| /* pdp11_rs.c - RS03/RS04 Massbus disk controller | |
| Copyright (c) 2013, 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. | |
| rs RS03/RS04 fixed head disks | |
| */ | |
| #if defined (VM_PDP10) | |
| #error "RS03/RS04 not supported on the PDP-10!" | |
| #elif defined (VM_PDP11) | |
| #include "pdp11_defs.h" | |
| #define DEV_RADIX 8 | |
| #elif defined (VM_VAX) | |
| #error "RS03/RS04 not supported on the VAX!" | |
| #endif | |
| #include <math.h> | |
| #define RS_NUMDR 8 /* #drives */ | |
| #define RS03_NUMWD 64 /* words/sector */ | |
| #define RS04_NUMWD 128 /* words/sector */ | |
| #define RS_NUMSC 64 /* sectors/track */ | |
| #define RS_NUMTK 64 /* tracks/disk */ | |
| #define RS_MAXFR (1 << 16) /* max transfer */ | |
| #define GET_POS(x) ((int) fmod (sim_gtime() / ((double) (x)), \ | |
| ((double) (RS03_NUMWD * RS_NUMSC)))) | |
| #define RS03_ID 0 | |
| #define RS04_ID 2 | |
| #define RS03_SIZE (RS_NUMTK * RS_NUMSC * RS03_NUMWD) | |
| #define RS04_SIZE (RS_NUMTK * RS_NUMSC * RS04_NUMWD) | |
| #define RS_NUMWD(d) ((d)? RS04_NUMWD: RS03_NUMWD) | |
| #define RS_SIZE(d) ((d)? RS04_SIZE: RS03_SIZE) | |
| /* Flags in the unit flags word */ | |
| #define UNIT_V_DTYPE (UNIT_V_UF + 0) /* disk type */ | |
| #define RS03_DTYPE (0) | |
| #define RS04_DTYPE (1) | |
| #define UNIT_V_AUTO (UNIT_V_UF + 1) /* autosize */ | |
| #define UNIT_V_WLK (UNIT_V_UF + 2) /* write lock */ | |
| #define UNIT_DTYPE (1 << UNIT_V_DTYPE) | |
| #define UNIT_AUTO (1 << UNIT_V_AUTO) | |
| #define UNIT_WLK (1 << UNIT_V_WLK) | |
| #define GET_DTYPE(x) (((x) >> UNIT_V_DTYPE) & 1) | |
| /* RSCS1 - control/status 1 - offset 0 */ | |
| #define RS_CS1_OF 0 | |
| #define CS1_GO CSR_GO /* go */ | |
| #define CS1_V_FNC 1 /* function pos */ | |
| #define CS1_M_FNC 037 /* function mask */ | |
| #define CS1_N_FNC (CS1_M_FNC + 1) | |
| #define FNC_NOP 000 /* no operation */ | |
| #define FNC_DCLR 004 /* drive clear */ | |
| #define FNC_SEARCH 014 /* search */ | |
| #define FNC_XFR 020 /* divide line for xfr */ | |
| #define FNC_WCHK 024 /* write check */ | |
| #define FNC_WRITE 030 /* write */ | |
| #define FNC_READ 034 /* read */ | |
| #define CS1_RW 076 | |
| #define CS1_DVA 04000 /* drive avail */ | |
| #define GET_FNC(x) (((x) >> CS1_V_FNC) & CS1_M_FNC) | |
| /* RSDS - drive status - offset 1 */ | |
| #define RS_DS_OF 1 | |
| #define DS_RDY 0000200 /* drive ready */ | |
| #define DS_DPR 0000400 /* drive present */ | |
| #define DS_LST 0002000 /* last sector */ | |
| #define DS_WLK 0004000 /* write locked */ | |
| #define DS_MOL 0010000 /* medium online */ | |
| #define DS_PIP 0020000 /* pos in progress */ | |
| #define DS_ERR 0040000 /* error */ | |
| #define DS_ATA 0100000 /* attention active */ | |
| #define DS_MBZ 0001177 | |
| /* RSER - error status - offset 2 */ | |
| #define RS_ER_OF 2 | |
| #define ER_ILF 0000001 /* illegal func */ | |
| #define ER_ILR 0000002 /* illegal register */ | |
| #define ER_RMR 0000004 /* reg mod refused */ | |
| #define ER_PAR 0000010 /* parity err */ | |
| #define ER_AOE 0001000 /* addr ovflo err */ | |
| #define ER_IAE 0002000 /* invalid addr err */ | |
| #define ER_WLE 0004000 /* write lock err NI */ | |
| #define ER_DTE 0010000 /* drive time err NI */ | |
| #define ER_OPI 0020000 /* op incomplete */ | |
| #define ER_UNS 0040000 /* drive unsafe */ | |
| #define ER_DCK 0100000 /* data check NI */ | |
| #define ER_MBZ 0000760 | |
| /* RSMR - maintenace register - offset 3 */ | |
| #define RS_MR_OF 3 | |
| /* RSAS - attention summary - offset 4 */ | |
| #define RS_AS_OF 4 | |
| #define AS_U0 0000001 /* unit 0 flag */ | |
| /* RSDA - sector/track - offset 5 | |
| All 16b are RW, but only <14:12> are tested for "invalid" address */ | |
| #define RS_DA_OF 5 | |
| #define DA_V_SC 0 /* sector pos */ | |
| #define DA_M_SC 077 /* sector mask */ | |
| #define DA_V_TK 6 /* track pos */ | |
| #define DA_M_TK 077 /* track mask */ | |
| #define GET_SC(x) (((x) >> DA_V_SC) & DA_M_SC) | |
| #define GET_TK(x) (((x) >> DA_V_TK) & DA_M_TK) | |
| #define DA_INV 0070000 /* inv addr */ | |
| #define DA_IGN 0100000 /* ignored */ | |
| /* RSDT - drive type - offset 6 */ | |
| #define RS_DT_OF 6 | |
| /* RSLA - look ahead register - offset 7 */ | |
| #define RS_LA_OF 7 | |
| /* This controller supports many two disk drive types: | |
| type #words/ #sectors/ #tracks/ | |
| sector track drive | |
| RS03 64 64 64 =256KW | |
| RS04 128 64 640 =512KW | |
| In theory, each drive can be a different type. The size field in | |
| each unit selects the drive capacity for each drive and thus the | |
| drive type. | |
| */ | |
| uint16 rscs1[RS_NUMDR] = { 0 }; /* control/status 1 */ | |
| uint16 rsda[RS_NUMDR] = { 0 }; /* track/sector */ | |
| uint16 rsds[RS_NUMDR] = { 0 }; /* drive status */ | |
| uint16 rser[RS_NUMDR] = { 0 }; /* error status */ | |
| uint16 rsmr[RS_NUMDR] = { 0 }; /* maint register */ | |
| uint8 rswlk[RS_NUMDR] = { 0 }; /* wlk switches */ | |
| int32 rs_stopioe = 1; /* stop on error */ | |
| int32 rs_wait = 10; /* rotate time */ | |
| static const char *rs_fname[CS1_N_FNC] = { | |
| "NOP", "01", "02", "03", "DCLR", "05", "06", "07", | |
| "10", "11", "12", "13", "SCH", "15", "16", "17", | |
| "20", "21", "22", "23", "WRCHK", "25", "26", "27", | |
| "WRITE", "31", "32", "33", "READ", "35", "36", "37" | |
| }; | |
| t_stat rs_mbrd (int32 *data, int32 ofs, int32 drv); | |
| t_stat rs_mbwr (int32 data, int32 ofs, int32 drv); | |
| t_stat rs_svc (UNIT *uptr); | |
| t_stat rs_reset (DEVICE *dptr); | |
| t_stat rs_attach (UNIT *uptr, char *cptr); | |
| t_stat rs_detach (UNIT *uptr); | |
| t_stat rs_boot (int32 unitno, DEVICE *dptr); | |
| void rs_set_er (int32 flg, int32 drv); | |
| void rs_clr_as (int32 mask); | |
| void rs_update_ds (int32 flg, int32 drv); | |
| t_stat rs_go (int32 drv); | |
| t_stat rs_set_size (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| int32 rs_abort (void); | |
| t_stat rs_help (FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, char *cptr); | |
| char *rs_description (DEVICE *dptr); | |
| /* RS data structures | |
| rs_dev RS device descriptor | |
| rs_unit RS unit list | |
| rs_reg RS register list | |
| rs_mod RS modifier list | |
| */ | |
| DIB rs_dib = { MBA_RS, 0, &rs_mbrd, &rs_mbwr, 0, 0, 0, { &rs_abort } }; | |
| UNIT rs_unit[] = { | |
| { UDATA (&rs_svc, UNIT_FIX|UNIT_ATTABLE|UNIT_DISABLE|UNIT_AUTO+ | |
| UNIT_BUFABLE|UNIT_MUSTBUF|(RS04_DTYPE << UNIT_V_DTYPE), RS04_SIZE) }, | |
| { UDATA (&rs_svc, UNIT_FIX|UNIT_ATTABLE|UNIT_DISABLE|UNIT_AUTO+ | |
| UNIT_BUFABLE|UNIT_MUSTBUF|(RS04_DTYPE << UNIT_V_DTYPE), RS04_SIZE) }, | |
| { UDATA (&rs_svc, UNIT_FIX|UNIT_ATTABLE|UNIT_DISABLE|UNIT_AUTO+ | |
| UNIT_BUFABLE|UNIT_MUSTBUF|(RS04_DTYPE << UNIT_V_DTYPE), RS04_SIZE) }, | |
| { UDATA (&rs_svc, UNIT_FIX|UNIT_ATTABLE|UNIT_DISABLE|UNIT_AUTO+ | |
| UNIT_BUFABLE|UNIT_MUSTBUF|(RS04_DTYPE << UNIT_V_DTYPE), RS04_SIZE) }, | |
| { UDATA (&rs_svc, UNIT_FIX|UNIT_ATTABLE|UNIT_DISABLE|UNIT_AUTO+ | |
| UNIT_BUFABLE|UNIT_MUSTBUF|(RS04_DTYPE << UNIT_V_DTYPE), RS04_SIZE) }, | |
| { UDATA (&rs_svc, UNIT_FIX|UNIT_ATTABLE|UNIT_DISABLE|UNIT_AUTO+ | |
| UNIT_BUFABLE|UNIT_MUSTBUF|(RS04_DTYPE << UNIT_V_DTYPE), RS04_SIZE) }, | |
| { UDATA (&rs_svc, UNIT_FIX|UNIT_ATTABLE|UNIT_DISABLE|UNIT_AUTO+ | |
| UNIT_BUFABLE|UNIT_MUSTBUF|(RS04_DTYPE << UNIT_V_DTYPE), RS04_SIZE) }, | |
| { UDATA (&rs_svc, UNIT_FIX|UNIT_ATTABLE|UNIT_DISABLE|UNIT_AUTO+ | |
| UNIT_BUFABLE|UNIT_MUSTBUF|(RS04_DTYPE << UNIT_V_DTYPE), RS04_SIZE) } | |
| }; | |
| REG rs_reg[] = { | |
| { BRDATAD (CS1, rscs1, DEV_RDX, 16, RS_NUMDR, "control/status 1") }, | |
| { BRDATAD (DA, rsda, DEV_RDX, 16, RS_NUMDR, "track/sector") }, | |
| { BRDATAD (DS, rsds, DEV_RDX, 16, RS_NUMDR, "drive status") }, | |
| { BRDATAD (ER, rser, DEV_RDX, 16, RS_NUMDR, "error status") }, | |
| { BRDATAD (MR, rsmr, DEV_RDX, 16, RS_NUMDR, "maint register") }, | |
| { BRDATAD (WLKS, rswlk, DEV_RDX, 6, RS_NUMDR, "write lock switches") }, | |
| { DRDATAD (TIME, rs_wait, 24, "rotate time"), REG_NZ + PV_LEFT }, | |
| { URDATAD (CAPAC, rs_unit[0].capac, 10, T_ADDR_W, 0, | |
| RS_NUMDR, PV_LEFT | REG_HRO, "Capacity") }, | |
| { FLDATAD (STOP_IOE, rs_stopioe, 0, "stop on I/O error") }, | |
| { NULL } | |
| }; | |
| MTAB rs_mod[] = { | |
| { MTAB_XTD|MTAB_VDV, 0, "MASSBUS", NULL, NULL, &mba_show_num, NULL, "Display Massbus Address" }, | |
| { UNIT_WLK, 0, "write enabled", "WRITEENABLED", NULL, NULL, NULL, "Write enable disk drive" }, | |
| { UNIT_WLK, UNIT_WLK, "write lockable", "LOCKED", NULL, NULL, NULL, "Write lock disk drive" }, | |
| { (UNIT_DTYPE|UNIT_ATT), (RS03_DTYPE << UNIT_V_DTYPE) + UNIT_ATT, | |
| "RS03", NULL, NULL }, | |
| { (UNIT_DTYPE|UNIT_ATT), (RS04_DTYPE << UNIT_V_DTYPE) + UNIT_ATT, | |
| "RS04", NULL, NULL }, | |
| { (UNIT_AUTO|UNIT_DTYPE|UNIT_ATT), (RS03_DTYPE << UNIT_V_DTYPE), | |
| "RS03", NULL, NULL }, | |
| { (UNIT_AUTO|UNIT_DTYPE|UNIT_ATT), (RS04_DTYPE << UNIT_V_DTYPE), | |
| "RS04", NULL, NULL }, | |
| { (UNIT_AUTO+UNIT_ATT), UNIT_AUTO, "autosize", NULL, NULL }, | |
| { UNIT_AUTO, UNIT_AUTO, NULL, "AUTOSIZE", NULL, NULL, NULL, "set type based on file size at ATTACH" }, | |
| { (UNIT_AUTO|UNIT_DTYPE), (RS03_DTYPE << UNIT_V_DTYPE), | |
| NULL, "RS03", &rs_set_size, NULL, NULL, "Set drive type RS03" }, | |
| { (UNIT_AUTO|UNIT_DTYPE), (RS04_DTYPE << UNIT_V_DTYPE), | |
| NULL, "RS04", &rs_set_size, NULL, NULL, "Set drive type RS04" }, | |
| { 0 } | |
| }; | |
| DEVICE rs_dev = { | |
| "RS", rs_unit, rs_reg, rs_mod, | |
| RS_NUMDR, DEV_RADIX, 19, 1, DEV_RADIX, 16, | |
| NULL, NULL, &rs_reset, | |
| &rs_boot, &rs_attach, &rs_detach, | |
| &rs_dib, DEV_DISABLE|DEV_DIS|DEV_UBUS|DEV_QBUS|DEV_MBUS|DEV_DEBUG, 0, | |
| NULL, NULL, NULL, &rs_help, NULL, NULL, | |
| &rs_description | |
| }; | |
| /* Massbus register read */ | |
| t_stat rs_mbrd (int32 *data, int32 ofs, int32 drv) | |
| { | |
| uint32 val, dtype, i; | |
| UNIT *uptr; | |
| rs_update_ds (0, drv); /* update ds */ | |
| uptr = rs_dev.units + drv; /* get unit */ | |
| if (uptr->flags & UNIT_DIS) { /* nx disk */ | |
| *data = 0; | |
| return MBE_NXD; | |
| } | |
| dtype = GET_DTYPE (uptr->flags); /* get drive type */ | |
| ofs = ofs & MBA_RMASK; /* mask offset */ | |
| switch (ofs) { /* decode offset */ | |
| case RS_CS1_OF: /* RSCS1 */ | |
| val = (rscs1[drv] & CS1_RW) | CS1_DVA; /* DVA always set */ | |
| break; | |
| case RS_DA_OF: /* RSDA */ | |
| val = rsda[drv]; | |
| break; | |
| case RS_DS_OF: /* RSDS */ | |
| val = rsds[drv] & ~DS_MBZ; | |
| break; | |
| case RS_ER_OF: /* RSER */ | |
| val = rser[drv] & ~ER_MBZ; | |
| break; | |
| case RS_AS_OF: /* RSAS */ | |
| val = 0; | |
| for (i = 0; i < RS_NUMDR; i++) { | |
| if (rsds[i] & DS_ATA) | |
| val |= (AS_U0 << i); | |
| } | |
| break; | |
| case RS_LA_OF: /* RSLA */ | |
| val = GET_POS (rs_wait); | |
| break; | |
| case RS_MR_OF: /* RSMR */ | |
| val = rsmr[drv]; | |
| break; | |
| case RS_DT_OF: /* RSDT */ | |
| val = dtype? RS04_ID: RS03_ID; | |
| break; | |
| default: /* all others */ | |
| *data = 0; | |
| return MBE_NXR; | |
| } | |
| *data = val; | |
| return SCPE_OK; | |
| } | |
| /* Massbus register write */ | |
| t_stat rs_mbwr (int32 data, int32 ofs, int32 drv) | |
| { | |
| int32 dtype; | |
| UNIT *uptr; | |
| uptr = rs_dev.units + drv; /* get unit */ | |
| if (uptr->flags & UNIT_DIS) /* nx disk */ | |
| return MBE_NXD; | |
| if ((ofs != RS_AS_OF) && sim_is_active (uptr)) { /* unit busy? */ | |
| rs_set_er (ER_RMR, drv); /* won't write */ | |
| rs_update_ds (0, drv); | |
| return SCPE_OK; | |
| } | |
| dtype = GET_DTYPE (uptr->flags); /* get drive type */ | |
| ofs = ofs & MBA_RMASK; /* mask offset */ | |
| switch (ofs) { /* decode PA<5:1> */ | |
| case RS_CS1_OF: /* RSCS1 */ | |
| rscs1[drv] = data & CS1_RW; | |
| if (data & CS1_GO) /* start op */ | |
| return rs_go (drv); | |
| break; | |
| case RS_DA_OF: /* RSDA */ | |
| rsda[drv] = data; | |
| break; | |
| case RS_AS_OF: /* RSAS */ | |
| rs_clr_as (data); | |
| break; | |
| case RS_MR_OF: /* RSMR */ | |
| rsmr[drv] = data; | |
| break; | |
| case RS_ER_OF: /* RSER */ | |
| case RS_DS_OF: /* RSDS */ | |
| case RS_LA_OF: /* RSLA */ | |
| case RS_DT_OF: /* RSDT */ | |
| break; /* read only */ | |
| default: /* all others */ | |
| return MBE_NXR; | |
| } /* end switch */ | |
| rs_update_ds (0, drv); /* update status */ | |
| return SCPE_OK; | |
| } | |
| /* Initiate operation - unit not busy, function set */ | |
| t_stat rs_go (int32 drv) | |
| { | |
| int32 fnc, dtype, t; | |
| UNIT *uptr; | |
| fnc = GET_FNC (rscs1[drv]); /* get function */ | |
| if (DEBUG_PRS (rs_dev)) | |
| fprintf (sim_deb, ">>RS%d STRT: fnc=%s, ds=%o, da=%o, er=%o\n", | |
| drv, rs_fname[fnc], rsds[drv], rsda[drv], rser[drv]); | |
| uptr = rs_dev.units + drv; /* get unit */ | |
| rs_clr_as (AS_U0 << drv); /* clear attention */ | |
| dtype = GET_DTYPE (uptr->flags); /* get drive type */ | |
| if ((fnc != FNC_DCLR) && (rsds[drv] & DS_ERR)) { /* err & ~clear? */ | |
| rs_set_er (ER_ILF, drv); /* not allowed */ | |
| rs_update_ds (DS_ATA, drv); /* set attention */ | |
| return MBE_GOE; | |
| } | |
| switch (fnc) { /* case on function */ | |
| case FNC_DCLR: /* drive clear */ | |
| rser[drv] = 0; /* clear errors */ | |
| case FNC_NOP: /* no operation */ | |
| return SCPE_OK; | |
| case FNC_SEARCH: /* search */ | |
| case FNC_WRITE: /* write */ | |
| case FNC_WCHK: /* write check */ | |
| case FNC_READ: /* read */ | |
| if ((uptr->flags & UNIT_ATT) == 0) { /* not attached? */ | |
| rs_set_er (ER_UNS, drv); /* unsafe */ | |
| break; | |
| } | |
| if (rsda[drv] & DA_INV) { /* bad address? */ | |
| rs_set_er (ER_IAE, drv); | |
| break; | |
| } | |
| rsds[drv] = rsds[drv] & ~DS_RDY; /* clr drive rdy */ | |
| if (fnc == FNC_SEARCH) /* search? */ | |
| rsds[drv] = rsds[drv] | DS_PIP; /* set PIP */ | |
| t = abs (rsda[drv] - GET_POS (rs_wait)); /* pos diff */ | |
| if (t < 1) /* min time */ | |
| t = 1; | |
| sim_activate (uptr, rs_wait * t); /* schedule */ | |
| return SCPE_OK; | |
| default: /* all others */ | |
| rs_set_er (ER_ILF, drv); /* not supported */ | |
| break; | |
| } | |
| rs_update_ds (DS_ATA, drv); /* set attn, req int */ | |
| return MBE_GOE; | |
| } | |
| /* Abort opertion - there is a data transfer in progress */ | |
| int32 rs_abort (void) | |
| { | |
| return rs_reset (&rs_dev); | |
| } | |
| /* Service unit timeout | |
| Complete search or data transfer command | |
| Unit must exist - can't remove an active unit | |
| Drives are buffered in memory - no IO errors | |
| */ | |
| t_stat rs_svc (UNIT *uptr) | |
| { | |
| int32 i, fnc, dtype, drv; | |
| int32 wc, abc, awc, mbc, da; | |
| uint16 *fbuf = (uint16 *)uptr->filebuf; | |
| dtype = GET_DTYPE (uptr->flags); /* get drive type */ | |
| drv = (int32) (uptr - rs_dev.units); /* get drv number */ | |
| da = rsda[drv] * RS_NUMWD (dtype); /* get disk addr */ | |
| fnc = GET_FNC (rscs1[drv]); /* get function */ | |
| if ((uptr->flags & UNIT_ATT) == 0) { /* not attached? */ | |
| rs_set_er (ER_UNS, drv); /* set drive error */ | |
| if (fnc >= FNC_XFR) /* xfr? set done */ | |
| mba_set_don (rs_dib.ba); | |
| rs_update_ds (DS_ATA, drv); /* set attn */ | |
| return (rs_stopioe? SCPE_UNATT: SCPE_OK); | |
| } | |
| rsds[drv] = (rsds[drv] & ~DS_PIP) | DS_RDY; /* change drive status */ | |
| switch (fnc) { /* case on function */ | |
| case FNC_SEARCH: /* search */ | |
| rs_update_ds (DS_ATA, drv); | |
| break; | |
| case FNC_WRITE: /* write */ | |
| if ((uptr->flags & UNIT_WLK) && /* write locked? */ | |
| (GET_TK (rsda[drv]) <= (int32) rswlk[drv])) { | |
| rs_set_er (ER_WLE, drv); /* set drive error */ | |
| mba_set_exc (rs_dib.ba); /* set exception */ | |
| rs_update_ds (DS_ATA, drv); /* set attn */ | |
| return SCPE_OK; | |
| } | |
| case FNC_WCHK: /* write check */ | |
| case FNC_READ: /* read */ | |
| if (rsda[drv] & DA_INV) { /* bad addr? */ | |
| rs_set_er (ER_IAE, drv); /* set error */ | |
| mba_set_exc (rs_dib.ba); /* set exception */ | |
| rs_update_ds (DS_ATA, drv); /* set attn */ | |
| break; | |
| } | |
| fbuf = fbuf + da; /* ptr into buffer */ | |
| mbc = mba_get_bc (rs_dib.ba); /* get byte count */ | |
| wc = (mbc + 1) >> 1; /* convert to words */ | |
| if ((da + wc) > RS_SIZE (dtype)) { /* disk overrun? */ | |
| rs_set_er (ER_AOE, drv); /* set err */ | |
| wc = RS_SIZE (dtype) - da; /* trim xfer */ | |
| mbc = wc << 1; /* trim mb count */ | |
| } | |
| if (fnc == FNC_WRITE) { /* write? */ | |
| abc = mba_rdbufW (rs_dib.ba, mbc, fbuf); /* rd mem to buf */ | |
| wc = (abc + 1) >> 1; /* actual # wds */ | |
| awc = (wc + (RS_NUMWD (dtype) - 1)) & ~(RS_NUMWD (dtype) - 1); | |
| for (i = wc; i < awc; i++) /* fill buf */ | |
| fbuf[i] = 0; | |
| if ((da + awc) > (int32) uptr->hwmark) /* update hw mark*/ | |
| uptr->hwmark = da + awc; | |
| } /* end if wr */ | |
| else if (fnc == FNC_READ) /* read */ | |
| mba_wrbufW (rs_dib.ba, mbc, fbuf); /* wri buf to mem */ | |
| else mba_chbufW (rs_dib.ba, mbc, fbuf); /* check vs mem */ | |
| da = da + wc + (RS_NUMWD (dtype) - 1); | |
| if (da >= RS_SIZE (dtype)) | |
| rsds[drv] = rsds[drv] | DS_LST; | |
| rsda[drv] = da / RS_NUMWD (dtype); | |
| mba_set_don (rs_dib.ba); /* set done */ | |
| rs_update_ds (0, drv); /* update ds */ | |
| break; | |
| } /* end case func */ | |
| if (DEBUG_PRS (rs_dev)) | |
| fprintf (sim_deb, ">>RS%d DONE: fnc=%s, ds=%o, da=%o, er=%d\n", | |
| drv, rs_fname[fnc], rsds[drv], rsda[drv], rser[drv]); | |
| return SCPE_OK; | |
| } | |
| /* Set drive error */ | |
| void rs_set_er (int32 flag, int32 drv) | |
| { | |
| rser[drv] = rser[drv] | flag; | |
| rsds[drv] = rsds[drv] | DS_ATA; | |
| mba_upd_ata (rs_dib.ba, 1); | |
| return; | |
| } | |
| /* Clear attention flags */ | |
| void rs_clr_as (int32 mask) | |
| { | |
| uint32 i, as; | |
| for (i = as = 0; i < RS_NUMDR; i++) { | |
| if (mask & (AS_U0 << i)) | |
| rsds[i] &= ~DS_ATA; | |
| if (rsds[i] & DS_ATA) | |
| as = 1; | |
| } | |
| mba_upd_ata (rs_dib.ba, as); | |
| return; | |
| } | |
| /* Drive status update */ | |
| void rs_update_ds (int32 flag, int32 drv) | |
| { | |
| if (flag & DS_ATA) | |
| mba_upd_ata (rs_dib.ba, 1); | |
| if (rs_unit[drv].flags & UNIT_DIS) { | |
| rsds[drv] = rser[drv] = 0; | |
| return; | |
| } | |
| else rsds[drv] = (rsds[drv] | DS_DPR) & ~(DS_ERR | DS_WLK); | |
| if (rs_unit[drv].flags & UNIT_ATT) { | |
| rsds[drv] = rsds[drv] | DS_MOL; | |
| if ((rs_unit[drv].flags & UNIT_WLK) && | |
| (GET_TK (rsda[drv]) <= (int32) rswlk[drv])) | |
| rsds[drv] = rsds[drv] | DS_WLK; | |
| } | |
| if (rser[drv]) | |
| rsds[drv] = rsds[drv] | DS_ERR; | |
| rsds[drv] = rsds[drv] | flag; | |
| return; | |
| } | |
| /* Device reset */ | |
| t_stat rs_reset (DEVICE *dptr) | |
| { | |
| int32 i; | |
| UNIT *uptr; | |
| mba_set_enbdis (MBA_RS, rs_dev.flags & DEV_DIS); | |
| for (i = 0; i < RS_NUMDR; i++) { | |
| uptr = rs_dev.units + i; | |
| sim_cancel (uptr); | |
| rscs1[i] = 0; | |
| rser[i] = 0; | |
| rsda[i] = 0; | |
| rsmr[i] = 0; | |
| rsds[i] = DS_RDY; | |
| rs_update_ds (0, i); /* upd drive status */ | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Device attach */ | |
| t_stat rs_attach (UNIT *uptr, char *cptr) | |
| { | |
| int32 drv, p; | |
| t_stat r; | |
| uptr->capac = RS_SIZE (GET_DTYPE (uptr->flags)); | |
| r = attach_unit (uptr, cptr); /* attach unit */ | |
| if (r != SCPE_OK) /* error? */ | |
| return r; | |
| drv = (int32) (uptr - rs_dev.units); /* get drv number */ | |
| rsds[drv] = DS_MOL | DS_RDY | DS_DPR; /* upd drv status */ | |
| rser[drv] = 0; | |
| rs_update_ds (DS_ATA, drv); /* upd drive status */ | |
| if ((uptr->flags & UNIT_AUTO) == 0) /* autosize? */ | |
| return SCPE_OK; | |
| p = sim_fsize (uptr->fileref); /* get file size */ | |
| if (((p + 1) >> 1) <= RS03_SIZE) { | |
| uptr->flags &= ~UNIT_DTYPE; | |
| uptr->capac = RS03_SIZE; | |
| } | |
| else { | |
| uptr->flags |= UNIT_DTYPE; | |
| uptr->capac = RS04_SIZE; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Device detach */ | |
| t_stat rs_detach (UNIT *uptr) | |
| { | |
| int32 drv; | |
| extern int32 sim_is_running; | |
| if (!(uptr->flags & UNIT_ATT)) /* attached? */ | |
| return SCPE_OK; | |
| drv = (int32) (uptr - rs_dev.units); /* get drv number */ | |
| rsds[drv] = 0; | |
| if (!sim_is_running) /* from console? */ | |
| rs_update_ds (DS_ATA, drv); /* request intr */ | |
| return detach_unit (uptr); | |
| } | |
| /* Set size command validation routine */ | |
| t_stat rs_set_size (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| int32 dtype = GET_DTYPE (val); | |
| if (uptr->flags & UNIT_ATT) | |
| return SCPE_ALATT; | |
| uptr->capac = RS_SIZE (dtype); | |
| return SCPE_OK; | |
| } | |
| /* Set bad block routine */ | |
| /* Boot routine */ | |
| #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 + 014) /* CSR */ | |
| #define BOOT_LEN (sizeof (boot_rom) / sizeof (uint16)) | |
| static const uint16 boot_rom[] = { | |
| 0042123, /* "SD" */ | |
| 0012706, BOOT_START, /* mov #boot_start, sp */ | |
| 0012700, 0000000, /* mov #unit, r0 */ | |
| 0012701, 0172040, /* mov #RSCS1, r1 */ | |
| 0012761, 0000040, 0000010, /* mov #CS2_CLR, 10(r1) ; reset */ | |
| 0010061, 0000010, /* mov r0, 10(r1) ; set unit */ | |
| 0012761, 0177000, 0000002, /* mov #-512., 2(r1) ; set wc */ | |
| 0005061, 0000004, /* clr 4(r1) ; clr ba */ | |
| 0005061, 0000006, /* clr 6(r1) ; clr da */ | |
| 0012711, 0000071, /* mov #READ+GO, (r1) ; read */ | |
| 0105711, /* tstb (r1) ; wait */ | |
| 0100376, /* bpl .-2 */ | |
| 0005002, /* clr R2 */ | |
| 0005003, /* clr R3 */ | |
| 0012704, BOOT_START+020, /* mov #start+020, r4 */ | |
| 0005005, /* clr R5 */ | |
| 0105011, /* clrb (r1) */ | |
| 0005007 /* clr PC */ | |
| }; | |
| t_stat rs_boot (int32 unitno, DEVICE *dptr) | |
| { | |
| int32 i; | |
| extern int32 saved_PC; | |
| extern uint16 *M; | |
| UNIT *uptr = rs_dev.units + unitno; | |
| for (i = 0; i < BOOT_LEN; i++) | |
| M[(BOOT_START >> 1) + i] = boot_rom[i]; | |
| M[BOOT_UNIT >> 1] = unitno & (RS_NUMDR - 1); | |
| M[BOOT_CSR >> 1] = mba_get_csr (rs_dib.ba) & DMASK; | |
| saved_PC = BOOT_ENTRY; | |
| return SCPE_OK; | |
| } | |
| t_stat rs_help (FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, char *cptr) | |
| { | |
| fprintf (st, "RS03/RS04 Massbus disk controller (RS)\n\n"); | |
| fprintf (st, "The RS controller implements the Massbus family fixed head disks. RS\n"); | |
| fprintf (st, "options include the ability to set units write enabled or write locked,\n"); | |
| fprintf (st, "to set the drive type to RS03, RS04, or autosize:\n\n"); | |
| fprint_set_help (st, dptr); | |
| fprint_show_help (st, dptr); | |
| fprintf (st, "\nThe type options can be used only when a unit is not attached to a file.\n"); | |
| fprintf (st, "The RS device supports the BOOT command.\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, "RS data files are buffered in memory; therefore, end of file and OS I/O\n"); | |
| fprintf (st, "errors cannot occur.\n"); | |
| return SCPE_OK; | |
| } | |
| char *rs_description (DEVICE *dptr) | |
| { | |
| return "RS03/RS04 Massbus disk controller"; | |
| } |