDATA (ERR, clk_error, CLK_V_ERROR) }, { BRDATA (TIME, clk_time, 10, 24, 8) }, { DRDATA (IPTICK, clk_tick, 24), PV_RSPC | REG_RO }, { ORDATA (DEVNO, clk_dib.devno, 6), REG_HRO }, { NULL } }; MTAB clk_mod[] = { { UNIT_DIAG, UNIT_DIAG, "diagnostic mode", "DIAG", NULL }, { UNIT_DIAG, 0, "calibrated", "CALIBRATED", NULL }, { MTAB_XTD | MTAB_VDV, 0, "DEVNO", "DEVNO", &hp_setdev, &hp_showdev, &clk_dev }, { 0 } }; DEVICE clk_dev = { "CLK", &clk_unit, clk_reg, clk_mod, 1, 0, 0, 0, 0, 0, NULL, NULL, &clk_reset, NULL, NULL, NULL, &clk_dib, DEV_DISABLE }; /* Paper tape reader IO instructions */ int32 ptrio (int32 inst, int32 IR, int32 dat) { int32 dev; dev = IR & I_DEVMASK; /* get device no */ switch (inst) { /* case on opcode */ case ioFLG: /* flag clear/set */ if ((IR & I_HC) == 0) { setFSR (dev); } /* STF */ break; case ioSFC: /* skip flag clear */ if (FLG (dev) == 0) PC = (PC + 1) & VAMASK; break; case ioSFS: /* skip flag set */ if (FLG (dev) != 0) PC = (PC + 1) & VAMASK; break; case ioMIX: /* merge */ dat = dat | ptr_unit.buf; break; case ioLIX: /* load */ dat = ptr_unit.buf; break; case ioCRS: /* control reset */ /* action same as CLC */ case ioCTL: /* control clear/set */ if (IR & I_CTL) { /* CLC */ clrCMD (dev); /* clear cmd, ctl */ clrCTL (dev); } else { /* STC */ setCMD (dev); /* set cmd, ctl */ setCTL (dev); sim_activate (&ptr_unit, ptr_unit.wait); } break; default: break; } if (IR & I_HC) { clrFSR (dev); } /* H/C option */ return dat; } /* Unit service */ t_stat ptr_svc (UNIT *uptr) { int32 dev, temp; dev = ptr_dib.devno; /* get device no */ clrCMD (dev); /* clear cmd */ if ((ptr_unit.flags & UNIT_ATT) == 0) /* attached? */ return IORETURN (ptr_stopioe, SCPE_UNATT); while ((temp = getc (ptr_unit.fileref)) == EOF) { /* read byte, error? */ if (feof (ptr_unit.fileref)) { /* end of file? */ if ((ptr_unit.flags & UNIT_DIAG) && (ptr_unit.pos > 0)) { rewind (ptr_unit.fileref); /* rewind if loop mode */ ptr_unit.pos = 0; } else { if (ptr_trlcnt >= ptr_trllim) { /* added all trailer? */ if (ptr_stopioe) { /* stop on error? */ printf ("PTR end of file\n"); return SCPE_IOERR; } else return SCPE_OK; /* no, just hang */ } ptr_trlcnt++; /* count trailer */ temp = 0; /* read a zero */ break; } } else { /* no, real error */ perror ("PTR I/O error"); clearerr (ptr_unit.fileref); return SCPE_IOERR; } } setFSR (dev); /* set flag */ ptr_unit.buf = temp & 0377; /* put byte in buf */ ptr_unit.pos = ftell (ptr_unit.fileref); if (temp) /* character non-null? */ ptr_trlcnt = 0; /* clear trailing null counter */ return SCPE_OK; } /* Attach routine - clear the trailer counter */ t_stat ptr_attach (UNIT *uptr, char *cptr) { ptr_trlcnt = 0; return attach_unit (uptr, cptr); } /* Reset routine - called from SCP, flags in DIB's */ t_stat ptr_reset (DEVICE *dptr) { ptr_dib.cmd = ptr_dib.ctl = 0; /* clear cmd, ctl */ ptr_dib.flg = ptr_dib.fbf = ptr_dib.srq = 1; /* set flg, fbf, srq */ ptr_unit.buf = 0; sim_cancel (&ptr_unit); /* deactivate unit */ return SCPE_OK; } /* Paper tape reader bootstrap routine (HP 12992K ROM) */ const uint16 ptr_rom[IBL_LNT] = { 0107700, /*ST CLC 0,C ; intr off */ 0002401, /* CLA,RSS ; skip in */ 0063756, /*CN LDA M11 ; feed frame */ 0006700, /* CLB,CCE ; set E to rd byte */ 0017742, /* JSB READ ; get #char */ 0007306, /* CMB,CCE,INB,SZB ; 2's comp */ 0027713, /* JMP *+5 ; non-zero byte */ 0002006, /* INA,SZA ; feed frame ctr */ 0027703, /* JMP *-3 */ 0102077, /* HLT 77B ; stop */ 0027700, /* JMP ST ; next */ 0077754, /* STA WC ; word in rec */ 0017742, /* JSB READ ; get feed frame */ 0017742, /* JSB READ ; get address */ 0074000, /* STB 0 ; init csum */ 0077755, /* STB AD ; save addr */ 0067755, /*CK LDB AD ; check addr */ 0047777, /* ADB MAXAD ; below loader */ 0002040, /* SEZ ; E =0 => OK */ 0027740, /* JMP H55 */ 0017742, /* JSB READ ; get word */ 0040001, /* ADA 1 ; cont checksum */ 0177755, /* STA AD,I ; store word */ 0037755, /* ISZ AD */ 0000040, /* CLE ; force wd read */ 0037754, /* ISZ WC ; block done? */ 0027720, /* JMP CK ; no */ 0017742, /* JSB READ ; get checksum */ 0054000, /* CPB 0 ; ok? */ 0027702, /* JMP CN ; next block */ 0102011, /* HLT 11 ; bad csum */ 0027700, /* JMP ST ; next */ 0102055, /*H55 HALT 55 ; bad address */ 0027700, /* JMP ST ; next */ 0000000, /*RD 0 */ 0006600, /* CLB,CME ; E reg byte ptr */ 0103710, /* STC RDR,C ; start reader */ 0102310, /* SFS RDR ; wait */ 0027745, /* JMP *-1 */ 0106410, /* MIB RDR ; get byte */ 0002041, /* SEZ,RSS ; E set? */ 0127742, /* JMP RD,I ; no, done */ 0005767, /* BLF,CLE,BLF ; shift byte */ 0027744, /* JMP RD+2 ; again */ 0000000, /*WC 000000 ; word count */ 0000000, /*AD 000000 ; address */ 0177765, /*M11 -11 ; feed count */ 0, 0, 0, 0, 0, 0, 0, 0, /* unused */ 0, 0, 0, 0, 0, 0, 0, /* unused */ 0000000 /*MAXAD -ST ; max addr */ }; t_stat ptr_boot (int32 unitno, DEVICE *dptr) { int32 dev; dev = ptr_dib.devno; /* get device no */ if (ibl_copy (ptr_rom, dev)) return SCPE_IERR; /* copy boot to memory */ SR = (SR & IBL_OPT) | IBL_PTR | (dev << IBL_V_DEV); /* set SR */ return SCPE_OK; } /* Paper tape punch IO instructions */ int32 ptpio (int32 inst, int32 IR, int32 dat) { int32 dev; dev = IR & I_DEVMASK; /* get device no */ switch (inst) { /* case on opcode */ case ioFLG: /* flag clear/set */ if ((IR & I_HC) == 0) { setFSR (dev); } /* STF */ break; case ioSFC: /* skip flag clear */ if (FLG (dev) == 0) PC = (PC + 1) & VAMASK; break; case ioSFS: /* skip flag set */ if (FLG (dev) != 0) PC = (PC + 1) & VAMASK; break; case ioLIX: /* load */ dat = 0; case ioMIX: /* merge */ if ((ptp_unit.flags & UNIT_ATT) == 0) dat = dat | PTP_LOW; /* out of tape? */ break; case ioOTX: /* output */ ptp_unit.buf = dat; break; case ioCRS: /* control reset */ /* action same as CLC */ case ioCTL: /* control clear/set */ if (IR & I_CTL) { /* CLC */ clrCMD (dev); /* clear cmd, ctl */ clrCTL (dev); } else { /* STC */ setCMD (dev); /* set cmd, ctl */ setCTL (dev); sim_activate (&ptp_unit, ptp_unit.wait); } break; default: break; } if (IR & I_HC) { clrFSR (dev); } /* H/C option */ return dat; } /* Unit service */ t_stat ptp_svc (UNIT *uptr) { int32 dev; dev = ptp_dib.devno; /* get device no */ clrCMD (dev); /* clear cmd */ setFSR (dev); /* set flag */ if ((ptp_unit.flags & UNIT_ATT) == 0) /* attached? */ return IORETURN (ptp_stopioe, SCPE_UNATT); if (putc (ptp_unit.buf, ptp_unit.fileref) == EOF) { /* output byte */ perror ("PTP I/O error"); clearerr (ptp_unit.fileref); return SCPE_IOERR; } ptp_unit.pos = ftell (ptp_unit.fileref); /* update position */ return SCPE_OK; } /* Reset routine */ t_stat ptp_reset (DEVICE *dptr) { ptp_dib.cmd = ptp_dib.ctl = 0; /* clear cmd, ctl */ ptp_dib.flg = ptp_dib.fbf = ptp_dib.srq = 1; /* set flg, fbf, srq */ ptp_unit.buf = 0; sim_cancel (&ptp_unit); /* deactivate unit */ return SCPE_OK; } /* Terminal IO instructions */ int32 ttyio (int32 inst, int32 IR, int32 dat) { int32 dev; dev = IR & I_DEVMASK; /* get device no */ switch (inst) { /* case on opcode */ case ioFLG: /* flag clear/set */ if ((IR & I_HC) == 0) { setFSR (dev); } /* STF */ break; case ioSFC: /* skip flag clear */ if (FLG (dev) == 0) PC = (PC + 1) & VAMASK; break; case ioSFS: /* skip flag set */ if (FLG (dev) != 0) PC = (PC + 1) & VAMASK; break; case ioLIX: /* load */ dat = 0; case ioMIX: /* merge */ dat = dat | tty_buf; if (!(tty_mode & TM_KBD) && sim_is_active (&tty_unit[TTO])) dat = dat | TP_BUSY; break; case ioOTX: /* output */ if (dat & TM_MODE) tty_mode = dat & (TM_KBD|TM_PRI|TM_PUN); tty_buf = dat & 0377; break; case ioCRS: /* control reset */ clrCTL (dev); /* clear control */ setFSR (dev); /* set flag */ tty_mode = TM_KBD; /* set tty, clear print/punch */ tty_buf = 0; /* clear buffer */ tty_shin = 0377; /* input inactive */ tty_lf = 0; /* no lf pending */ break; case ioCTL: /* control clear/set */ if (IR & I_CTL) { clrCTL (dev); } /* CLC */ else { /* STC */ setCTL (dev); if (!(tty_mode & TM_KBD)) /* output? */ sim_activate (&tty_unit[TTO], tty_unit[TTO].wait); } break; default: break; } if (IR & I_HC) { clrFSR (dev); } /* H/C option */ return dat; } /* TTY input service routine. The console input poll routine is scheduled with a ten millisecond period using a calibrated timer, which is the source of event timing for all of the keyboard polling routines. Synchronizing other keyboard polls with the console poll ensures maximum idle time. Several HP operating systems require a CR and LF sequence for line termination. This is awkward on a PC, as there is no LF key (CTRL+J is needed instead). We provide an AUTOLF mode to add a LF automatically to each CR input. When this mode is set, entering CR will set a flag, which will cause a LF to be supplied automatically at the next input poll. The 12531C teleprinter interface and the later 12880A CRT interface provide a clever mechanism to detect a keypress during output. This is used by DOS and RTE to allow the user to interrupt lengthy output operations to enter system commands. Referring to the 12531C schematic, the terminal input enters on pin X ("DATA FROM EIA COMPATIBLE DEVICE"). The signal passes through four transistor inversions (Q8, Q1, Q2, and Q3) to appear on pin 12 of NAND gate U104C. If the flag flip-flop is not set, the terminal input passes to the (inverted) output of U104C and thence to the D input of the first of the flip-flops forming the data register. In the idle condition (no key pressed), the terminal input line is marking (voltage negative), so in passing through a total of five inversions, a logic one is presented at the serial input of the data register. During an output operation, the register is parallel loaded and serially shifted, sending the output data through the register to the device and -- this is the crux -- filling the register with logic ones from U104C. At the end of the output operation, the card flag is set, an interrupt occurs, and the RTE driver is entered. The driver then does an LIA SC to read the contents of the data register. If no key has been pressed during the output operation, the register will read as all ones (octal 377). If, however, any key was struck, at least one zero bit will be present. If the register value doesn't equal 377, the driver sets the system "operator attention" flag, which will cause DOS or RTE to output an asterisk prompt and initiate a terminal read when the current output line is completed. */ t_stat tti_svc (UNIT *uptr) { int32 c, dev; uptr->wait = sim_rtcn_calb (POLL_RATE, TMR_POLL); /* calibrate poll timer */ sim_activate (uptr, uptr->wait); /* continue poll */ dev = tty_dib.devno; /* get device no */ tty_shin = 0377; /* assume inactive */ if (tty_lf) { /* auto lf pending? */ c = 012; /* force lf */ tty_lf = 0; } else { if ((c = sim_poll_kbd ()) < SCPE_KFLAG) return c; /* no char or error? */ if (c & SCPE_BREAK) c = 0; /* break? */ else c = sim_tt_inpcvt (c, TT_GET_MODE (uptr->flags)); tty_lf = ((c & 0177) == 015) && (uptr->flags & UNIT_AUTOLF); } if (tty_mode & TM_KBD) { /* keyboard enabled? */ tty_buf = c; /* put char in buf */ uptr->pos = uptr->pos + 1; setFSR (dev); /* set flag */ if (c) { tto_out (c); /* echo? */ return ttp_out (c); /* punch? */ } } else tty_shin = c; /* no, char shifts in */ return SCPE_OK; } /* TTY output service routine */ t_stat tto_svc (UNIT *uptr) { int32 c, dev; t_stat r; c = tty_buf; /* get char */ tty_buf = tty_shin; /* shift in */ tty_shin = 0377; /* line inactive */ if ((r = tto_out (c)) != SCPE_OK) { /* output; error? */ sim_activate (uptr, uptr->wait); /* retry */ return ((r == SCPE_STALL)? SCPE_OK: r); /* !stall? report */ } dev = tty_dib.devno; /* get device no */ setFSR (dev); /* set done flag */ return ttp_out (c); /* punch if enabled */ } t_stat tto_out (int32 c) { t_stat r; if (tty_mode & TM_PRI) { /* printing? */ c = sim_tt_outcvt (c, TT_GET_MODE (tty_unit[TTO].flags)); if (c >= 0) { /* valid? */ if (r = sim_putchar_s (c)) return r; /* output char */ tty_unit[TTO].pos = tty_unit[TTO].pos + 1; } } return SCPE_OK; } t_stat ttp_out (int32 c) { if (tty_mode & TM_PUN) { /* punching? */ if ((tty_unit[TTP].flags & UNIT_ATT) == 0) /* attached? */ return IORETURN (ttp_stopioe, SCPE_UNATT); if (putc (c, tty_unit[TTP].fileref) == EOF) { /* output char */ perror ("TTP I/O error"); clearerr (tty_unit[TTP].fileref); return SCPE_IOERR; } tty_unit[TTP].pos = ftell (tty_unit[TTP].fileref); } return SCPE_OK; } /* TTY reset routine */ t_stat tty_reset (DEVICE *dptr) { tty_dib.cmd = tty_dib.ctl = 0; /* clear cmd, ctl */ tty_dib.flg = tty_dib.fbf = tty_dib.srq = 1; /* set flg, fbf, srq */ tty_mode = TM_KBD; /* enable input */ tty_buf = 0; tty_shin = 0377; /* input inactive */ tty_lf = 0; /* no lf pending */ tty_unit[TTI].wait = POLL_WAIT; /* reset initial poll */ sim_rtcn_init (tty_unit[TTI].wait, TMR_POLL); /* init poll timer */ sim_activate (&tty_unit[TTI], tty_unit[TTI].wait); /* activate poll */ sim_cancel (&tty_unit[TTO]); /* cancel output */ return SCPE_OK; } t_stat tty_set_opt (UNIT *uptr, int32 val, char *cptr, void *desc) { int32 u = uptr - tty_dev.units; if (u > TTO) return SCPE_NOFNC; if ((u == TTI) && (val == TT_MODE_7P)) val = TT_MODE_7B; tty_unit[u].flags = (tty_unit[u].flags & ~TT_MODE) | val; return SCPE_OK; } t_stat tty_set_alf (UNIT *uptr, int32 val, char *cptr, void *desc) { int32 u = uptr - tty_dev.units; if (u != TTI) return SCPE_NOFNC; return SCPE_OK; } /* Synchronize polling. Return an event time corresponding either with the amount of time remaining in the current poll (mode = INITIAL) or the amount of time in a full poll period (mode = SERVICE). If the former call is made when the device service routine is started, then making the latter call during unit service will ensure that the polls remain synchronized. */ int32 sync_poll (POLLMODE poll_mode) { int32 poll_time; if (poll_mode == INITIAL) { poll_time = sim_is_active (&tty_unit[TTI]); if (poll_time) return poll_time; else return POLL_WAIT; } else return tty_unit[TTI].wait; } /* Clock I/O instructions. The time base generator (CLK) provides periodic interrupts from 100 microseconds to 1000 seconds. The CLK uses a calibrated timer to provide the time base. For periods ranging from 1 to 1000 seconds, a 100 millisecond timer is used, and 10 to 10000 ticks are counted before setting the device flag to indicate that the period has expired. If the period is set to ten milliseconds, the console poll timer is used instead of an independent timer. This is to maximize the idle period. In diagnostic mode, the clock period is set to the expected number of CPU instructions, rather than wall-clock time, so that the diagnostic executes as expected. */ int32 clkio (int32 inst, int32 IR, int32 dat) { int32 dev; dev = IR & I_DEVMASK; /* get device no */ switch (inst) { /* case on opcode */ case ioFLG: /* flag clear/set */ if ((IR & I_HC) == 0) { setFSR (dev); } /* STF */ break; case ioSFC: /* skip flag clear */ if (FLG (dev) == 0) PC = (PC + 1) & VAMASK; break; case ioSFS: /* skip flag set */ if (FLG (dev) != 0) PC = (PC + 1) & VAMASK; break; case ioMIX: /* merge */ dat = dat | clk_error; break; case ioLIX: /* load */ dat = clk_error; break; case ioOTX: /* output */ clk_select = dat & 07; /* save select */ sim_cancel (&clk_unit); /* stop the clock */ clrCTL (dev); /* clear control */ break; case ioCRS: /* control reset */ /* action same as CLC */ case ioCTL: /* control clear/set */ if (IR & I_CTL) { /* CLC */ clrCTL (dev); /* turn off clock */ sim_cancel (&clk_unit); /* deactivate unit */ } else { /* STC */ setCTL (dev); /* set CTL */ if (clk_unit.flags & UNIT_DIAG) /* diag mode? */ clk_unit.flags = clk_unit.flags & ~UNIT_IDLE; /* not calibrated */ else clk_unit.flags = clk_unit.flags | UNIT_IDLE; /* is calibrated */ if (!sim_is_active (&clk_unit)) { /* clock running? */ clk_tick = clk_delay (0); /* get tick count */ if ((clk_unit.flags & UNIT_DIAG) == 0) /* calibrated? */ if (clk_select == 2) /* 10 msec. interval? */ clk_tick = sync_poll (INITIAL); /* sync poll */ else sim_rtcn_init (clk_tick, TMR_CLK); /* initialize timer */ sim_activate (&clk_unit, clk_tick); /* start clock */ clk_ctr = clk_delay (1); /* set repeat ctr */ } clk_error = 0; /* clear error */ } break; default: break; } if (IR & I_HC) { clrFSR (dev); } /* H/C option */ return dat; } /* CLK unit service. As with the I/O handler, if the time base period is set to ten milliseconds, the console poll timer is used instead of an independent timer. */ t_stat clk_svc (UNIT *uptr) { int32 dev; dev = clk_dib.devno; /* get device no */ if (!CTL (dev)) return SCPE_OK; /* CTL off? done */ if (clk_unit.flags & UNIT_DIAG) /* diag mode? */ clk_tick = clk_delay (0); /* get fixed delay */ else if (clk_select == 2) /* 10 msec period? */ clk_tick = sync_poll (SERVICE); /* sync poll */ else clk_tick = sim_rtcn_calb (clk_tps[clk_select], TMR_CLK); /* calibrate delay */ sim_activate (uptr, clk_tick); /* reactivate */ clk_ctr = clk_ctr - 1; /* decrement counter */ if (clk_ctr <= 0) { /* end of interval? */ if (FLG (dev)) clk_error = CLK_ERROR; /* overrun? error */ else { setFSR (dev); } /* else set flag */ clk_ctr = clk_delay (1); /* reset counter */ } return SCPE_OK; } /* Reset routine */ t_stat clk_reset (DEVICE *dptr) { clk_dib.cmd = clk_dib.ctl = 0; /* clear cmd, ctl */ clk_dib.flg = clk_dib.fbf = clk_dib.srq = 1; /* set flg, fbf, srq */ clk_error = 0; /* clear error */ clk_select = 0; /* clear select */ clk_ctr = 0; /* clear counter */ sim_cancel (&clk_unit); /* deactivate unit */ return SCPE_OK; } /* Clock delay routine */ int32 clk_delay (int32 flg) { int32 sel = clk_select; if ((clk_unit.flags & UNIT_DIAG) && (sel >= 4)) sel = sel - 3; if (flg) return clk_rpt[sel]; else return clk_time[sel]; }