| /* id_tt.c: Interdata teletype | |
| Copyright (c) 2000-2008, 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. | |
| tt console | |
| 18-Jun-07 RMS Added UNIT_IDLE flag to console input | |
| 18-Oct-06 RMS Sync keyboard to LFC clock | |
| 30-Sep-06 RMS Fixed handling of non-printable characters in KSR mode | |
| 22-Nov-05 RMS Revised for new terminal processing routines | |
| 29-Dec-03 RMS Added support for console backpressure | |
| 25-Apr-03 RMS Revised for extended file support | |
| 11-Jan-03 RMS Added TTP support | |
| 22-Dec-02 RMS Added break support | |
| */ | |
| #include "id_defs.h" | |
| #include <ctype.h> | |
| /* Device definitions */ | |
| #define TTI 0 | |
| #define TTO 1 | |
| #define STA_OVR 0x80 /* overrun */ | |
| #define STA_BRK 0x20 /* break */ | |
| #define STA_MASK (STA_OVR | STA_BRK | STA_BSY) /* status mask */ | |
| #define SET_EX (STA_OVR | STA_BRK) /* set EX */ | |
| #define CMD_V_FDPX 4 /* full/half duplex */ | |
| #define CMD_V_RD 2 /* read/write */ | |
| extern uint32 int_req[INTSZ], int_enb[INTSZ]; | |
| extern int32 lfc_poll; | |
| uint32 tt_sta = STA_BSY; /* status */ | |
| uint32 tt_fdpx = 1; /* tt mode */ | |
| uint32 tt_rd = 1, tt_chp = 0; /* tt state */ | |
| uint32 tt_arm = 0; /* int arm */ | |
| uint32 tt (uint32 dev, uint32 op, uint32 dat); | |
| t_stat tti_svc (UNIT *uptr); | |
| t_stat tto_svc (UNIT *uptr); | |
| t_stat tt_reset (DEVICE *dptr); | |
| t_stat tt_set_mode (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| t_stat tt_set_break (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| t_stat tt_set_enbdis (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| /* TT data structures | |
| tt_dev TT device descriptor | |
| tt_unit TT unit descriptors | |
| tt_reg TT register list | |
| tt_mod TT modifiers list | |
| */ | |
| DIB tt_dib = { d_TT, -1, v_TT, NULL, &tt, NULL }; | |
| UNIT tt_unit[] = { | |
| { UDATA (&tti_svc, TT_MODE_KSR|UNIT_IDLE, 0), 0 }, | |
| { UDATA (&tto_svc, TT_MODE_KSR, 0), SERIAL_OUT_WAIT } | |
| }; | |
| REG tt_reg[] = { | |
| { HRDATA (STA, tt_sta, 8) }, | |
| { HRDATA (KBUF, tt_unit[TTI].buf, 8) }, | |
| { DRDATA (KPOS, tt_unit[TTI].pos, T_ADDR_W), PV_LEFT }, | |
| { DRDATA (KTIME, tt_unit[TTI].wait, 24), PV_LEFT }, | |
| { HRDATA (TBUF, tt_unit[TTO].buf, 8) }, | |
| { DRDATA (TPOS, tt_unit[TTO].pos, T_ADDR_W), PV_LEFT }, | |
| { DRDATA (TTIME, tt_unit[TTO].wait, 24), REG_NZ + PV_LEFT }, | |
| { FLDATA (IREQ, int_req[l_TT], i_TT) }, | |
| { FLDATA (IENB, int_enb[l_TT], i_TT) }, | |
| { FLDATA (IARM, tt_arm, 0) }, | |
| { FLDATA (RD, tt_rd, 0) }, | |
| { FLDATA (FDPX, tt_fdpx, 0) }, | |
| { FLDATA (CHP, tt_chp, 0) }, | |
| { HRDATA (DEVNO, tt_dib.dno, 8), REG_HRO }, | |
| { NULL } | |
| }; | |
| MTAB tt_mod[] = { | |
| { TT_MODE, TT_MODE_KSR, "KSR", "KSR", &tt_set_mode }, | |
| { TT_MODE, TT_MODE_7B, "7b", "7B", &tt_set_mode }, | |
| { TT_MODE, TT_MODE_8B, "8b", "8B", &tt_set_mode }, | |
| { TT_MODE, TT_MODE_7P, "7p", "7P", &tt_set_mode }, | |
| { MTAB_XTD|MTAB_VDV|MTAB_NMO, 0, NULL, "ENABLED", | |
| &tt_set_enbdis, NULL, NULL }, | |
| { MTAB_XTD|MTAB_VDV|MTAB_NMO, DEV_DIS, NULL, "DISABLED", | |
| &tt_set_enbdis, NULL, NULL }, | |
| { MTAB_XTD|MTAB_VDV|MTAB_NMO, 0, NULL, "BREAK", | |
| &tt_set_break, NULL, NULL }, | |
| { MTAB_XTD|MTAB_VDV, 0, "DEVNO", "DEVNO", | |
| &set_dev, &show_dev, &tt_dib }, | |
| { 0 } | |
| }; | |
| DEVICE tt_dev = { | |
| "TT", tt_unit, tt_reg, tt_mod, | |
| 2, 10, 31, 1, 16, 8, | |
| NULL, NULL, &tt_reset, | |
| NULL, NULL, NULL, | |
| &tt_dib, 0 | |
| }; | |
| /* Terminal: IO routine */ | |
| uint32 tt (uint32 dev, uint32 op, uint32 dat) | |
| { | |
| uint32 old_rd, t; | |
| switch (op) { /* case IO op */ | |
| case IO_ADR: /* select */ | |
| return BY; /* byte only */ | |
| case IO_OC: /* command */ | |
| old_rd = tt_rd; | |
| tt_arm = int_chg (v_TT, dat, tt_arm); /* upd int ctrl */ | |
| tt_fdpx = io_2b (dat, CMD_V_FDPX, tt_fdpx); /* upd full/half */ | |
| tt_rd = io_2b (dat, CMD_V_RD, tt_rd); /* upd rd/write */ | |
| if (tt_rd != old_rd) { /* rw change? */ | |
| if (tt_rd? tt_chp: !sim_is_active (&tt_unit[TTO])) { | |
| tt_sta = 0; /* busy = 0 */ | |
| if (tt_arm) /* req intr */ | |
| SET_INT (v_TT); | |
| } | |
| else { | |
| tt_sta = STA_BSY; /* busy = 1 */ | |
| CLR_INT (v_TT); /* clr int */ | |
| } | |
| } | |
| else tt_sta = tt_sta & ~STA_OVR; /* clr ovflo */ | |
| break; | |
| case IO_RD: /* read */ | |
| tt_chp = 0; /* clear pend */ | |
| if (tt_rd) | |
| tt_sta = (tt_sta | STA_BSY) & ~STA_OVR; | |
| return (tt_unit[TTI].buf & 0xFF); | |
| case IO_WD: /* write */ | |
| tt_unit[TTO].buf = dat & 0xFF; /* save char */ | |
| if (!tt_rd) /* set busy */ | |
| tt_sta = tt_sta | STA_BSY; | |
| sim_activate (&tt_unit[TTO], tt_unit[TTO].wait); | |
| break; | |
| case IO_SS: /* status */ | |
| t = tt_sta & STA_MASK; /* get status */ | |
| if (t & SET_EX) /* test for EX */ | |
| t = t | STA_EX; | |
| return t; | |
| } | |
| return 0; | |
| } | |
| /* Unit service routines */ | |
| t_stat tti_svc (UNIT *uptr) | |
| { | |
| int32 out, temp; | |
| sim_activate (uptr, KBD_WAIT (uptr->wait, lfc_poll)); /* continue poll */ | |
| tt_sta = tt_sta & ~STA_BRK; /* clear break */ | |
| if ((temp = sim_poll_kbd ()) < SCPE_KFLAG) /* no char or error? */ | |
| return temp; | |
| if (tt_rd) { /* read mode? */ | |
| tt_sta = tt_sta & ~STA_BSY; /* clear busy */ | |
| if (tt_arm) /* if armed, intr */ | |
| SET_INT (v_TT); | |
| if (tt_chp) /* got char? overrun */ | |
| tt_sta = tt_sta | STA_OVR; | |
| } | |
| tt_chp = 1; /* char pending */ | |
| out = temp & 0x7F; /* echo is 7B */ | |
| if (temp & SCPE_BREAK) { /* break? */ | |
| tt_sta = tt_sta | STA_BRK; /* set status */ | |
| uptr->buf = 0; /* no character */ | |
| } | |
| else uptr->buf = sim_tt_inpcvt (temp, TT_GET_MODE (uptr->flags) | TTUF_KSR); | |
| uptr->pos = uptr->pos + 1; /* incr count */ | |
| if (!tt_fdpx) { /* half duplex? */ | |
| out = sim_tt_outcvt (out, TT_GET_MODE (uptr->flags) | TTUF_KSR); | |
| if (out >= 0) { /* valid echo? */ | |
| sim_putchar (out); /* write char */ | |
| tt_unit[TTO].pos = tt_unit[TTO].pos + 1; | |
| } | |
| } | |
| return SCPE_OK; | |
| } | |
| t_stat tto_svc (UNIT *uptr) | |
| { | |
| int32 ch; | |
| t_stat r; | |
| ch = sim_tt_outcvt (uptr->buf, TT_GET_MODE (uptr->flags) | TTUF_KSR); | |
| if (ch >= 0) { | |
| if ((r = sim_putchar_s (ch)) != SCPE_OK) { /* output; error? */ | |
| sim_activate (uptr, uptr->wait); /* try again */ | |
| return ((r == SCPE_STALL)? SCPE_OK: r); | |
| } | |
| } | |
| if (!tt_rd) { /* write mode? */ | |
| tt_sta = tt_sta & ~STA_BSY; /* clear busy */ | |
| if (tt_arm) /* if armed, intr */ | |
| SET_INT (v_TT); | |
| } | |
| uptr->pos = uptr->pos + 1; /* incr count */ | |
| return SCPE_OK; | |
| } | |
| /* Reset routine */ | |
| t_stat tt_reset (DEVICE *dptr) | |
| { | |
| if (dptr->flags & DEV_DIS) /* dis? cancel poll */ | |
| sim_cancel (&tt_unit[TTI]); | |
| else sim_activate_abs (&tt_unit[TTI], KBD_WAIT (tt_unit[TTI].wait, lfc_poll)); | |
| sim_cancel (&tt_unit[TTO]); /* cancel output */ | |
| tt_rd = tt_fdpx = 1; /* read, full duplex */ | |
| tt_chp = 0; /* no char */ | |
| tt_sta = STA_BSY; /* buffer empty */ | |
| CLR_INT (v_TT); /* clear int */ | |
| CLR_ENB (v_TT); /* disable int */ | |
| tt_arm = 0; /* disarm int */ | |
| return SCPE_OK; | |
| } | |
| /* Make mode flags uniform */ | |
| t_stat tt_set_mode (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| tt_unit[TTO].flags = (tt_unit[TTO].flags & ~TT_MODE) | val; | |
| if (val == TT_MODE_7P) | |
| val = TT_MODE_7B; | |
| tt_unit[TTI].flags = (tt_unit[TTI].flags & ~TT_MODE) | val; | |
| return SCPE_OK; | |
| } | |
| /* Set input break */ | |
| t_stat tt_set_break (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| if (tt_dev.flags & DEV_DIS) | |
| return SCPE_NOFNC; | |
| tt_sta = tt_sta | STA_BRK; | |
| if (tt_rd) { /* read mode? */ | |
| tt_sta = tt_sta & ~STA_BSY; /* clear busy */ | |
| if (tt_arm) /* if armed, intr */ | |
| SET_INT (v_TT); | |
| } | |
| sim_cancel (&tt_unit[TTI]); /* restart TT poll */ | |
| sim_activate (&tt_unit[TTI], tt_unit[TTI].wait); /* so brk is seen */ | |
| return SCPE_OK; | |
| } | |
| /* Set enabled/disabled */ | |
| t_stat tt_set_enbdis (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| extern DEVICE ttp_dev; | |
| extern t_stat ttp_reset (DEVICE *dptr); | |
| tt_dev.flags = (tt_dev.flags & ~DEV_DIS) | val; | |
| ttp_dev.flags = (ttp_dev.flags & ~DEV_DIS) | (val ^ DEV_DIS); | |
| tt_reset (&tt_dev); | |
| ttp_reset (&ttp_dev); | |
| return SCPE_OK; | |
| } |