| /* pdp18b_rp.c: RP15/RP02 disk pack 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. | |
| rp RP15/RP02 disk pack | |
| 14-Jan-04 RMS Revised IO device call interface | |
| 06-Feb-03 RMS Revised IOT decoding, fixed bug in initiation | |
| 05-Oct-02 RMS Added DIB, device number support | |
| 06-Jan-02 RMS Revised enable/disable support | |
| 29-Nov-01 RMS Added read only unit support | |
| 25-Nov-01 RMS Revised interrupt structure | |
| Changed FLG to array | |
| 26-Apr-01 RMS Added device enable/disable support | |
| 14-Apr-99 RMS Changed t_addr to unsigned | |
| 29-Jun-96 RMS Added unit enable/disable support | |
| */ | |
| #include "pdp18b_defs.h" | |
| /* Constants */ | |
| #define RP_NUMWD 256 /* words/sector */ | |
| #define RP_NUMSC 10 /* sectors/surface */ | |
| #define RP_NUMSF 20 /* surfaces/cylinder */ | |
| #define RP_NUMCY 203 /* cylinders/drive */ | |
| #define RP_NUMDR 8 /* drives/controller */ | |
| #define RP_SIZE (RP_NUMCY * RP_NUMSF * RP_NUMSC * RP_NUMWD) | |
| /* words/drive */ | |
| /* Unit specific flags */ | |
| #define UNIT_V_WLK (UNIT_V_UF + 0) /* hwre write lock */ | |
| #define UNIT_WLK (1u << UNIT_V_WLK) | |
| #define UNIT_WPRT (UNIT_WLK | UNIT_RO) /* write protect */ | |
| /* Parameters in the unit descriptor */ | |
| #define CYL u3 /* current cylinder */ | |
| #define FUNC u4 /* function */ | |
| /* Status register A */ | |
| #define STA_V_UNIT 15 /* unit select */ | |
| #define STA_M_UNIT 07 | |
| #define STA_V_FUNC 12 /* function */ | |
| #define STA_M_FUNC 07 | |
| #define FN_IDLE 0 | |
| #define FN_READ 1 | |
| #define FN_WRITE 2 | |
| #define FN_RECAL 3 | |
| #define FN_SEEK 4 | |
| #define FN_RDALL 5 | |
| #define FN_WRALL 6 | |
| #define FN_WRCHK 7 | |
| #define FN_2ND 010 /* second state flag */ | |
| #define STA_IED 0004000 /* int enable done */ | |
| #define STA_IEA 0002000 /* int enable attn */ | |
| #define STA_GO 0001000 /* go */ | |
| #define STA_WPE 0000400 /* write lock error */ | |
| #define STA_NXC 0000200 /* nx cyl error */ | |
| #define STA_NXF 0000100 /* nx surface error */ | |
| #define STA_NXS 0000040 /* nx sector error */ | |
| #define STA_HNF 0000020 /* hdr not found */ | |
| #define STA_SUWP 0000010 /* sel unit wrt lock */ | |
| #define STA_SUSI 0000004 /* sel unit seek inc */ | |
| #define STA_DON 0000002 /* done */ | |
| #define STA_ERR 0000001 /* error */ | |
| #define STA_RW 0777000 /* read/write */ | |
| #define STA_EFLGS (STA_WPE | STA_NXC | STA_NXF | STA_NXS | \ | |
| STA_HNF | STA_SUSI) /* error flags */ | |
| #define STA_DYN (STA_SUWP | STA_SUSI) /* per unit status */ | |
| #define GET_UNIT(x) (((x) >> STA_V_UNIT) & STA_M_UNIT) | |
| #define GET_FUNC(x) (((x) >> STA_V_FUNC) & STA_M_FUNC) | |
| /* Status register B */ | |
| #define STB_V_ATT0 17 /* unit 0 attention */ | |
| #define STB_ATTN 0776000 /* attention flags */ | |
| #define STB_SUFU 0001000 /* sel unit unsafe */ | |
| #define STB_PGE 0000400 /* programming error */ | |
| #define STB_EOP 0000200 /* end of pack */ | |
| #define STB_TME 0000100 /* timing error */ | |
| #define STB_FME 0000040 /* format error */ | |
| #define STB_WCE 0000020 /* write check error */ | |
| #define STB_WPE 0000010 /* word parity error */ | |
| #define STB_LON 0000004 /* long parity error */ | |
| #define STB_SUSU 0000002 /* sel unit seeking */ | |
| #define STB_SUNR 0000001 /* sel unit not rdy */ | |
| #define STB_EFLGS (STB_SUFU | STB_PGE | STB_EOP | STB_TME | STB_FME | \ | |
| STB_WCE | STB_WPE | STB_LON ) /* error flags */ | |
| #define STB_DYN (STB_SUFU | STB_SUSU | STB_SUNR) /* per unit */ | |
| /* Disk address */ | |
| #define DA_V_SECT 0 /* sector */ | |
| #define DA_M_SECT 017 | |
| #define DA_V_SURF 5 | |
| #define DA_M_SURF 037 | |
| #define DA_V_CYL 10 /* cylinder */ | |
| #define DA_M_CYL 0377 | |
| #define GET_SECT(x) (((x) >> DA_V_SECT) & DA_M_SECT) | |
| #define GET_SURF(x) (((x) >> DA_V_SURF) & DA_M_SURF) | |
| #define GET_CYL(x) (((x) >> DA_V_CYL) & DA_M_CYL) | |
| #define GET_DA(x) ((((GET_CYL (x) * RP_NUMSF) + GET_SURF (x)) * \ | |
| RP_NUMSC) + GET_SECT (x)) | |
| #define RP_MIN 2 | |
| #define MAX(x,y) (((x) > (y))? (x): (y)) | |
| extern int32 M[]; | |
| extern int32 int_hwre[API_HLVL+1], nexm; | |
| extern UNIT cpu_unit; | |
| int32 rp_sta = 0; /* status A */ | |
| int32 rp_stb = 0; /* status B */ | |
| int32 rp_ma = 0; /* memory address */ | |
| int32 rp_da = 0; /* disk address */ | |
| int32 rp_wc = 0; /* word count */ | |
| int32 rp_busy = 0; /* busy */ | |
| int32 rp_stopioe = 1; /* stop on error */ | |
| int32 rp_swait = 10; /* seek time */ | |
| int32 rp_rwait = 10; /* rotate time */ | |
| DEVICE rp_dev; | |
| int32 rp63 (int32 dev, int32 pulse, int32 dat); | |
| int32 rp64 (int32 dev, int32 pulse, int32 dat); | |
| int32 rp_iors (void); | |
| t_stat rp_svc (UNIT *uptr); | |
| void rp_updsta (int32 newa, int32 newb); | |
| t_stat rp_reset (DEVICE *dptr); | |
| t_stat rp_attach (UNIT *uptr, char *cptr); | |
| t_stat rp_detach (UNIT *uptr); | |
| /* RP15 data structures | |
| rp_dev RP device descriptor | |
| rp_unit RP unit list | |
| rp_reg RP register list | |
| rp_mod RP modifier list | |
| */ | |
| DIB rp_dib = { DEV_RP, 2, &rp_iors, { &rp63, &rp64 } }; | |
| UNIT rp_unit[] = { | |
| { UDATA (&rp_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE, RP_SIZE) }, | |
| { UDATA (&rp_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE, RP_SIZE) }, | |
| { UDATA (&rp_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE, RP_SIZE) }, | |
| { UDATA (&rp_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE, RP_SIZE) }, | |
| { UDATA (&rp_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE, RP_SIZE) }, | |
| { UDATA (&rp_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE, RP_SIZE) }, | |
| { UDATA (&rp_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE, RP_SIZE) }, | |
| { UDATA (&rp_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE, RP_SIZE) } | |
| }; | |
| REG rp_reg[] = { | |
| { ORDATA (STA, rp_sta, 18) }, | |
| { ORDATA (STB, rp_stb, 18) }, | |
| { ORDATA (DA, rp_da, 18) }, | |
| { ORDATA (MA, rp_ma, 18) }, | |
| { ORDATA (WC, rp_wc, 18) }, | |
| { FLDATA (INT, int_hwre[API_RP], INT_V_RP) }, | |
| { FLDATA (BUSY, rp_busy, 0) }, | |
| { FLDATA (STOP_IOE, rp_stopioe, 0) }, | |
| { DRDATA (STIME, rp_swait, 24), PV_LEFT }, | |
| { DRDATA (RTIME, rp_rwait, 24), PV_LEFT }, | |
| { ORDATA (DEVNO, rp_dib.dev, 6), REG_HRO }, | |
| { NULL } | |
| }; | |
| MTAB rp_mod[] = { | |
| { UNIT_WLK, 0, "write enabled", "WRITEENABLED", NULL }, | |
| { UNIT_WLK, UNIT_WLK, "write locked", "LOCKED", NULL }, | |
| { MTAB_XTD|MTAB_VDV, 0, "DEVNO", "DEVNO", &set_devno, &show_devno }, | |
| { 0 } | |
| }; | |
| DEVICE rp_dev = { | |
| "RP", rp_unit, rp_reg, rp_mod, | |
| RP_NUMDR, 8, 24, 1, 8, 18, | |
| NULL, NULL, &rp_reset, | |
| NULL, &rp_attach, &rp_detach, | |
| &rp_dib, DEV_DISABLE | |
| }; | |
| /* IOT routines */ | |
| int32 rp63 (int32 dev, int32 pulse, int32 dat) | |
| { | |
| int32 sb = pulse & 060; /* subopcode */ | |
| rp_updsta (0, 0); | |
| if (pulse & 01) { | |
| if ((sb == 000) && /* DPSF */ | |
| ((rp_sta & (STA_DON | STA_ERR)) || (rp_stb & STB_ATTN))) | |
| dat = IOT_SKP | dat; | |
| else if ((sb == 020) && (rp_stb & STB_ATTN)) /* DPSA */ | |
| dat = IOT_SKP | dat; | |
| else if ((sb == 040) && (rp_sta & STA_DON)) /* DPSJ */ | |
| dat = IOT_SKP | dat; | |
| else if ((sb == 060) && (rp_sta & STA_ERR)) /* DPSE */ | |
| dat = IOT_SKP | dat; | |
| } | |
| if (pulse & 02) { | |
| if (sb == 000) /* DPOSA */ | |
| dat = dat | rp_sta; | |
| else if (sb == 020) /* DPOSB */ | |
| dat = dat | rp_stb; | |
| } | |
| if (pulse & 04) { | |
| if (rp_busy) { /* busy? */ | |
| rp_updsta (0, STB_PGE); | |
| return dat; | |
| } | |
| else if (sb == 000) { /* DPLA */ | |
| rp_da = dat & DMASK; | |
| if (GET_SECT (rp_da) >= RP_NUMSC) | |
| rp_updsta (STA_NXS, 0); | |
| if (GET_SURF (rp_da) >= RP_NUMSF) | |
| rp_updsta (STA_NXF, 0); | |
| if (GET_CYL (rp_da) >= RP_NUMCY) | |
| rp_updsta (STA_NXC, 0); | |
| } | |
| else if (sb == 020) { /* DPCS */ | |
| rp_sta = rp_sta & ~(STA_HNF | STA_DON); | |
| rp_stb = rp_stb & ~(STB_FME | STB_WPE | STB_LON | STB_WCE | | |
| STB_TME | STB_PGE | STB_EOP); | |
| rp_updsta (0, 0); | |
| } | |
| else if (sb == 040) /* DPCA */ | |
| rp_ma = dat & DMASK; | |
| else if (sb == 060) /* DPWC */ | |
| rp_wc = dat & DMASK; | |
| } | |
| return dat; | |
| } | |
| /* IOT 64 */ | |
| int32 rp64 (int32 dev, int32 pulse, int32 dat) | |
| { | |
| int32 u, f, c, sb; | |
| UNIT *uptr; | |
| sb = pulse & 060; | |
| if (pulse & 01) { | |
| if (sb == 020) /* DPSN */ | |
| dat = IOT_SKP | dat; | |
| } | |
| if (pulse & 02) { | |
| if (sb == 000) /* DPOU */ | |
| dat = dat | rp_unit[GET_UNIT (rp_sta)].CYL; | |
| else if (sb == 020) /* DPOA */ | |
| dat = dat | rp_da; | |
| else if (sb == 040) /* DPOC */ | |
| dat = dat | rp_ma; | |
| else if (sb == 060) /* DPOW */ | |
| dat = dat | rp_wc; | |
| } | |
| if (pulse & 04) { | |
| if (rp_busy) { /* busy? */ | |
| rp_updsta (0, STB_PGE); | |
| return dat; | |
| } | |
| if (sb == 000) /* DPCF */ | |
| rp_sta = rp_sta & ~STA_RW; | |
| else if (sb == 020) /* DPLZ */ | |
| rp_sta = rp_sta & (dat | ~STA_RW); | |
| else if (sb == 040) /* DPLO */ | |
| rp_sta = rp_sta | (dat & STA_RW); | |
| else if (sb == 060) /* DPLF */ | |
| rp_sta = (rp_sta & ~STA_RW) | (dat & STA_RW); | |
| rp_sta = rp_sta & ~STA_DON; /* clear done */ | |
| u = GET_UNIT (rp_sta); /* get unit num */ | |
| uptr = rp_dev.units + u; /* select unit */ | |
| if ((rp_sta & STA_GO) && !sim_is_active (uptr)) { | |
| f = uptr->FUNC = GET_FUNC (rp_sta); /* get function */ | |
| rp_busy = 1; /* set ctrl busy */ | |
| rp_sta = rp_sta & ~(STA_HNF | STA_DON); /* clear flags */ | |
| rp_stb = rp_stb & ~(STB_FME | STB_WPE | STB_LON | STB_WCE | | |
| STB_TME | STB_PGE | STB_EOP | (1 << (STB_V_ATT0 - u))); | |
| if (((uptr->flags & UNIT_ATT) == 0) || (f == FN_IDLE) || | |
| (f == FN_SEEK) || (f == FN_RECAL)) | |
| sim_activate (uptr, RP_MIN); /* short delay */ | |
| else { | |
| c = GET_CYL (rp_da); | |
| c = abs (c - uptr->CYL) * rp_swait; /* seek time */ | |
| sim_activate (uptr, MAX (RP_MIN, c + rp_rwait)); | |
| } | |
| } | |
| } | |
| rp_updsta (0, 0); | |
| return dat; | |
| } | |
| /* Unit service | |
| If function = idle, clear busy | |
| If seek or recal initial state, clear attention line, compute seek time, | |
| put on cylinder, set second state | |
| If unit not attached, give error | |
| If seek or recal second state, set attention line, compute errors | |
| Else complete data transfer command | |
| The unit control block contains the function and cylinder for | |
| the current command. | |
| */ | |
| static int32 fill[RP_NUMWD] = { 0 }; | |
| t_stat rp_svc (UNIT *uptr) | |
| { | |
| int32 f, u, comp, cyl, sect, surf; | |
| int32 err, pa, da, wc, awc, i; | |
| u = (int32) (uptr - rp_dev.units); /* get drv number */ | |
| f = uptr->FUNC; /* get function */ | |
| if (f == FN_IDLE) { /* idle? */ | |
| rp_busy = 0; /* clear busy */ | |
| return SCPE_OK; | |
| } | |
| if ((f == FN_SEEK) || (f == FN_RECAL)) { /* seek or recal? */ | |
| rp_busy = 0; /* not busy */ | |
| cyl = (f == FN_SEEK)? GET_CYL (rp_da): 0; /* get cylinder */ | |
| sim_activate (uptr, MAX (RP_MIN, abs (cyl - uptr->CYL) * rp_swait)); | |
| uptr->CYL = cyl; /* on cylinder */ | |
| uptr->FUNC = FN_SEEK | FN_2ND; /* set second state */ | |
| rp_updsta (0, 0); /* update status */ | |
| return SCPE_OK; | |
| } | |
| if (f == (FN_SEEK | FN_2ND)) { /* seek done? */ | |
| rp_updsta (0, rp_stb | (1 << (STB_V_ATT0 - u))); /* set attention */ | |
| return SCPE_OK; | |
| } | |
| if ((uptr->flags & UNIT_ATT) == 0) { /* not attached? */ | |
| rp_updsta (STA_DON, STB_SUFU); /* done, unsafe */ | |
| return IORETURN (rp_stopioe, SCPE_UNATT); | |
| } | |
| if ((f == FN_WRITE) && (uptr->flags & UNIT_WPRT)) { /* write locked? */ | |
| rp_updsta (STA_DON | STA_WPE, 0); /* error */ | |
| return SCPE_OK; | |
| } | |
| if (GET_SECT (rp_da) >= RP_NUMSC) | |
| rp_updsta (STA_NXS, 0); | |
| if (GET_SURF (rp_da) >= RP_NUMSF) | |
| rp_updsta (STA_NXF, 0); | |
| if (GET_CYL (rp_da) >= RP_NUMCY) | |
| rp_updsta (STA_NXC, 0); | |
| if (rp_sta & (STA_NXS | STA_NXF | STA_NXC)) { /* or bad disk addr? */ | |
| rp_updsta (STA_DON, STB_SUFU); /* done, unsafe */ | |
| return SCPE_OK; | |
| } | |
| pa = rp_ma & AMASK; /* get mem addr */ | |
| da = GET_DA (rp_da) * RP_NUMWD; /* get disk addr */ | |
| wc = 01000000 - rp_wc; /* get true wc */ | |
| if (((uint32) (pa + wc)) > MEMSIZE) { /* memory overrun? */ | |
| nexm = 1; /* set nexm flag */ | |
| wc = MEMSIZE - pa; /* limit xfer */ | |
| } | |
| if ((da + wc) > RP_SIZE) { /* disk overrun? */ | |
| rp_updsta (0, STB_EOP); /* error */ | |
| wc = RP_SIZE - da; /* limit xfer */ | |
| } | |
| err = fseek (uptr->fileref, da * sizeof (int), SEEK_SET); | |
| if ((f == FN_READ) && (err == 0)) { /* read? */ | |
| awc = fxread (&M[pa], sizeof (int32), wc, uptr->fileref); | |
| for ( ; awc < wc; awc++) | |
| M[pa + awc] = 0; | |
| err = ferror (uptr->fileref); | |
| } | |
| if ((f == FN_WRITE) && (err == 0)) { /* write? */ | |
| fxwrite (&M[pa], sizeof (int32), wc, uptr->fileref); | |
| err = ferror (uptr->fileref); | |
| if ((err == 0) && (i = (wc & (RP_NUMWD - 1)))) { | |
| fxwrite (fill, sizeof (int), i, uptr->fileref); | |
| err = ferror (uptr->fileref); | |
| } | |
| } | |
| if ((f == FN_WRCHK) && (err == 0)) { /* write check? */ | |
| for (i = 0; (err == 0) && (i < wc); i++) { | |
| awc = fxread (&comp, sizeof (int32), 1, uptr->fileref); | |
| if (awc == 0) | |
| comp = 0; | |
| if (comp != M[pa + i]) | |
| rp_updsta (0, STB_WCE); | |
| } | |
| err = ferror (uptr->fileref); | |
| } | |
| rp_wc = (rp_wc + wc) & DMASK; /* final word count */ | |
| rp_ma = (rp_ma + wc) & DMASK; /* final mem addr */ | |
| da = (da + wc + (RP_NUMWD - 1)) / RP_NUMWD; /* final sector num */ | |
| cyl = da / (RP_NUMSC * RP_NUMSF); /* get cyl */ | |
| if (cyl >= RP_NUMCY) | |
| cyl = RP_NUMCY - 1; | |
| surf = (da % (RP_NUMSC * RP_NUMSF)) / RP_NUMSC; /* get surface */ | |
| sect = (da % (RP_NUMSC * RP_NUMSF)) % RP_NUMSC; /* get sector */ | |
| rp_da = (cyl << DA_V_CYL) | (surf << DA_V_SURF) | (sect << DA_V_SECT); | |
| rp_busy = 0; /* clear busy */ | |
| rp_updsta (STA_DON, 0); /* set done */ | |
| if (err != 0) { /* error? */ | |
| perror ("RP I/O error"); | |
| clearerr (uptr->fileref); | |
| return IORETURN (rp_stopioe, SCPE_IOERR); | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Update status */ | |
| void rp_updsta (int32 newa, int32 newb) | |
| { | |
| int32 f; | |
| UNIT *uptr; | |
| uptr = rp_dev.units + GET_UNIT (rp_sta); | |
| rp_sta = (rp_sta & ~(STA_DYN | STA_ERR)) | newa; | |
| rp_stb = (rp_stb & ~STB_DYN) | newb; | |
| if (uptr->flags & UNIT_WPRT) | |
| rp_sta = rp_sta | STA_SUWP; | |
| if ((uptr->flags & UNIT_ATT) == 0) | |
| rp_stb = rp_stb | STB_SUFU | STB_SUNR; | |
| else if (sim_is_active (uptr)) { | |
| f = (uptr->FUNC) & STA_M_FUNC; | |
| if ((f == FN_SEEK) || (f == FN_RECAL)) | |
| rp_stb = rp_stb | STB_SUSU | STB_SUNR; | |
| } | |
| else if (uptr->CYL >= RP_NUMCY) | |
| rp_sta = rp_sta | STA_SUSI; | |
| if ((rp_sta & STA_EFLGS) || (rp_stb & STB_EFLGS)) | |
| rp_sta = rp_sta | STA_ERR; | |
| if (((rp_sta & (STA_ERR | STA_DON)) && (rp_sta & STA_IED)) || | |
| ((rp_stb & STB_ATTN) && (rp_sta & STA_IEA))) | |
| SET_INT (RP); | |
| else CLR_INT (RP); | |
| return; | |
| } | |
| /* Reset routine */ | |
| t_stat rp_reset (DEVICE *dptr) | |
| { | |
| int32 i; | |
| UNIT *uptr; | |
| rp_sta = rp_stb = rp_da = rp_wc = rp_ma = rp_busy = 0; | |
| CLR_INT (RP); | |
| for (i = 0; i < RP_NUMDR; i++) { | |
| uptr = rp_dev.units + i; | |
| sim_cancel (uptr); | |
| uptr->CYL = uptr->FUNC = 0; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* IORS routine */ | |
| int32 rp_iors (void) | |
| { | |
| return ((rp_sta & (STA_ERR | STA_DON)) || (rp_stb & STB_ATTN))? IOS_RP: 0; | |
| } | |
| /* Attach unit */ | |
| t_stat rp_attach (UNIT *uptr, char *cptr) | |
| { | |
| t_stat reason; | |
| reason = attach_unit (uptr, cptr); | |
| rp_updsta (0, 0); | |
| return reason; | |
| } | |
| /* Detach unit */ | |
| t_stat rp_detach (UNIT *uptr) | |
| { | |
| t_stat reason; | |
| reason = detach_unit (uptr); | |
| rp_updsta (0, 0); | |
| return reason; | |
| } |