| /* pdp8_tt.c: PDP-8 console terminal simulator | |
| Copyright (c) 1993-2016, 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. | |
| tti,tto KL8E terminal input/output | |
| 18-Apr-12 RMS Revised to use clock coscheduling | |
| 18-Jun-07 RMS Added UNIT_IDLE flag to console input | |
| 18-Oct-06 RMS Synced keyboard to clock | |
| 30-Sep-06 RMS Fixed handling of non-printable characters in KSR mode | |
| 22-Nov-05 RMS Revised for new terminal processing routines | |
| 28-May-04 RMS Removed SET TTI CTRL-C | |
| 29-Dec-03 RMS Added console output backpressure support | |
| 25-Apr-03 RMS Revised for extended file support | |
| 02-Mar-02 RMS Added SET TTI CTRL-C | |
| 22-Dec-02 RMS Added break support | |
| 01-Nov-02 RMS Added 7B/8B support | |
| 04-Oct-02 RMS Added DIBs, device number support | |
| 30-May-02 RMS Widened POS to 32b | |
| 07-Sep-01 RMS Moved function prototypes | |
| */ | |
| #include "pdp8_defs.h" | |
| #include "sim_tmxr.h" | |
| #include <ctype.h> | |
| extern int32 int_req, int_enable, dev_done, stop_inst; | |
| extern int32 tmxr_poll; | |
| int32 tti (int32 IR, int32 AC); | |
| int32 tto (int32 IR, int32 AC); | |
| t_stat tti_svc (UNIT *uptr); | |
| t_stat tto_svc (UNIT *uptr); | |
| t_stat tti_reset (DEVICE *dptr); | |
| t_stat tto_reset (DEVICE *dptr); | |
| t_stat tty_set_mode (UNIT *uptr, int32 val, CONST char *cptr, void *desc); | |
| /* TTI data structures | |
| tti_dev TTI device descriptor | |
| tti_unit TTI unit descriptor | |
| tti_reg TTI register list | |
| tti_mod TTI modifiers list | |
| */ | |
| DIB tti_dib = { DEV_TTI, 1, { &tti } }; | |
| UNIT tti_unit = { UDATA (&tti_svc, UNIT_IDLE|TT_MODE_KSR, 0), SERIAL_IN_WAIT }; | |
| REG tti_reg[] = { | |
| { ORDATAD (BUF, tti_unit.buf, 8, "last data item processed") }, | |
| { FLDATAD (DONE, dev_done, INT_V_TTI, "device done flag") }, | |
| { FLDATAD (ENABLE, int_enable, INT_V_TTI, "interrupt enable flag") }, | |
| { FLDATAD (INT, int_req, INT_V_TTI, "interrupt pending flag") }, | |
| { DRDATAD (POS, tti_unit.pos, T_ADDR_W, "number of characters input"), PV_LEFT }, | |
| { DRDATAD (TIME, tti_unit.wait, 24, "input polling interval (if 0, the keyboard is polled synchronously with the clock)"), PV_LEFT+REG_NZ }, | |
| { NULL } | |
| }; | |
| MTAB tti_mod[] = { | |
| { TT_MODE, TT_MODE_KSR, "KSR", "KSR", &tty_set_mode }, | |
| { TT_MODE, TT_MODE_7B, "7b", "7B", &tty_set_mode }, | |
| { TT_MODE, TT_MODE_8B, "8b", "8B", &tty_set_mode }, | |
| { TT_MODE, TT_MODE_7P, "7b", NULL, NULL }, | |
| { MTAB_XTD|MTAB_VDV, 0, "DEVNO", NULL, NULL, &show_dev, NULL }, | |
| { 0 } | |
| }; | |
| DEVICE tti_dev = { | |
| "TTI", &tti_unit, tti_reg, tti_mod, | |
| 1, 10, 31, 1, 8, 8, | |
| NULL, NULL, &tti_reset, | |
| NULL, NULL, NULL, | |
| &tti_dib, 0 | |
| }; | |
| uint32 tti_buftime; /* time input character arrived */ | |
| /* TTO data structures | |
| tto_dev TTO device descriptor | |
| tto_unit TTO unit descriptor | |
| tto_reg TTO register list | |
| */ | |
| DIB tto_dib = { DEV_TTO, 1, { &tto } }; | |
| UNIT tto_unit = { UDATA (&tto_svc, TT_MODE_KSR, 0), SERIAL_OUT_WAIT }; | |
| REG tto_reg[] = { | |
| { ORDATAD (BUF, tto_unit.buf, 8, "last date item processed") }, | |
| { FLDATAD (DONE, dev_done, INT_V_TTO, "device done flag") }, | |
| { FLDATAD (ENABLE, int_enable, INT_V_TTO, "interrupt enable flag") }, | |
| { FLDATAD (INT, int_req, INT_V_TTO, "interrupt pending flag") }, | |
| { DRDATAD (POS, tto_unit.pos, T_ADDR_W, "number of characters output"), PV_LEFT }, | |
| { DRDATAD (TIME, tto_unit.wait, 24, "time form I/O initiation to interrupt"), PV_LEFT }, | |
| { NULL } | |
| }; | |
| MTAB tto_mod[] = { | |
| { TT_MODE, TT_MODE_KSR, "KSR", "KSR", &tty_set_mode }, | |
| { TT_MODE, TT_MODE_7B, "7b", "7B", &tty_set_mode }, | |
| { TT_MODE, TT_MODE_8B, "8b", "8B", &tty_set_mode }, | |
| { TT_MODE, TT_MODE_7P, "7p", "7P", &tty_set_mode }, | |
| { MTAB_XTD|MTAB_VDV, 0, "DEVNO", NULL, NULL, &show_dev }, | |
| { 0 } | |
| }; | |
| DEVICE tto_dev = { | |
| "TTO", &tto_unit, tto_reg, tto_mod, | |
| 1, 10, 31, 1, 8, 8, | |
| NULL, NULL, &tto_reset, | |
| NULL, NULL, NULL, | |
| &tto_dib, 0 | |
| }; | |
| /* Terminal input: IOT routine */ | |
| int32 tti (int32 IR, int32 AC) | |
| { | |
| switch (IR & 07) { /* decode IR<9:11> */ | |
| case 0: /* KCF */ | |
| dev_done = dev_done & ~INT_TTI; /* clear flag */ | |
| int_req = int_req & ~INT_TTI; | |
| return AC; | |
| case 1: /* KSF */ | |
| return (dev_done & INT_TTI)? IOT_SKP + AC: AC; | |
| case 2: /* KCC */ | |
| dev_done = dev_done & ~INT_TTI; /* clear flag */ | |
| int_req = int_req & ~INT_TTI; | |
| return 0; /* clear AC */ | |
| case 4: /* KRS */ | |
| return (AC | tti_unit.buf); /* return buffer */ | |
| case 5: /* KIE */ | |
| if (AC & 1) | |
| int_enable = int_enable | (INT_TTI+INT_TTO); | |
| else int_enable = int_enable & ~(INT_TTI+INT_TTO); | |
| int_req = INT_UPDATE; /* update interrupts */ | |
| return AC; | |
| case 6: /* KRB */ | |
| dev_done = dev_done & ~INT_TTI; /* clear flag */ | |
| int_req = int_req & ~INT_TTI; | |
| sim_activate_abs (&tti_unit, tti_unit.wait); /* check soon for more input */ | |
| return (tti_unit.buf); /* return buffer */ | |
| default: | |
| return (stop_inst << IOT_V_REASON) + AC; | |
| } /* end switch */ | |
| } | |
| /* Unit service */ | |
| t_stat tti_svc (UNIT *uptr) | |
| { | |
| int32 c; | |
| sim_clock_coschedule (uptr, tmxr_poll); /* continue poll */ | |
| if ((dev_done & INT_TTI) && /* prior character still pending and < 500ms? */ | |
| ((sim_os_msec () - tti_buftime) < 500)) | |
| return SCPE_OK; | |
| if ((c = sim_poll_kbd ()) < SCPE_KFLAG) /* no char or error? */ | |
| return c; | |
| if (c & SCPE_BREAK) /* break? */ | |
| uptr->buf = 0; | |
| else uptr->buf = sim_tt_inpcvt (c, TT_GET_MODE (uptr->flags) | TTUF_KSR); | |
| tti_buftime = sim_os_msec (); | |
| uptr->pos = uptr->pos + 1; | |
| dev_done = dev_done | INT_TTI; /* set done */ | |
| int_req = INT_UPDATE; /* update interrupts */ | |
| return SCPE_OK; | |
| } | |
| /* Reset routine */ | |
| t_stat tti_reset (DEVICE *dptr) | |
| { | |
| tmxr_set_console_units (&tti_unit, &tto_unit); | |
| tti_unit.buf = 0; | |
| dev_done = dev_done & ~INT_TTI; /* clear done, int */ | |
| int_req = int_req & ~INT_TTI; | |
| int_enable = int_enable | INT_TTI; /* set enable */ | |
| if (!sim_is_running) /* RESET (not CAF)? */ | |
| sim_activate (&tti_unit, tmxr_poll); | |
| return SCPE_OK; | |
| } | |
| /* Terminal output: IOT routine */ | |
| int32 tto (int32 IR, int32 AC) | |
| { | |
| switch (IR & 07) { /* decode IR<9:11> */ | |
| case 0: /* TLF */ | |
| dev_done = dev_done | INT_TTO; /* set flag */ | |
| int_req = INT_UPDATE; /* update interrupts */ | |
| return AC; | |
| case 1: /* TSF */ | |
| return (dev_done & INT_TTO)? IOT_SKP + AC: AC; | |
| case 2: /* TCF */ | |
| dev_done = dev_done & ~INT_TTO; /* clear flag */ | |
| int_req = int_req & ~INT_TTO; /* clear int req */ | |
| return AC; | |
| case 5: /* SPI */ | |
| return (int_req & (INT_TTI+INT_TTO))? IOT_SKP + AC: AC; | |
| case 6: /* TLS */ | |
| dev_done = dev_done & ~INT_TTO; /* clear flag */ | |
| int_req = int_req & ~INT_TTO; /* clear int req */ | |
| case 4: /* TPC */ | |
| sim_activate (&tto_unit, tto_unit.wait); /* activate unit */ | |
| tto_unit.buf = AC; /* load buffer */ | |
| return AC; | |
| default: | |
| return (stop_inst << IOT_V_REASON) + AC; | |
| } /* end switch */ | |
| } | |
| /* Unit service */ | |
| t_stat tto_svc (UNIT *uptr) | |
| { | |
| int32 c; | |
| t_stat r; | |
| c = sim_tt_outcvt (uptr->buf, TT_GET_MODE (uptr->flags) | TTUF_KSR); | |
| if (c >= 0) { | |
| if ((r = sim_putchar_s (c)) != SCPE_OK) { /* output char; error? */ | |
| sim_activate (uptr, uptr->wait); /* try again */ | |
| return ((r == SCPE_STALL)? SCPE_OK: r); /* if !stall, report */ | |
| } | |
| } | |
| dev_done = dev_done | INT_TTO; /* set done */ | |
| int_req = INT_UPDATE; /* update interrupts */ | |
| uptr->pos = uptr->pos + 1; | |
| return SCPE_OK; | |
| } | |
| /* Reset routine */ | |
| t_stat tto_reset (DEVICE *dptr) | |
| { | |
| tto_unit.buf = 0; | |
| dev_done = dev_done & ~INT_TTO; /* clear done, int */ | |
| int_req = int_req & ~INT_TTO; | |
| int_enable = int_enable | INT_TTO; /* set enable */ | |
| sim_cancel (&tto_unit); /* deactivate unit */ | |
| return SCPE_OK; | |
| } | |
| t_stat tty_set_mode (UNIT *uptr, int32 val, CONST char *cptr, void *desc) | |
| { | |
| tti_unit.flags = (tti_unit.flags & ~TT_MODE) | val; | |
| tto_unit.flags = (tto_unit.flags & ~TT_MODE) | val; | |
| return SCPE_OK; | |
| } |