| /* pdp11_rk.c: RK11/RKV11 cartridge disk simulator | |
| Copyright (c) 1993-2009, 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. | |
| rk RK11/RKV11/RK05 cartridge disk | |
| 23-Oct-13 RMS Revised for new boot setup routine | |
| 20-Mar-09 RMS Fixed bug in read header (Walter F Mueller) | |
| 16-Aug-05 RMS Fixed C++ declaration and cast problems | |
| 07-Jul-05 RMS Removed extraneous externs | |
| 30-Sep-04 RMS Revised Unibus interface | |
| 24-Jan-04 RMS Added increment inhibit, overrun detection, formatting | |
| 29-Dec-03 RMS Added RKV11 support | |
| 29-Sep-02 RMS Added variable address support to bootstrap | |
| Added vector change/display support | |
| Revised mapping mnemonics | |
| New data structures | |
| 26-Jan-02 RMS Revised bootstrap to conform to M9312 | |
| 06-Jan-02 RMS Revised enable/disable support | |
| 30-Nov-01 RMS Added read only unit, extended SET/SHOW support | |
| 24-Nov-01 RMS Converted FLG to array | |
| 09-Nov-01 RMS Added bus map support | |
| 07-Sep-01 RMS Revised device disable and interrupt mechanisms | |
| 26-Apr-01 RMS Added device enable/disable support | |
| 25-Mar-01 RMS Fixed block fill calculation | |
| 15-Feb-01 RMS Corrected bootstrap string | |
| 29-Jun-96 RMS Added unit disable support | |
| The RK11 is an eight drive cartridge disk subsystem. An RK05 drive | |
| consists of 203 cylinders, each with 2 surfaces containing 12 sectors | |
| of 512 bytes. | |
| The most complicated part of the RK11 controller is the concept of | |
| interrupt "polling". While only one read or write can occur at a | |
| time, the controller supports multiple seeks. When a seek completes, | |
| if done is set the drive attempts to interrupt. If an interrupt is | |
| already pending, the interrupt is "queued" until it can be processed. | |
| When an interrupt occurs, RKDS<15:13> is loaded with the number of the | |
| interrupting drive. | |
| To implement this structure, and to assure that read/write interrupts | |
| take priority over seek interrupts, the controller contains an | |
| interrupt queue, rkintq, with a bit for a controller interrupt and | |
| then one for each drive. In addition, the drive number of the last | |
| non-seeking drive is recorded in last_drv. | |
| */ | |
| #if defined (VM_VAX) /* VAX version */ | |
| #include "vax_defs.h" | |
| extern int32 int_req[IPL_HLVL]; | |
| #define DMASK 0xFFFF | |
| #define RK_DIS DEV_DIS | |
| #else /* PDP-11 version */ | |
| #include "pdp11_defs.h" | |
| extern int32 int_req[IPL_HLVL]; | |
| #define RK_DIS 0 | |
| #endif | |
| /* Constants */ | |
| #define RK_NUMWD 256 /* words/sector */ | |
| #define RK_NUMSC 12 /* sectors/surface */ | |
| #define RK_NUMSF 2 /* surfaces/cylinder */ | |
| #define RK_NUMCY 203 /* cylinders/drive */ | |
| #define RK_NUMTR (RK_NUMCY * RK_NUMSF) /* tracks/drive */ | |
| #define RK_NUMDR 8 /* drives/controller */ | |
| #define RK_M_NUMDR 07 | |
| #define RK_SIZE (RK_NUMCY * RK_NUMSF * RK_NUMSC * RK_NUMWD) | |
| /* words/drive */ | |
| #define RK_CTLI 1 /* controller int */ | |
| #define RK_SCPI(x) (2u << (x)) /* drive int */ | |
| #define RK_MAXFR (1 << 16) /* max transfer */ | |
| /* Flags in the unit flags word */ | |
| #define UNIT_V_HWLK (UNIT_V_UF + 0) /* hwre write lock */ | |
| #define UNIT_V_SWLK (UNIT_V_UF + 1) /* swre write lock */ | |
| #define UNIT_HWLK (1u << UNIT_V_HWLK) | |
| #define UNIT_SWLK (1u << UNIT_V_SWLK) | |
| #define UNIT_WPRT (UNIT_HWLK|UNIT_SWLK|UNIT_RO) /* write prot */ | |
| /* Parameters in the unit descriptor */ | |
| #define CYL u3 /* current cylinder */ | |
| #define FUNC u4 /* function */ | |
| /* RKDS */ | |
| BITFIELD rk_ds_bits[] = { | |
| #define RKDS_SC 0000017 /* sector counter */ | |
| BITF(SC,4), | |
| #define RKDS_ON_SC 0000020 /* on sector */ | |
| BIT(ON_SC), | |
| #define RKDS_WLK 0000040 /* write locked */ | |
| BIT(WLK), | |
| #define RKDS_RWS 0000100 /* rd/wr/seek ready */ | |
| BIT(RWS), | |
| #define RKDS_RDY 0000200 /* drive ready */ | |
| BIT(RDY), | |
| #define RKDS_SC_OK 0000400 /* SC valid */ | |
| BIT(SC_OK), | |
| #define RKDS_INC 0001000 /* seek incomplete */ | |
| BIT(INC), | |
| #define RKDS_UNSAFE 0002000 /* unsafe */ | |
| BIT(UNSAFE), | |
| #define RKDS_RK05 0004000 /* RK05 */ | |
| BIT(RK05), | |
| #define RKDS_PWR 0010000 /* power low */ | |
| BIT(PWR), | |
| #define RKDS_ID 0160000 /* drive ID */ | |
| #define RKDS_V_ID 13 | |
| BITF(ID,3), | |
| ENDBITS | |
| }; | |
| /* RKER */ | |
| BITFIELD rk_er_bits[] = { | |
| #define RKER_WCE 0000001 /* write check */ | |
| BIT(WCE), | |
| #define RKER_CSE 0000002 /* checksum */ | |
| BIT(CSE), | |
| #define RKER_NXS 0000040 /* nx sector */ | |
| BIT(NXS), | |
| #define RKER_NXC 0000100 /* nx cylinder */ | |
| BIT(NXC), | |
| #define RKER_NXD 0000200 /* nx drive */ | |
| BIT(NXD), | |
| #define RKER_TE 0000400 /* timing error */ | |
| BIT(TE), | |
| #define RKER_DLT 0001000 /* data late */ | |
| BIT(DLT), | |
| #define RKER_NXM 0002000 /* nx memory */ | |
| BIT(NXM), | |
| #define RKER_PGE 0004000 /* programming error */ | |
| BIT(PGE), | |
| #define RKER_SKE 0010000 /* seek error */ | |
| BIT(SKE), | |
| #define RKER_WLK 0020000 /* write lock */ | |
| BIT(WLK), | |
| #define RKER_OVR 0040000 /* overrun */ | |
| BIT(OVR), | |
| #define RKER_DRE 0100000 /* drive error */ | |
| BIT(DRE), | |
| #define RKER_IMP 0177743 /* implemented */ | |
| #define RKER_SOFT (RKER_WCE+RKER_CSE) /* soft errors */ | |
| #define RKER_HARD 0177740 /* hard errors */ | |
| ENDBITS | |
| }; | |
| /* RKCS */ | |
| static const char *rk_funcs[] = { | |
| "CTLRESET", "WRITE", "READ", "WCHK", "SEEK", "RCHK", "DRVRESET", "WLK"}; | |
| BITFIELD rk_cs_bits[] = { | |
| BIT(GO), | |
| #define RKCS_M_FUNC 0000007 /* function */ | |
| #define RKCS_CTLRESET 0 | |
| #define RKCS_WRITE 1 | |
| #define RKCS_READ 2 | |
| #define RKCS_WCHK 3 | |
| #define RKCS_SEEK 4 | |
| #define RKCS_RCHK 5 | |
| #define RKCS_DRVRESET 6 | |
| #define RKCS_WLK 7 | |
| #define RKCS_V_FUNC 1 | |
| BITFNAM(FUNC,3,rk_funcs), | |
| #define RKCS_MEX 0000060 /* memory extension */ | |
| #define RKCS_V_MEX 4 | |
| BITF(MEX,2), | |
| BIT(IE), | |
| BIT(DONE), | |
| #define RKCS_SSE 0000400 /* stop on soft err */ | |
| BIT(SSE), | |
| BITNC, | |
| #define RKCS_FMT 0002000 /* format */ | |
| BIT(FMT), | |
| #define RKCS_INH 0004000 /* inhibit increment */ | |
| BIT(INH), | |
| BITNC, | |
| #define RKCS_SCP 0020000 /* search complete */ | |
| BIT(SCP), | |
| #define RKCS_HERR 0040000 /* hard error */ | |
| BIT(HERR), | |
| #define RKCS_ERR 0100000 /* error */ | |
| BIT(ERR), | |
| #define RKCS_REAL 0026776 /* kept here */ | |
| #define RKCS_RW 0006576 /* read/write */ | |
| #define GET_FUNC(x) (((x) >> RKCS_V_FUNC) & RKCS_M_FUNC) | |
| ENDBITS | |
| }; | |
| /* RKDA */ | |
| BITFIELD rk_da_bits[] = { | |
| #define RKDA_V_SECT 0 /* sector */ | |
| #define RKDA_M_SECT 017 | |
| BITF(SECT,4), | |
| #define RKDA_V_TRACK 4 /* track */ | |
| #define RKDA_M_TRACK 0777 | |
| BITF(SURF,1), | |
| #define RKDA_V_CYL 5 /* cylinder */ | |
| #define RKDA_M_CYL 0377 | |
| BITF(CYL,8), | |
| #define RKDA_V_DRIVE 13 /* drive */ | |
| #define RKDA_M_DRIVE 07 | |
| #define RKDA_DRIVE (RKDA_M_DRIVE << RKDA_V_DRIVE) | |
| BITF(DRIVE,3), | |
| #define GET_SECT(x) (((x) >> RKDA_V_SECT) & RKDA_M_SECT) | |
| #define GET_CYL(x) (((x) >> RKDA_V_CYL) & RKDA_M_CYL) | |
| #define GET_TRACK(x) (((x) >> RKDA_V_TRACK) & RKDA_M_TRACK) | |
| #define GET_DRIVE(x) (((x) >> RKDA_V_DRIVE) & RKDA_M_DRIVE) | |
| #define GET_DA(x) ((GET_TRACK (x) * RK_NUMSC) + GET_SECT (x)) | |
| ENDBITS | |
| }; | |
| /* RKWC */ | |
| BITFIELD rk_wc_bits[] = { | |
| BITF(WC,16), | |
| ENDBITS | |
| }; | |
| /* RKBA */ | |
| BITFIELD rk_ba_bits[] = { | |
| #define RKBA_IMP 0177776 /* implemented */ | |
| BITF(BA,16), | |
| ENDBITS | |
| }; | |
| BITFIELD *rk_reg_bits[] = { | |
| rk_ds_bits, | |
| rk_er_bits, | |
| rk_cs_bits, | |
| rk_wc_bits, | |
| rk_ba_bits, | |
| rk_da_bits, | |
| NULL, | |
| NULL, | |
| }; | |
| /* Debug detail levels */ | |
| #define RKDEB_OPS 001 /* transactions */ | |
| #define RKDEB_RRD 002 /* reg reads */ | |
| #define RKDEB_RWR 004 /* reg writes */ | |
| #define RKDEB_TRC 010 /* trace */ | |
| #define RKDEB_INT 020 /* interrupts */ | |
| #define RK_MIN 10 | |
| #define MAX(x,y) (((x) > (y))? (x): (y)) | |
| uint16 *rkxb = NULL; /* xfer buffer */ | |
| int32 rkcs = 0; /* control/status */ | |
| int32 rkds = 0; /* drive status */ | |
| int32 rkba = 0; /* memory address */ | |
| int32 rkda = 0; /* disk address */ | |
| int32 rker = 0; /* error status */ | |
| int32 rkwc = 0; /* word count */ | |
| int32 rkintq = 0; /* interrupt queue */ | |
| int32 last_drv = 0; /* last r/w drive */ | |
| int32 rk_stopioe = 1; /* stop on error */ | |
| int32 rk_swait = 10; /* seek time */ | |
| int32 rk_rwait = 10; /* rotate time */ | |
| const char *rk_regnames[] = { | |
| "RKDS", | |
| "RKER", | |
| "RKCS", | |
| "RKWC", | |
| "RKBA", | |
| "RKDA", | |
| "unused", | |
| "RKDB", | |
| }; | |
| int32 *rk_regs[] = { | |
| &rkds, | |
| &rker, | |
| &rkcs, | |
| &rkwc, | |
| &rkba, | |
| &rkda, | |
| }; | |
| t_stat rk_rd (int32 *data, int32 PA, int32 access); | |
| t_stat rk_wr (int32 data, int32 PA, int32 access); | |
| int32 rk_inta (void); | |
| t_stat rk_svc (UNIT *uptr); | |
| t_stat rk_reset (DEVICE *dptr); | |
| void rk_go (void); | |
| void rk_set_done (int32 error); | |
| void rk_clr_done (void); | |
| t_stat rk_boot (int32 unitno, DEVICE *dptr); | |
| t_stat rk_help (FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr); | |
| const char *rk_description (DEVICE *dptr); | |
| DEBTAB rk_deb[] = { | |
| { "OPS", RKDEB_OPS }, | |
| { "RRD", RKDEB_RRD }, | |
| { "RWR", RKDEB_RWR }, | |
| { "INTERRUPT", RKDEB_INT }, | |
| { "TRACE", RKDEB_TRC }, | |
| { NULL, 0 } | |
| }; | |
| /* RK11 data structures | |
| rk_dev RK device descriptor | |
| rk_unit RK unit list | |
| rk_reg RK register list | |
| rk_mod RK modifier list | |
| */ | |
| #define IOLN_RK 020 | |
| DIB rk_dib = { | |
| IOBA_AUTO, IOLN_RK, &rk_rd, &rk_wr, | |
| 1, IVCL (RK), VEC_AUTO, { &rk_inta }, IOLN_RK, | |
| }; | |
| UNIT rk_unit[] = { | |
| { UDATA (&rk_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE+ | |
| UNIT_ROABLE, RK_SIZE) }, | |
| { UDATA (&rk_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE+ | |
| UNIT_ROABLE, RK_SIZE) }, | |
| { UDATA (&rk_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE+ | |
| UNIT_ROABLE, RK_SIZE) }, | |
| { UDATA (&rk_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE+ | |
| UNIT_ROABLE, RK_SIZE) }, | |
| { UDATA (&rk_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE+ | |
| UNIT_ROABLE, RK_SIZE) }, | |
| { UDATA (&rk_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE+ | |
| UNIT_ROABLE, RK_SIZE) }, | |
| { UDATA (&rk_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE+ | |
| UNIT_ROABLE, RK_SIZE) }, | |
| { UDATA (&rk_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_DISABLE+ | |
| UNIT_ROABLE, RK_SIZE) } | |
| }; | |
| REG rk_reg[] = { | |
| { ORDATADF (RKCS, rkcs, 16, "control/status", rk_cs_bits) }, | |
| { ORDATADF (RKDA, rkda, 16, "disk address", rk_da_bits) }, | |
| { ORDATADF (RKBA, rkba, 16, "memory address", rk_ba_bits) }, | |
| { ORDATADF (RKWC, rkwc, 16, "word count", rk_wc_bits) }, | |
| { ORDATADF (RKDS, rkds, 16, "drive status", rk_ds_bits) }, | |
| { ORDATADF (RKER, rker, 16, "error status", rk_er_bits) }, | |
| { ORDATAD (INTQ, rkintq, 9, "interrupt queue") }, | |
| { ORDATAD (DRVN, last_drv, 3, "last r/w drive") }, | |
| { FLDATAD (INT, IREQ (RK), INT_V_RK, "interrupt pending flag") }, | |
| { FLDATAD (ERR, rkcs, CSR_V_ERR, "error flag (CSR<15>)") }, | |
| { FLDATAD (DONE, rkcs, CSR_V_DONE, "device done flag (CSR<7>)") }, | |
| { FLDATAD (IE, rkcs, CSR_V_IE, "interrupt enable flag (CSR<6>)") }, | |
| { DRDATAD (STIME, rk_swait, 24, "seek time, per cylinder"), PV_LEFT }, | |
| { DRDATAD (RTIME, rk_rwait, 24, "rotational delay"), PV_LEFT }, | |
| { FLDATAD (STOP_IOE, rk_stopioe, 0, "stop on I/O error flag") }, | |
| { ORDATA (DEVADDR, rk_dib.ba, 32), REG_HRO }, | |
| { ORDATA (DEVVEC, rk_dib.vec, 16), REG_HRO }, | |
| { NULL } | |
| }; | |
| MTAB rk_mod[] = { | |
| { UNIT_HWLK, 0, "write enabled", "WRITEENABLED", | |
| NULL, NULL, NULL, "Write enable disk drive" }, | |
| { UNIT_HWLK, UNIT_HWLK, "write locked", "LOCKED", | |
| NULL, NULL, NULL, "Write lock disk drive" }, | |
| { MTAB_XTD|MTAB_VDV|MTAB_VALR, 010, "ADDRESS", "ADDRESS", | |
| &set_addr, &show_addr, NULL, "Bus address" }, | |
| { MTAB_XTD|MTAB_VDV|MTAB_VALR, 0, "VECTOR", "VECTOR", | |
| &set_vec, &show_vec, NULL, "Interrupt vector" }, | |
| { 0 } | |
| }; | |
| DEVICE rk_dev = { | |
| "RK", rk_unit, rk_reg, rk_mod, | |
| RK_NUMDR, 8, 24, 1, 8, 16, | |
| NULL, NULL, &rk_reset, | |
| &rk_boot, NULL, NULL, | |
| &rk_dib, DEV_DISABLE | DEV_UBUS | DEV_Q18 | DEV_DEBUG | RK_DIS, 0, | |
| rk_deb, NULL, NULL, &rk_help, NULL, NULL, | |
| &rk_description | |
| }; | |
| /* I/O dispatch routine, I/O addresses 17777400 - 17777416 | |
| 17777400 RKDS read only, constructed from "id'd drive" | |
| plus current drive status flags | |
| 17777402 RKER read only, set as operations progress, | |
| cleared by INIT or CONTROL RESET | |
| 17777404 RKCS read/write | |
| 17777406 RKWC read/write | |
| 17777410 RKBA read/write | |
| 17777412 RKDA read/write | |
| 17777414 RKMR read/write, unimplemented | |
| 17777416 RKDB read only, unimplemented | |
| */ | |
| t_stat rk_rd (int32 *data, int32 PA, int32 access) | |
| { | |
| UNIT *uptr; | |
| switch ((PA >> 1) & 07) { /* decode PA<3:1> */ | |
| case 0: /* RKDS: read only */ | |
| rkds = rkds & RKDS_ID; /* identified unit */ | |
| uptr = rk_dev.units + GET_DRIVE (rkda); /* selected unit */ | |
| if (!(uptr->flags & UNIT_DIS)) { /* not disabled? */ | |
| rkds = rkds | RKDS_RK05 | RKDS_SC_OK | /* random sector */ | |
| (rand () % RK_NUMSC); | |
| if (uptr->flags & UNIT_ATT) /* attached? */ | |
| rkds = rkds | RKDS_RDY; | |
| if (!sim_is_active (uptr)) /* idle? */ | |
| rkds = rkds | RKDS_RWS; | |
| if (uptr->flags & UNIT_WPRT) /* write locked? */ | |
| rkds = rkds | RKDS_WLK; | |
| if (GET_SECT (rkda) == (rkds & RKDS_SC)) | |
| rkds = rkds | RKDS_ON_SC; | |
| } | |
| *data = rkds; | |
| break; | |
| case 1: /* RKER: read only */ | |
| *data = rker & RKER_IMP; | |
| break; | |
| case 2: /* RKCS */ | |
| rkcs = rkcs & RKCS_REAL; | |
| if (rker) /* update err flags */ | |
| rkcs = rkcs | RKCS_ERR; | |
| if (rker & RKER_HARD) | |
| rkcs = rkcs | RKCS_HERR; | |
| *data = rkcs; | |
| break; | |
| case 3: /* RKWC */ | |
| *data = rkwc; | |
| break; | |
| case 4: /* RKBA */ | |
| *data = rkba & RKBA_IMP; | |
| break; | |
| case 5: /* RKDA */ | |
| *data = rkda; | |
| break; | |
| default: | |
| *data = 0; | |
| return SCPE_OK; | |
| } /* end switch */ | |
| sim_debug (RKDEB_RRD, &rk_dev, ">>RK read: %s=0%o\n", rk_regnames[(PA >> 1) & 07], *data); | |
| sim_debug_bits (RKDEB_RRD, &rk_dev, rk_reg_bits[(PA >> 1) & 07], *data, *data, 1); | |
| return SCPE_OK; | |
| } | |
| t_stat rk_wr (int32 data, int32 PA, int32 access) | |
| { | |
| int32 old_val = *rk_regs[(PA >> 1) & 07]; | |
| switch ((PA >> 1) & 07) { /* decode PA<3:1> */ | |
| case 0: /* RKDS: read only */ | |
| break; | |
| case 1: /* RKER: read only */ | |
| break; | |
| case 2: /* RKCS */ | |
| rkcs = rkcs & RKCS_REAL; | |
| if (access == WRITEB) | |
| data = (PA & 1)? (rkcs & 0377) | (data << 8): (rkcs & ~0377) | data; | |
| if ((data & CSR_IE) == 0) { /* int disable? */ | |
| rkintq = 0; /* clr int queue */ | |
| sim_debug (RKDEB_INT, &rk_dev, "rk_wr(CLR_INT)\n"); | |
| CLR_INT (RK); /* clr int request */ | |
| } | |
| else if ((rkcs & (CSR_DONE + CSR_IE)) == CSR_DONE) { | |
| rkintq = rkintq | RK_CTLI; /* queue ctrl int */ | |
| sim_debug (RKDEB_INT, &rk_dev, "rk_wr(SET_INT)\n"); | |
| SET_INT (RK); /* set int request */ | |
| } | |
| rkcs = (rkcs & ~RKCS_RW) | (data & RKCS_RW); | |
| if ((rkcs & CSR_DONE) && (data & CSR_GO)) /* new function? */ | |
| rk_go (); | |
| break; | |
| case 3: /* RKWC */ | |
| if (access == WRITEB) | |
| data = (PA & 1)? (rkwc & 0377) | (data << 8): (rkwc & ~0377) | data; | |
| rkwc = data; | |
| break; | |
| case 4: /* RKBA */ | |
| if (access == WRITEB) | |
| data = (PA & 1)? (rkba & 0377) | (data << 8): (rkba & ~0377) | data; | |
| rkba = data & RKBA_IMP; | |
| break; | |
| case 5: /* RKDA */ | |
| if ((rkcs & CSR_DONE) == 0) | |
| return SCPE_OK; | |
| if (access == WRITEB) | |
| data = (PA & 1)? (rkda & 0377) | (data << 8): (rkda & ~0377) | data; | |
| rkda = data; | |
| break; | |
| default: | |
| return SCPE_OK; | |
| } /* end switch */ | |
| sim_debug (RKDEB_RWR, &rk_dev, ">>RK write: %s=0%o\n", rk_regnames[(PA >> 1) & 07], data); | |
| sim_debug_bits (RKDEB_RWR, &rk_dev, rk_reg_bits[(PA >> 1) & 07], old_val, *rk_regs[(PA >> 1) & 07], 1); | |
| return SCPE_OK; | |
| } | |
| /* Initiate new function */ | |
| void rk_go (void) | |
| { | |
| int32 i, sect, cyl, func; | |
| UNIT *uptr; | |
| func = GET_FUNC (rkcs); /* get function */ | |
| if (func == RKCS_CTLRESET) { /* control reset? */ | |
| rker = 0; /* clear errors */ | |
| rkda = 0; | |
| rkba = 0; | |
| rkcs = CSR_DONE; | |
| rkintq = 0; /* clr int queue */ | |
| sim_debug (RKDEB_INT, &rk_dev, "rk_go(CLR_INT)\n"); | |
| CLR_INT (RK); /* clr int request */ | |
| return; | |
| } | |
| rker = rker & ~RKER_SOFT; /* clear soft errors */ | |
| if (rker == 0) /* redo summary */ | |
| rkcs = rkcs & ~RKCS_ERR; | |
| rkcs = rkcs & ~RKCS_SCP; /* clear sch compl*/ | |
| rk_clr_done (); /* clear done */ | |
| last_drv = GET_DRIVE (rkda); /* get drive no */ | |
| uptr = rk_dev.units + last_drv; /* select unit */ | |
| if (uptr->flags & UNIT_DIS) { /* not present? */ | |
| rk_set_done (RKER_NXD); | |
| return; | |
| } | |
| if (((uptr->flags & UNIT_ATT) == 0) || /* not att or busy? */ | |
| sim_is_active (uptr)) { | |
| rk_set_done (RKER_DRE); | |
| return; | |
| } | |
| if ((rkcs & RKCS_FMT) && /* format and */ | |
| (func != RKCS_READ) && (func != RKCS_WRITE)) { /* not read or write? */ | |
| rk_set_done (RKER_PGE); | |
| return; | |
| } | |
| if ((func == RKCS_WRITE) && /* write and locked? */ | |
| (uptr->flags & UNIT_WPRT)) { | |
| rk_set_done (RKER_WLK); | |
| return; | |
| } | |
| if (func == RKCS_WLK) { /* write lock? */ | |
| uptr->flags = uptr->flags | UNIT_SWLK; | |
| rk_set_done (0); | |
| return; | |
| } | |
| if (func == RKCS_DRVRESET) { /* drive reset? */ | |
| uptr->flags = uptr->flags & ~UNIT_SWLK; | |
| cyl = sect = 0; | |
| func = RKCS_SEEK; | |
| } | |
| else { | |
| sect = GET_SECT (rkda); | |
| cyl = GET_CYL (rkda); | |
| } | |
| if (sect >= RK_NUMSC) { /* bad sector? */ | |
| rk_set_done (RKER_NXS); | |
| return; | |
| } | |
| if (cyl >= RK_NUMCY) { /* bad cyl? */ | |
| rk_set_done (RKER_NXC); | |
| return; | |
| } | |
| i = abs (cyl - uptr->CYL) * rk_swait; /* seek time */ | |
| if (func == RKCS_SEEK) { /* seek? */ | |
| rk_set_done (0); /* set done */ | |
| sim_activate (uptr, MAX (RK_MIN, i)); /* schedule */ | |
| } | |
| else sim_activate (uptr, i + rk_rwait); | |
| uptr->FUNC = func; /* save func */ | |
| uptr->CYL = cyl; /* put on cylinder */ | |
| return; | |
| } | |
| /* Service unit timeout | |
| If seek in progress, complete seek command | |
| Else complete data transfer command | |
| The unit control block contains the function and disk address for | |
| the current command. | |
| */ | |
| t_stat rk_svc (UNIT *uptr) | |
| { | |
| int32 i, drv, err, awc, wc, cma, cda, t; | |
| int32 da, cyl, track, sect; | |
| uint32 ma; | |
| uint16 comp; | |
| drv = (int32) (uptr - rk_dev.units); /* get drv number */ | |
| if (uptr->FUNC == RKCS_SEEK) { /* seek */ | |
| rkcs = rkcs | RKCS_SCP; /* set seek done */ | |
| if (rkcs & CSR_IE) { /* ints enabled? */ | |
| rkintq = rkintq | RK_SCPI (drv); /* queue request */ | |
| if (rkcs & CSR_DONE) { | |
| sim_debug (RKDEB_INT, &rk_dev, "rk_svc(SET_INT)\n"); | |
| SET_INT (RK); | |
| } | |
| } | |
| else { | |
| rkintq = 0; /* clear queue */ | |
| sim_debug (RKDEB_INT, &rk_dev, "rk_svc(CLR_INT)\n"); | |
| CLR_INT (RK); /* clear interrupt */ | |
| } | |
| return SCPE_OK; | |
| } | |
| if ((uptr->flags & UNIT_ATT) == 0) { /* attached? */ | |
| rk_set_done (RKER_DRE); | |
| return IORETURN (rk_stopioe, SCPE_UNATT); | |
| } | |
| sect = GET_SECT (rkda); /* get sector, cyl */ | |
| cyl = GET_CYL (rkda); | |
| if (sect >= RK_NUMSC) { /* bad sector? */ | |
| rk_set_done (RKER_NXS); | |
| return SCPE_OK; | |
| } | |
| if (cyl >= RK_NUMCY) { /* bad cyl? */ | |
| rk_set_done (RKER_NXC); | |
| return SCPE_OK; | |
| } | |
| ma = ((rkcs & RKCS_MEX) << (16 - RKCS_V_MEX)) | rkba; /* get mem addr */ | |
| da = GET_DA (rkda) * RK_NUMWD; /* get disk addr */ | |
| wc = 0200000 - rkwc; /* get wd cnt */ | |
| if ((da + wc) > (int32) uptr->capac) { /* overrun? */ | |
| wc = (int32)uptr->capac - da; /* trim transfer */ | |
| rker = rker | RKER_OVR; /* set overrun err */ | |
| } | |
| err = fseek (uptr->fileref, da * sizeof (int16), SEEK_SET); | |
| if (wc && (err == 0)) { /* seek ok? */ | |
| switch (uptr->FUNC) { /* case on function */ | |
| case RKCS_READ: /* read */ | |
| if (rkcs & RKCS_FMT) { /* format? */ | |
| for (i = 0, cda = da; i < wc; i++) { /* fill buffer with cyl #s */ | |
| if (cda >= (int32) uptr->capac) { /* overrun? */ | |
| rker = rker | RKER_OVR; /* set overrun err */ | |
| wc = i; /* trim transfer */ | |
| break; | |
| } | |
| rkxb[i] = (uint16)(((cda / RK_NUMWD) / (RK_NUMSF * RK_NUMSC)) << RKDA_V_CYL); | |
| cda = cda + RK_NUMWD; /* next sector */ | |
| } /* end for wc */ | |
| } /* end if format */ | |
| else { /* normal read */ | |
| i = fxread (rkxb, sizeof (int16), wc, uptr->fileref); | |
| err = ferror (uptr->fileref); /* read file */ | |
| for ( ; i < wc; i++) /* fill buf */ | |
| rkxb[i] = 0; | |
| } | |
| if (rkcs & RKCS_INH) { /* incr inhibit? */ | |
| if ((t = Map_WriteW (ma, 2, &rkxb[wc - 1]))) {/* store last */ | |
| rker = rker | RKER_NXM; /* NXM? set flag */ | |
| wc = 0; /* no transfer */ | |
| } | |
| } | |
| else { /* normal store */ | |
| if ((t = Map_WriteW (ma, wc << 1, rkxb))) { /* store buf */ | |
| rker = rker | RKER_NXM; /* NXM? set flag */ | |
| wc = wc - t; /* adj wd cnt */ | |
| } | |
| } | |
| break; /* end read */ | |
| case RKCS_WRITE: /* write */ | |
| if (rkcs & RKCS_INH) { /* incr inhibit? */ | |
| if ((t = Map_ReadW (ma, 2, &comp))) { /* get 1st word */ | |
| rker = rker | RKER_NXM; /* NXM? set flag */ | |
| wc = 0; /* no transfer */ | |
| } | |
| for (i = 0; i < wc; i++) /* all words same */ | |
| rkxb[i] = comp; | |
| } | |
| else { /* normal fetch */ | |
| if ((t = Map_ReadW (ma, wc << 1, rkxb))) { /* get buf */ | |
| rker = rker | RKER_NXM; /* NXM? set flg */ | |
| wc = wc - t; /* adj wd cnt */ | |
| } | |
| } | |
| if (wc) { /* any xfer? */ | |
| awc = (wc + (RK_NUMWD - 1)) & ~(RK_NUMWD - 1); /* clr to */ | |
| for (i = wc; i < awc; i++) /* end of blk */ | |
| rkxb[i] = 0; | |
| fxwrite (rkxb, sizeof (int16), awc, uptr->fileref); | |
| err = ferror (uptr->fileref); | |
| } | |
| break; /* end write */ | |
| case RKCS_WCHK: /* write check */ | |
| i = fxread (rkxb, sizeof (int16), wc, uptr->fileref); | |
| if ((err = ferror (uptr->fileref))) { /* read error? */ | |
| wc = 0; /* no transfer */ | |
| break; | |
| } | |
| for ( ; i < wc; i++) /* fill buf */ | |
| rkxb[i] = 0; | |
| awc = wc; /* save wc */ | |
| for (wc = 0, cma = ma; wc < awc; wc++) { /* loop thru buf */ | |
| if (Map_ReadW (cma, 2, &comp)) { /* mem wd */ | |
| rker = rker | RKER_NXM; /* NXM? set flg */ | |
| break; | |
| } | |
| if (comp != rkxb[wc]) { /* match to disk? */ | |
| rker = rker | RKER_WCE; /* no, err */ | |
| if (rkcs & RKCS_SSE) | |
| break; | |
| } | |
| if (!(rkcs & RKCS_INH)) /* next mem addr */ | |
| cma = cma + 2; | |
| } /* end for */ | |
| break; /* end wcheck */ | |
| default: /* read check */ | |
| break; | |
| } /* end switch */ | |
| } /* end else */ | |
| rkwc = (rkwc + wc) & 0177777; /* final word count */ | |
| if (!(rkcs & RKCS_INH)) /* final byte addr */ | |
| ma = ma + (wc << 1); | |
| rkba = ma & RKBA_IMP; /* lower 16b */ | |
| rkcs = (rkcs & ~RKCS_MEX) | ((ma >> (16 - RKCS_V_MEX)) & RKCS_MEX); | |
| if ((uptr->FUNC == RKCS_READ) && (rkcs & RKCS_FMT)) /* read format? */ | |
| da = da + (wc * RK_NUMWD); /* count by sectors */ | |
| else da = da + wc + (RK_NUMWD - 1); /* count by words */ | |
| track = (da / RK_NUMWD) / RK_NUMSC; | |
| sect = (da / RK_NUMWD) % RK_NUMSC; | |
| rkda = (rkda & RKDA_DRIVE) | (track << RKDA_V_TRACK) | (sect << RKDA_V_SECT); | |
| rk_set_done (0); | |
| if (err != 0) { /* error? */ | |
| sim_perror ("RK I/O error"); | |
| clearerr (uptr->fileref); | |
| return SCPE_IOERR; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Interrupt state change routines | |
| rk_set_done set done and possibly errors | |
| rk_clr_done clear done | |
| rk_inta acknowledge intererupt | |
| */ | |
| void rk_set_done (int32 error) | |
| { | |
| rkcs = rkcs | CSR_DONE; /* set done */ | |
| if (error != 0) { | |
| rker = rker | error; /* update error */ | |
| if (rker) /* update err flags */ | |
| rkcs = rkcs | RKCS_ERR; | |
| if (rker & RKER_HARD) | |
| rkcs = rkcs | RKCS_HERR; | |
| } | |
| if (rkcs & CSR_IE) { /* int enable? */ | |
| rkintq = rkintq | RK_CTLI; /* set ctrl int */ | |
| sim_debug (RKDEB_INT, &rk_dev, "rk_set_done(SET_INT)\n"); | |
| SET_INT (RK); /* request int */ | |
| } | |
| else { | |
| rkintq = 0; /* clear queue */ | |
| sim_debug (RKDEB_INT, &rk_dev, "rk_set_done(CLR_INT)\n"); | |
| CLR_INT (RK); | |
| } | |
| return; | |
| } | |
| void rk_clr_done (void) | |
| { | |
| rkcs = rkcs & ~CSR_DONE; /* clear done */ | |
| rkintq = rkintq & ~RK_CTLI; /* clear ctl int */ | |
| sim_debug (RKDEB_INT, &rk_dev, "rk_clr_done(CLR_INT)\n"); | |
| CLR_INT (RK); /* clear int req */ | |
| return; | |
| } | |
| int32 rk_inta (void) | |
| { | |
| int32 i; | |
| for (i = 0; i <= RK_NUMDR; i++) { /* loop thru intq */ | |
| if (rkintq & (1u << i)) { /* bit i set? */ | |
| rkintq = rkintq & ~(1u << i); /* clear bit i */ | |
| if (rkintq) { /* queue next */ | |
| sim_debug (RKDEB_INT, &rk_dev, "rk_inta(SET_INT)\n"); | |
| SET_INT (RK); | |
| } | |
| rkds = (rkds & ~RKDS_ID) | /* id drive */ | |
| (((i == 0)? last_drv: i - 1) << RKDS_V_ID); | |
| sim_debug (RKDEB_INT, &rk_dev, "rk_inta(vec=0%o)\n", rk_dib.vec); | |
| return rk_dib.vec; /* return vector */ | |
| } | |
| } | |
| rkintq = 0; /* clear queue */ | |
| return 0; /* passive release */ | |
| } | |
| /* Device reset */ | |
| t_stat rk_reset (DEVICE *dptr) | |
| { | |
| int32 i; | |
| UNIT *uptr; | |
| rkcs = CSR_DONE; | |
| rkda = rkba = rker = rkds = 0; | |
| rkintq = last_drv = 0; | |
| sim_debug (RKDEB_INT, &rk_dev, "rk_reset(CLR_INT)\n"); | |
| CLR_INT (RK); | |
| for (i = 0; i < RK_NUMDR; i++) { | |
| uptr = rk_dev.units + i; | |
| sim_cancel (uptr); | |
| uptr->CYL = uptr->FUNC = 0; | |
| uptr->flags = uptr->flags & ~UNIT_SWLK; | |
| } | |
| if (rkxb == NULL) | |
| rkxb = (uint16 *) calloc (RK_MAXFR, sizeof (uint16)); | |
| if (rkxb == NULL) | |
| return SCPE_MEM; | |
| return auto_config (0, 0); | |
| } | |
| /* Device bootstrap */ | |
| #if defined (VM_PDP11) | |
| #define BOOT_START 02000 /* start */ | |
| #define BOOT_ENTRY (BOOT_START + 002) /* entry */ | |
| #define BOOT_UNIT (BOOT_START + 010) /* unit number */ | |
| #define BOOT_CSR (BOOT_START + 032) /* CSR */ | |
| #define BOOT_LEN (sizeof (boot_rom) / sizeof (int16)) | |
| static const uint16 boot_rom[] = { | |
| 0042113, /* "KD" */ | |
| 0012706, BOOT_START, /* MOV #boot_start, SP */ | |
| 0012700, 0000000, /* MOV #unit, R0 ; unit number */ | |
| 0010003, /* MOV R0, R3 */ | |
| 0000303, /* SWAB R3 */ | |
| 0006303, /* ASL R3 */ | |
| 0006303, /* ASL R3 */ | |
| 0006303, /* ASL R3 */ | |
| 0006303, /* ASL R3 */ | |
| 0006303, /* ASL R3 */ | |
| 0012701, 0177412, /* MOV #RKDA, R1 ; csr */ | |
| 0010311, /* MOV R3, (R1) ; load da */ | |
| 0005041, /* CLR -(R1) ; clear ba */ | |
| 0012741, 0177000, /* MOV #-256.*2, -(R1) ; load wc */ | |
| 0012741, 0000005, /* MOV #READ+GO, -(R1) ; read & go */ | |
| 0005002, /* CLR R2 */ | |
| 0005003, /* CLR R3 */ | |
| 0012704, BOOT_START+020, /* MOV #START+20, R4 */ | |
| 0005005, /* CLR R5 */ | |
| 0105711, /* TSTB (R1) */ | |
| 0100376, /* BPL .-2 */ | |
| 0105011, /* CLRB (R1) */ | |
| 0005007 /* CLR PC */ | |
| }; | |
| t_stat rk_boot (int32 unitno, DEVICE *dptr) | |
| { | |
| size_t i; | |
| extern uint16 *M; /* memory */ | |
| for (i = 0; i < BOOT_LEN; i++) | |
| M[(BOOT_START >> 1) + i] = boot_rom[i]; | |
| M[BOOT_UNIT >> 1] = unitno & RK_M_NUMDR; | |
| M[BOOT_CSR >> 1] = (rk_dib.ba & DMASK) + 012; | |
| cpu_set_boot (BOOT_ENTRY); | |
| return SCPE_OK; | |
| } | |
| #else | |
| t_stat rk_boot (int32 unitno, DEVICE *dptr) | |
| { | |
| return SCPE_NOFNC; | |
| } | |
| #endif | |
| t_stat rk_help (FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr) | |
| { | |
| const char *const text = | |
| /*567901234567890123456789012345678901234567890123456789012345678901234567890*/ | |
| " RK11/RKV11 cartridge disk (RK05) controller (RK)\n" | |
| "\n" | |
| " This simulation only simulates the RK05 disk drive.\n" | |
| " After 1973, you couldn't have an RK02 in a system. Except for an early\n" | |
| " version of DOS11, no PDP11 operating system supported it.\n" | |
| "\n" | |
| " DEC did two versions of the RK11 controller for the PDP11: the RK11-C and\n" | |
| " the RK11-D (There's also a -E for the PDP-15.). The -C is described in\n" | |
| " the 1972 PDP11 Peripherals handbook. In that controller, RKDS<11>\n" | |
| " distinguishes an RK02 (low density, 128 words/sector) drive from an RK03\n" | |
| " (high density, 256 words/drive).\n" | |
| "\n" | |
| " By 1973, the RK11-C had been superseded by the RK11-D. The RK11-D only\n" | |
| " supports high density drives: the RK03 Diablo drive, and the RK05 DEC\n" | |
| " drive. In the RK11-D, RKDS<11> distinguishes between an RK03 (Diablo)\n" | |
| " and an RK05 (DEC) drive.\n" | |
| /*567901234567890123456789012345678901234567890123456789012345678901234567890*/ | |
| "\n" | |
| " From the point of view of software, the RK03/RK05 distinction is cosmetic.\n" | |
| " At the hardware level, RK05s had to be daisy-chained in front of RK03s,\n" | |
| " because RK03s did not receive/propagate the power fail signals. Daisy-chain\n" | |
| " order is different than unit-number order and cannot be detected from\n" | |
| " software.\n" | |
| "\n" | |
| " There is no known way to test an RK11-C, as none of the existing software\n" | |
| " sets support it. RT, RSTS/E, and M/M+ were all released after the RK11-D\n" | |
| " and do not support the RK11-C.\n" | |
| "\n" | |
| " Options include the ability to set units write enabled or write locked.\n"; | |
| fprintf (st, "%s", text); | |
| fprint_set_help (st, dptr); | |
| fprint_show_help (st, dptr); | |
| fprintf (st, "\nThe RK11 supports the BOOT command. The RK11 is disabled in a Qbus\n"); | |
| fprintf (st, "system with more than 256KB of memory.\n"); | |
| fprint_reg_help (st, dptr); | |
| fprintf (st, "\nError handling is as follows:\n\n"); | |
| fprintf (st, " error STOP_IOE processed as\n"); | |
| fprintf (st, " not attached 1 report error and stop\n"); | |
| fprintf (st, " 0 disk not ready\n\n"); | |
| fprintf (st, " end of file x assume rest of disk is zero\n"); | |
| fprintf (st, " OS I/O error x report error and stop\n"); | |
| return SCPE_OK; | |
| } | |
| const char *rk_description (DEVICE *dptr) | |
| { | |
| return "RK11/RKV11 cartridge disk controller"; | |
| } |