| /* sds_mux.c: SDS 940 terminal multiplexor simulator | |
| Copyright (c) 2001-2008, 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. | |
| mux terminal multiplexor | |
| 19-Nov-08 RMS Revixed for common TMXR show routines | |
| 29-Dec-06 RMS Revised to use console conversion routines | |
| 29-Jun-05 RMS Added SET MUXLn DISCONNECT | |
| 21-Jun-05 RMS Fixed bug in SHOW CONN/STATS | |
| 05-Jan-04 RMS Revised for tmxr library changes | |
| 09-May-03 RMS Added network device flag | |
| This module implements up to 32 individual serial interfaces, representing | |
| either the project Genie terminal multiplexor or the SDS 940 CTE option. | |
| */ | |
| #include "sds_defs.h" | |
| #include "sim_sock.h" | |
| #include "sim_tmxr.h" | |
| #include <ctype.h> | |
| #define PROJ_GENIE (cpu_unit.flags & UNIT_GENIE) | |
| #define MUX_NUMLIN mux_desc.lines | |
| #define MUX_LINES 32 /* lines */ | |
| #define MUX_FLAGS 4 /* intr per line */ | |
| #define MUX_FLAGMASK (MUX_FLAGS - 1) | |
| #define MUX_SCANMAX (MUX_LINES * MUX_FLAGS) /* flags to scan */ | |
| #define MUX_SCANMASK (MUX_SCANMAX - 1) | |
| #define MUX_INIT_POLL 8000 | |
| #define MUXL_WAIT 500 | |
| #define MUX_SETFLG(l,x) mux_flags[((l) * MUX_FLAGS) + (x)] = 1 | |
| #define MUX_SETINT(x) int_req = int_req | (INT_MUXR >> (x)) | |
| #define MUX_CLRINT(x) int_req = int_req & ~(INT_MUXR >> (x)) | |
| /* PIN/POT */ | |
| #define P_V_CHAR 16 /* char */ | |
| #define P_M_CHAR 0377 | |
| #define P_CHAR(x) (((x) >> P_V_CHAR) & P_M_CHAR) | |
| #define PIN_OVR 000100000 /* overrun */ | |
| #define POT_NOX 000100000 /* no xmit */ | |
| #define POT_XMI 000040000 /* xmit int */ | |
| #define POT_GLNE 000020000 /* Genie: enable */ | |
| #define POT_SCDT 000020000 /* 940: clr DTR */ | |
| #define P_V_CHAN 0 /* channel */ | |
| #define P_M_CHAN (MUX_LINES - 1) | |
| #define P_CHAN(x) (((x) >> P_V_CHAN) & P_M_CHAN) | |
| /* SKS 940 */ | |
| #define SKS_XBE 000001000 /* xmt buf empty */ | |
| #define SKS_CRO 000000400 /* carrier on */ | |
| #define SKS_DSR 000000200 /* data set ready */ | |
| #define SKS_CHAN(x) P_CHAN(x) | |
| /* SKS Genie */ | |
| #define SKG_V_CHAN 7 | |
| #define SKG_M_CHAN (MUX_LINES - 1) | |
| #define SKG_CHAN(x) (((x) >> SKG_V_CHAN) & SKG_M_CHAN) | |
| /* Flags */ | |
| #define MUX_FRCV 0 /* receive */ | |
| #define MUX_FXMT 1 /* transmit */ | |
| #define MUX_FCRN 2 /* carrier on */ | |
| #define MUX_FCRF 3 /* carrier off */ | |
| /* Line status */ | |
| #define MUX_SCHP 001 /* char pending */ | |
| #define MUX_SOVR 002 /* overrun */ | |
| #define MUX_SLNE 004 /* line enabled */ | |
| #define MUX_SXIE 010 /* xmt int enab */ | |
| #define MUX_SCRO 020 /* carrier on */ | |
| #define MUX_SDSR 040 /* data set ready */ | |
| /* Data */ | |
| extern uint32 alert, int_req; | |
| extern int32 stop_invins, stop_invdev, stop_inviop; | |
| extern UNIT cpu_unit; | |
| uint8 mux_rbuf[MUX_LINES]; /* rcv buf */ | |
| uint8 mux_xbuf[MUX_LINES]; /* xmt buf */ | |
| uint8 mux_sta[MUX_LINES]; /* status */ | |
| uint8 mux_flags[MUX_SCANMAX]; /* flags */ | |
| uint32 mux_tps = 100; /* polls/second */ | |
| uint32 mux_scan = 0; /* scanner */ | |
| uint32 mux_slck = 0; /* scanner locked */ | |
| TMLN mux_ldsc[MUX_LINES] = { 0 }; /* line descriptors */ | |
| TMXR mux_desc = { MUX_LINES, 0, 0, mux_ldsc }; /* mux descriptor */ | |
| t_stat mux (uint32 fnc, uint32 inst, uint32 *dat); | |
| t_stat muxi_svc (UNIT *uptr); | |
| t_stat muxo_svc (UNIT *uptr); | |
| t_stat mux_reset (DEVICE *dptr); | |
| t_stat mux_attach (UNIT *uptr, char *cptr); | |
| t_stat mux_detach (UNIT *uptr); | |
| t_stat mux_summ (FILE *st, UNIT *uptr, int32 val, void *desc); | |
| t_stat mux_show (FILE *st, UNIT *uptr, int32 val, void *desc); | |
| t_stat mux_vlines (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| void mux_reset_ln (int32 ln); | |
| void mux_scan_next (void); | |
| /* MUX data structures | |
| mux_dev MUX device descriptor | |
| mux_unit MUX unit descriptor | |
| mux_reg MUX register list | |
| mux_mod MUX modifiers list | |
| */ | |
| DIB mux_dib = { -1, DEV3_GMUX, 0, NULL, &mux }; | |
| UNIT mux_unit = { UDATA (&muxi_svc, UNIT_ATTABLE, 0), MUX_INIT_POLL }; | |
| REG mux_reg[] = { | |
| { BRDATA (STA, mux_sta, 8, 6, MUX_LINES) }, | |
| { BRDATA (RBUF, mux_rbuf, 8, 8, MUX_LINES) }, | |
| { BRDATA (XBUF, mux_xbuf, 8, 8, MUX_LINES) }, | |
| { BRDATA (INT, mux_flags, 8, 1, MUX_SCANMAX) }, | |
| { ORDATA (SCAN, mux_scan, 7) }, | |
| { FLDATA (SLCK, mux_slck, 0) }, | |
| { DRDATA (TPS, mux_tps, 8), REG_NZ + PV_LEFT }, | |
| { NULL } | |
| }; | |
| MTAB mux_mod[] = { | |
| { MTAB_XTD | MTAB_VDV, 0, "LINES", "LINES", | |
| &mux_vlines, tmxr_show_lines, (void *) &mux_desc }, | |
| { MTAB_XTD | MTAB_VDV, 1, NULL, "DISCONNECT", | |
| &tmxr_dscln, NULL, &mux_desc }, | |
| { UNIT_ATT, UNIT_ATT, "summary", NULL, | |
| NULL, &tmxr_show_summ, (void *) &mux_desc }, | |
| { MTAB_XTD | MTAB_VDV | MTAB_NMO, 1, "CONNECTIONS", NULL, | |
| NULL, &tmxr_show_cstat, (void *) &mux_desc }, | |
| { MTAB_XTD | MTAB_VDV | MTAB_NMO, 0, "STATISTICS", NULL, | |
| NULL, &tmxr_show_cstat, (void *) &mux_desc }, | |
| { 0 } | |
| }; | |
| DEVICE mux_dev = { | |
| "MUX", &mux_unit, mux_reg, mux_mod, | |
| 1, 10, 31, 1, 8, 8, | |
| &tmxr_ex, &tmxr_dep, &mux_reset, | |
| NULL, &mux_attach, &mux_detach, | |
| &mux_dib, DEV_NET | DEV_DISABLE | |
| }; | |
| /* MUXL data structures | |
| muxl_dev MUXL device descriptor | |
| muxl_unit MUXL unit descriptor | |
| muxl_reg MUXL register list | |
| muxl_mod MUXL modifiers list | |
| */ | |
| UNIT muxl_unit[] = { | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT }, | |
| { UDATA (&muxo_svc, TT_MODE_UC, 0), MUXL_WAIT } | |
| }; | |
| MTAB muxl_mod[] = { | |
| { TT_MODE, TT_MODE_UC, "UC", "UC", NULL }, | |
| { TT_MODE, TT_MODE_7B, "7b", "7B", NULL }, | |
| { TT_MODE, TT_MODE_8B, "8b", "8B", NULL }, | |
| { TT_MODE, TT_MODE_7P, "7p", "7P", NULL }, | |
| { MTAB_XTD|MTAB_VUN, 0, NULL, "DISCONNECT", | |
| &tmxr_dscln, NULL, &mux_desc }, | |
| { MTAB_XTD|MTAB_VUN|MTAB_NC, 0, "LOG", "LOG", | |
| &tmxr_set_log, &tmxr_show_log, &mux_desc }, | |
| { MTAB_XTD|MTAB_VUN|MTAB_NC, 0, NULL, "NOLOG", | |
| &tmxr_set_nolog, NULL, &mux_desc }, | |
| { 0 } | |
| }; | |
| REG muxl_reg[] = { | |
| { URDATA (TIME, muxl_unit[0].wait, 10, 24, 0, | |
| MUX_LINES, REG_NZ + PV_LEFT) }, | |
| { NULL } | |
| }; | |
| DEVICE muxl_dev = { | |
| "MUXL", muxl_unit, muxl_reg, muxl_mod, | |
| MUX_LINES, 10, 31, 1, 8, 8, | |
| NULL, NULL, &mux_reset, | |
| NULL, NULL, NULL, | |
| NULL, 0 | |
| }; | |
| /* MUX: IO routine */ | |
| /* Mux routine - EOM 30001 or EOM 77777,2 */ | |
| t_stat mux (uint32 fnc, uint32 inst, uint32 *dat) | |
| { | |
| uint32 ln; | |
| switch (fnc) { | |
| case IO_CONN: /* connect */ | |
| if ((PROJ_GENIE && (inst == 000230001)) || /* set alert */ | |
| (!PROJ_GENIE && (inst == 020277777))) | |
| alert = POT_MUX; | |
| else CRETINS; | |
| break; | |
| case IO_SKS: /* skip */ | |
| if (PROJ_GENIE && ((inst & 077770077) == 004030001)) { | |
| ln = SKG_CHAN (inst); /* get line */ | |
| if (!sim_is_active (&muxl_unit[ln])) | |
| *dat = 1; | |
| } | |
| else if (!PROJ_GENIE && ((inst & 077776000) == 024076000)) { | |
| ln = SKS_CHAN (inst); /* get line */ | |
| if (inst & (SKS_XBE|SKS_CRO|SKS_DSR)) *dat = 1; | |
| if (((inst & SKS_XBE) && sim_is_active (&muxl_unit[ln])) || | |
| ((inst & SKS_CRO) && !(mux_sta[ln] & MUX_SCRO)) || | |
| ((inst & SKS_DSR) && !(mux_sta[ln] & MUX_SDSR))) | |
| *dat = 0; /* no skip if fail */ | |
| } | |
| else CRETINS; | |
| default: | |
| return SCPE_IERR; | |
| } /* end case */ | |
| return SCPE_OK; | |
| } | |
| /* PIN routine */ | |
| t_stat pin_mux (uint32 num, uint32 *dat) | |
| { | |
| uint32 ln = mux_scan >> 2; | |
| uint32 flag = mux_scan & MUX_FLAGMASK; | |
| mux_scan = mux_scan & MUX_SCANMASK; /* mask scan */ | |
| mux_flags[mux_scan] = 0; /* clear flag */ | |
| if (flag == MUX_FRCV) { /* rcv event? */ | |
| *dat = ln | ((uint32) mux_rbuf[ln] << P_V_CHAR) | /* line + char + */ | |
| ((mux_sta[ln] & MUX_SOVR)? PIN_OVR: 0); /* overrun */ | |
| mux_sta[ln] = mux_sta[ln] & ~(MUX_SCHP | MUX_SOVR); | |
| } | |
| else *dat = ln; /* just line */ | |
| mux_slck = 0; /* unlock scanner */ | |
| mux_scan_next (); /* kick scanner */ | |
| return SCPE_OK; | |
| } | |
| t_stat pot_mux (uint32 num, uint32 *dat) | |
| { | |
| uint32 ln = P_CHAN (*dat); | |
| uint32 chr = P_CHAR (*dat); | |
| if (PROJ_GENIE && ((*dat & POT_GLNE) == 0)) { /* Genie disable? */ | |
| mux_sta[ln] = mux_sta[ln] & ~MUX_SLNE; /* clear status */ | |
| mux_ldsc[ln].rcve = 0; | |
| } | |
| else if (!PROJ_GENIE && (*dat & POT_SCDT)) { /* SDS disable? */ | |
| if (mux_ldsc[ln].conn) { /* connected? */ | |
| tmxr_linemsg (&mux_ldsc[ln], "\r\nLine hangup\r\n"); | |
| tmxr_reset_ln (&mux_ldsc[ln]); /* reset line */ | |
| mux_reset_ln (ln); /* reset state */ | |
| MUX_SETFLG (ln, MUX_FCRF); /* set carrier off */ | |
| mux_scan_next (); /* kick scanner */ | |
| } | |
| mux_sta[ln] = mux_sta[ln] & ~MUX_SLNE; /* clear status */ | |
| mux_ldsc[ln].rcve = 0; | |
| } | |
| else { /* enabled */ | |
| if ((*dat & POT_NOX) == 0) { /* output char? */ | |
| mux_xbuf[ln] = chr; /* store char */ | |
| sim_activate (&muxl_unit[ln], muxl_unit[ln].wait); | |
| } | |
| if (*dat & POT_XMI) | |
| mux_sta[ln] = mux_sta[ln] | MUX_SXIE; | |
| else mux_sta[ln] = mux_sta[ln] & ~MUX_SXIE; | |
| mux_sta[ln] = mux_sta[ln] | MUX_SLNE; /* line is enabled */ | |
| mux_ldsc[ln].rcve = 1; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Unit service - receive side | |
| Poll all active lines for input | |
| Poll for new connections | |
| */ | |
| t_stat muxi_svc (UNIT *uptr) | |
| { | |
| int32 ln, c, t; | |
| if ((uptr->flags & UNIT_ATT) == 0) /* attached? */ | |
| return SCPE_OK; | |
| t = sim_rtcn_calb (mux_tps, TMR_MUX); /* calibrate */ | |
| sim_activate (uptr, t); /* continue poll */ | |
| ln = tmxr_poll_conn (&mux_desc); /* look for connect */ | |
| if (ln >= 0) { /* got one? */ | |
| if (!PROJ_GENIE && (mux_sta[ln] & MUX_SLNE)) { /* modem & DTR? */ | |
| mux_sta[ln] = mux_sta[ln] | (MUX_SCRO|MUX_SDSR);/* carrier on */ | |
| MUX_SETFLG (ln, MUX_FCRN); /* set carr on flag */ | |
| mux_scan_next (); /* kick scanner */ | |
| } | |
| mux_ldsc[ln].rcve = 1; /* set rcv enable */ | |
| } | |
| tmxr_poll_rx (&mux_desc); /* poll for input */ | |
| for (ln = 0; ln < MUX_NUMLIN; ln++) { /* loop thru lines */ | |
| if (mux_ldsc[ln].conn) { /* connected? */ | |
| if (c = tmxr_getc_ln (&mux_ldsc[ln])) { /* get char */ | |
| if (mux_sta[ln] & MUX_SCHP) /* already got one? */ | |
| mux_sta[ln] = mux_sta[ln] | MUX_SOVR; /* overrun */ | |
| else mux_sta[ln] = mux_sta[ln] | MUX_SCHP; /* char pending */ | |
| if (c & SCPE_BREAK) /* break? */ | |
| c = 0; | |
| else c = sim_tt_inpcvt (c, TT_GET_MODE (muxl_unit[ln].flags)); | |
| mux_rbuf[ln] = c; /* save char */ | |
| MUX_SETFLG (ln, MUX_FRCV); /* set rcv flag */ | |
| mux_scan_next (); /* kick scanner */ | |
| } | |
| } | |
| else mux_sta[ln] = 0; /* disconnected */ | |
| } /* end for */ | |
| return SCPE_OK; | |
| } | |
| /* Unit service - transmit side */ | |
| t_stat muxo_svc (UNIT *uptr) | |
| { | |
| int32 c; | |
| uint32 ln = uptr - muxl_unit; /* line # */ | |
| if (mux_ldsc[ln].conn) { /* connected? */ | |
| if (mux_ldsc[ln].xmte) { /* xmt enabled? */ | |
| c = sim_tt_outcvt (mux_xbuf[ln], TT_GET_MODE (muxl_unit[ln].flags)); | |
| if (c >= 0) /* output char */ | |
| tmxr_putc_ln (&mux_ldsc[ln], c); | |
| tmxr_poll_tx (&mux_desc); /* poll xmt */ | |
| } | |
| else { /* buf full */ | |
| tmxr_poll_tx (&mux_desc); /* poll xmt */ | |
| sim_activate (uptr, muxl_unit[ln].wait); /* wait */ | |
| return SCPE_OK; | |
| } | |
| } | |
| if (mux_sta[ln] & MUX_SXIE) { | |
| MUX_SETFLG (ln, MUX_FXMT); /* set flag */ | |
| mux_scan_next (); /* kick scanner */ | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Kick scanner */ | |
| void mux_scan_next (void) | |
| { | |
| int32 i; | |
| if (mux_slck) /* locked? */ | |
| return; | |
| for (i = 0; i < MUX_SCANMAX; i++) { /* scan flags */ | |
| mux_scan = (mux_scan + 1) & MUX_SCANMASK; /* next flag */ | |
| if (mux_flags[mux_scan]) { /* flag set? */ | |
| mux_slck = 1; /* lock scanner */ | |
| MUX_SETINT (mux_scan & MUX_FLAGMASK); /* request int */ | |
| return; | |
| } | |
| } | |
| return; | |
| } | |
| /* Reset routine */ | |
| t_stat mux_reset (DEVICE *dptr) | |
| { | |
| int32 i, t; | |
| if (mux_dev.flags & DEV_DIS) /* master disabled? */ | |
| muxl_dev.flags = muxl_dev.flags | DEV_DIS; /* disable lines */ | |
| else muxl_dev.flags = muxl_dev.flags & ~DEV_DIS; | |
| if (mux_unit.flags & UNIT_ATT) { /* master att? */ | |
| if (!sim_is_active (&mux_unit)) { | |
| t = sim_rtcn_init (mux_unit.wait, TMR_MUX); | |
| sim_activate (&mux_unit, t); /* activate */ | |
| } | |
| } | |
| else sim_cancel (&mux_unit); /* else stop */ | |
| for (i = 0; i < MUX_LINES; i++) | |
| mux_reset_ln (i); | |
| for (i = 0; i < MUX_FLAGS; i++) /* clear all ints */ | |
| MUX_CLRINT (i); | |
| return SCPE_OK; | |
| } | |
| /* Attach master unit */ | |
| t_stat mux_attach (UNIT *uptr, char *cptr) | |
| { | |
| t_stat r; | |
| int32 t; | |
| r = tmxr_attach (&mux_desc, uptr, cptr); /* attach */ | |
| if (r != SCPE_OK) /* error */ | |
| return r; | |
| t = sim_rtcn_init (mux_unit.wait, TMR_MUX); | |
| sim_activate (uptr, t); /* start poll */ | |
| return SCPE_OK; | |
| } | |
| /* Detach master unit */ | |
| t_stat mux_detach (UNIT *uptr) | |
| { | |
| int32 i; | |
| t_stat r; | |
| r = tmxr_detach (&mux_desc, uptr); /* detach */ | |
| for (i = 0; i < MUX_LINES; i++) /* disable rcv */ | |
| mux_ldsc[i].rcve = 0; | |
| sim_cancel (uptr); /* stop poll */ | |
| return r; | |
| } | |
| /* Change number of lines */ | |
| t_stat mux_vlines (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| int32 newln, i, t; | |
| t_stat r; | |
| if (cptr == NULL) | |
| return SCPE_ARG; | |
| newln = get_uint (cptr, 10, MUX_LINES, &r); | |
| if ((r != SCPE_OK) || (newln == MUX_NUMLIN)) | |
| return r; | |
| if (newln == 0) | |
| return SCPE_ARG; | |
| if (newln < MUX_NUMLIN) { | |
| for (i = newln, t = 0; i < MUX_NUMLIN; i++) | |
| t = t | mux_ldsc[i].conn; | |
| if (t && !get_yn ("This will disconnect users; proceed [N]?", FALSE)) | |
| return SCPE_OK; | |
| for (i = newln; i < MUX_NUMLIN; i++) { | |
| if (mux_ldsc[i].conn) { | |
| tmxr_linemsg (&mux_ldsc[i], "\r\nOperator disconnected line\r\n"); | |
| tmxr_reset_ln (&mux_ldsc[i]); /* reset line */ | |
| } | |
| muxl_unit[i].flags = muxl_unit[i].flags | UNIT_DIS; | |
| mux_reset_ln (i); | |
| } | |
| } | |
| else { | |
| for (i = MUX_NUMLIN; i < newln; i++) { | |
| muxl_unit[i].flags = muxl_unit[i].flags & ~UNIT_DIS; | |
| mux_reset_ln (i); | |
| } | |
| } | |
| MUX_NUMLIN = newln; | |
| return SCPE_OK; | |
| } | |
| /* Reset an individual line */ | |
| void mux_reset_ln (int32 ln) | |
| { | |
| int32 flg = ln * MUX_FLAGS; | |
| if (mux_ldsc[ln].conn) | |
| mux_sta[ln] = MUX_SCRO | MUX_SDSR; | |
| else mux_sta[ln] = 0; | |
| sim_cancel (&muxl_unit[ln]); | |
| mux_flags[flg + MUX_FRCV] = 0; | |
| mux_flags[flg + MUX_FXMT] = 0; | |
| mux_flags[flg + MUX_FCRN] = 0; | |
| mux_flags[flg + MUX_FCRF] = 0; | |
| return; | |
| } |