| /* sigma_tt.c: Sigma 7012 console teletype | |
| Copyright (c) 2007-2008, 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 7012 console | |
| The 7012 has the following special cases on input and output: | |
| CR input, mapped to NEWLINE and echoes CR-LF | |
| ^H input, mapped to EOM and not echoed | |
| HT input or output, simulates tabbing with fixed 8 character stops | |
| */ | |
| #include "sigma_io_defs.h" | |
| #include <ctype.h> | |
| /* Device definitions */ | |
| #define TTI 0 | |
| #define TTO 1 | |
| /* Device states */ | |
| #define TTS_IDLE 0x0 | |
| #define TTS_INIT 0x1 | |
| #define TTS_END 0x2 | |
| #define TTS_WRITE 0x5 | |
| #define TTS_READ 0x6 | |
| #define TTS_READS 0x86 | |
| /* EBCDIC special characters for input */ | |
| #define E_EOM 0x08 /* end of medium */ | |
| #define E_HT 0x05 /* tab */ | |
| #define E_NL 0x15 /* new line */ | |
| uint32 tt_cmd = TTS_IDLE; | |
| uint32 tti_tps = RTC_HZ_100; | |
| uint32 tti_panel = 020; /* panel int char */ | |
| uint32 tto_pos = 0; /* char position */ | |
| extern uint32 chan_ctl_time; | |
| extern uint8 ascii_to_ebcdic[128]; | |
| extern uint8 ebcdic_to_ascii[256]; | |
| uint32 tt_disp (uint32 op, uint32 dva, uint32 *dvst); | |
| uint32 tt_tio_status (void); | |
| t_stat tt_chan_err (uint32 st); | |
| t_stat tti_rtc_svc (uint32 tm); | |
| 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, CONST char *cptr, void *desc); | |
| void tto_echo (int32 c); | |
| extern t_stat io_set_pint (void); | |
| /* TT data structures | |
| tt_dev TT device descriptor | |
| tt_unit TT unit descriptors | |
| tt_reg TT register list | |
| tt_mod TT modifiers list | |
| */ | |
| dib_t tt_dib = { DVA_TT, tt_disp }; | |
| UNIT tt_unit[] = { | |
| { UDATA (&tti_svc, TT_MODE_UC, 0), 0 }, | |
| { UDATA (&tto_svc, TT_MODE_UC, 0), SERIAL_OUT_WAIT } | |
| }; | |
| REG tt_reg[] = { | |
| { HRDATA (CMD, tt_cmd, 9) }, | |
| { DRDATA (KPOS, tt_unit[TTI].pos, T_ADDR_W), PV_LEFT }, | |
| { DRDATA (KTPS, tti_tps, 8), REG_HRO }, | |
| { DRDATA (TPOS, tt_unit[TTO].pos, T_ADDR_W), PV_LEFT }, | |
| { DRDATA (TTIME, tt_unit[TTO].wait, 24), REG_NZ + PV_LEFT }, | |
| { HRDATA (PANEL, tti_panel, 8) }, | |
| { HRDATA (DEVNO, tt_dib.dva, 12), REG_HRO }, | |
| { NULL } | |
| }; | |
| MTAB tt_mod[] = { | |
| { TT_MODE, TT_MODE_UC, "UC", "UC", &tt_set_mode }, | |
| { TT_MODE, TT_MODE_7P, "7p", "7P", &tt_set_mode }, | |
| { MTAB_XTD|MTAB_VDV|MTAB_NMO, RTC_TTI, "POLL", "POLL", | |
| &rtc_set_tps, &rtc_show_tps, (void *) &tti_tps }, | |
| { MTAB_XTD|MTAB_VDV, 0, "CHAN", "CHAN", | |
| &io_set_dvc, &io_show_dvc, NULL }, | |
| { MTAB_XTD|MTAB_VDV, 0, "DVA", "DVA", | |
| &io_set_dva, &io_show_dva, NULL }, | |
| { MTAB_XTD|MTAB_VDV|MTAB_NMO, 0, "CSTATE", NULL, | |
| NULL, &io_show_cst, NULL }, | |
| { 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 dispatch routine */ | |
| uint32 tt_disp (uint32 op, uint32 dva, uint32 *dvst) | |
| { | |
| switch (op) { /* case on op */ | |
| case OP_SIO: /* start I/O */ | |
| *dvst = tt_tio_status (); /* get status */ | |
| if ((*dvst & DVS_DST) == 0) { /* idle? */ | |
| tt_cmd = TTS_INIT; /* start dev thread */ | |
| sim_activate (&tt_unit[TTO], chan_ctl_time); | |
| } | |
| break; | |
| case OP_TIO: /* test status */ | |
| *dvst = tt_tio_status (); /* return status */ | |
| break; | |
| case OP_HIO: /* halt I/O */ | |
| chan_clr_chi (tt_dib.dva); /* clr int*/ | |
| *dvst = tt_tio_status (); /* get status */ | |
| if ((*dvst & DVS_DST) != 0) { /* busy? */ | |
| sim_cancel (&tt_unit[TTO]); /* stop dev thread */ | |
| tt_cmd = TTS_IDLE; | |
| chan_uen (tt_dib.dva); /* uend */ | |
| } | |
| break; | |
| case OP_AIO: /* acknowledge int */ | |
| chan_clr_chi (tt_dib.dva); /* clr int*/ | |
| case OP_TDV: /* test status */ | |
| *dvst = 0; /* no status */ | |
| break; | |
| default: | |
| *dvst = 0; | |
| return SCPE_IERR; | |
| } | |
| return 0; | |
| } | |
| /* Timed input service routine - runs continuously | |
| Only accepts input in TTS_READx state */ | |
| t_stat tti_svc (UNIT *uptr) | |
| { | |
| int32 c, ebcdic; | |
| uint32 st; | |
| if ((c = sim_poll_kbd ()) < SCPE_KFLAG) /* no char or err? */ | |
| return c; | |
| if (c & SCPE_BREAK) { /* break? */ | |
| if (tt_cmd == TTS_WRITE) { /* during write? */ | |
| tt_cmd = TTS_IDLE; | |
| sim_cancel (&tt_unit[TTO]); /* cancel write */ | |
| chan_uen (tt_dib.dva); /* uend */ | |
| } | |
| return SCPE_OK; | |
| } | |
| c = c & 0x7F; | |
| if (c == tti_panel) /* panel interrupt? */ | |
| return io_set_pint (); | |
| uptr->pos = uptr->pos + 1; /* incr count */ | |
| if (c == '\r') /* map CR to NL */ | |
| c = '\n'; | |
| if (c == 0x7F) /* map ^H back */ | |
| c = 0x08; | |
| c = sim_tt_inpcvt (c, TT_GET_MODE (uptr->flags)); /* input conversion */ | |
| ebcdic = ascii_to_ebcdic[c]; /* then to EBCDIC */ | |
| tto_echo (c); /* echo character */ | |
| if ((tt_cmd & 0x7F) == TTS_READ) { /* waiting for input? */ | |
| st = chan_WrMemB (tt_dib.dva, ebcdic); /* write to memory */ | |
| if (CHS_IFERR (st)) /* channel error? */ | |
| return tt_chan_err (st); | |
| if ((st == CHS_ZBC) || (ebcdic == E_EOM) || /* channel end? */ | |
| ((tt_cmd == TTS_READS) && ((ebcdic == E_HT) || (ebcdic == E_NL)))) { | |
| tt_cmd = TTS_END; /* new state */ | |
| sim_activate (&tt_unit[TTO], chan_ctl_time); /* start dev thread */ | |
| } | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Output service routine - also acts as overall device thread | |
| Because of possible retry, channel status and converted character | |
| must be preserved across calls. */ | |
| t_stat tto_svc (UNIT *uptr) | |
| { | |
| uint32 c, cmd; | |
| uint32 st; | |
| switch (tt_cmd) { /* case on state */ | |
| case TTS_INIT: /* I/O init */ | |
| st = chan_get_cmd (tt_dib.dva, &cmd); /* get command */ | |
| if (CHS_IFERR (st)) /* channel error? */ | |
| return tt_chan_err (st); | |
| if ((cmd == TTS_WRITE) || /* valid command? */ | |
| ((cmd & 0x7F) == TTS_READ)) | |
| tt_cmd = cmd; /* next state */ | |
| else tt_cmd = TTS_END; /* no, end state */ | |
| sim_activate (uptr, chan_ctl_time); /* continue thread */ | |
| break; | |
| case TTS_WRITE: /* char output */ | |
| st = chan_RdMemB (tt_dib.dva, &c); /* get char */ | |
| if (CHS_IFERR (st)) /* channel error? */ | |
| return tt_chan_err (st); | |
| c = ebcdic_to_ascii[c & 0xFF]; /* convert to ASCII */ | |
| tto_echo (c); /* echo character */ | |
| sim_activate (uptr, uptr->wait); /* continue thread */ | |
| if (st == CHS_ZBC) /* st = zbc? */ | |
| tt_cmd = TTS_END; /* next is end */ | |
| else tt_cmd = TTS_WRITE; /* next is write */ | |
| break; | |
| case TTS_END: /* command done */ | |
| st = chan_end (tt_dib.dva); /* set channel end */ | |
| if (CHS_IFERR (st)) /* channel error? */ | |
| return tt_chan_err (st); | |
| if (st == CHS_CCH) { /* command chain? */ | |
| tt_cmd = TTS_INIT; /* restart thread */ | |
| sim_activate (uptr, chan_ctl_time); | |
| } | |
| else tt_cmd = TTS_IDLE; /* all done */ | |
| break; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Actual tty output routines; simulates horizontal tabs */ | |
| void tto_echo (int32 c) | |
| { | |
| uint32 cnt; | |
| cnt = 1; | |
| if (c == '\r') | |
| tto_pos = 0; | |
| else if (c == '\n') { | |
| tto_pos = 0; | |
| sim_putchar ('\r'); | |
| tt_unit[TTO].pos = tt_unit[TTO].pos + 1; | |
| } | |
| else if (c == '\t') { | |
| c = ' '; | |
| cnt = 8 - (tto_pos % 8); | |
| } | |
| else c = sim_tt_outcvt (c, TT_GET_MODE (tt_unit[TTO].flags)); | |
| if (c >= 0) { | |
| while (cnt-- > 0) { | |
| sim_putchar (c); | |
| tto_pos++; | |
| tt_unit[TTO].pos = tt_unit[TTO].pos + 1; | |
| } | |
| } | |
| return; | |
| } | |
| /* TTY status routine */ | |
| uint32 tt_tio_status (void) | |
| { | |
| if (tt_cmd == TTS_IDLE) | |
| return DVS_AUTO; | |
| return (CC2 << DVT_V_CC) | DVS_DBUSY | DVS_CBUSY | DVS_AUTO; | |
| } | |
| /* Channel error */ | |
| t_stat tt_chan_err (uint32 st) | |
| { | |
| tt_cmd = TTS_IDLE; | |
| sim_cancel (&tt_unit[TTO]); /* stop dev thread */ | |
| chan_uen (tt_dib.dva); /* uend */ | |
| if (st < CHS_ERR) | |
| return st; | |
| return SCPE_OK; | |
| } | |
| /* Reset routine */ | |
| t_stat tt_reset (DEVICE *dptr) | |
| { | |
| rtc_register (RTC_TTI, tti_tps, &tt_unit[TTI]); /* register timer */ | |
| sim_cancel (&tt_unit[TTO]); /* stop dev thread */ | |
| tt_cmd = TTS_IDLE; /* idle */ | |
| chan_reset_dev (tt_dib.dva); /* clr int, active */ | |
| tto_pos = 0; | |
| return SCPE_OK; | |
| } | |
| /* Make mode flags uniform */ | |
| t_stat tt_set_mode (UNIT *uptr, int32 val, CONST 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; | |
| } |