| /* pdp18b_rf.c: fixed head disk simulator | |
| Copyright (c) 1993-2006, 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. | |
| rf (PDP-9) RF09/RF09 | |
| (PDP-15) RF15/RS09 | |
| 04-Oct-06 RMS Fixed bug, DSCD does not clear function register | |
| 15-May-06 RMS Fixed bug in autosize attach (reported by David Gesswein) | |
| 14-Jan-04 RMS Revised IO device call interface | |
| Changed sim_fsize calling sequence | |
| 26-Oct-03 RMS Cleaned up buffer copy code | |
| 26-Jul-03 RMS Fixed bug in set size routine | |
| 14-Mar-03 RMS Fixed variable platter interaction with save/restore | |
| 03-Mar-03 RMS Fixed autosizing | |
| 12-Feb-03 RMS Removed 8 platter sizing hack | |
| 05-Feb-03 RMS Fixed decode bugs, added variable and autosizing | |
| 05-Oct-02 RMS Added DIB, dev number support | |
| 06-Jan-02 RMS Revised enable/disable support | |
| 25-Nov-01 RMS Revised interrupt structure | |
| 24-Nov-01 RMS Changed WLK to array | |
| 26-Apr-01 RMS Added device enable/disable support | |
| 15-Feb-01 RMS Fixed 3 cycle data break sequencing | |
| 30-Nov-99 RMS Added non-zero requirement to rf_time | |
| 14-Apr-99 RMS Changed t_addr to unsigned | |
| The RFxx is a head-per-track disk. It uses the multicycle data break | |
| facility. To minimize overhead, the entire RFxx is buffered in memory. | |
| Two timing parameters are provided: | |
| rf_time Interword timing. Must be non-zero. | |
| rf_burst Burst mode. If 0, DMA occurs cycle by cycle; otherwise, | |
| DMA occurs in a burst. | |
| */ | |
| #include "pdp18b_defs.h" | |
| #include <math.h> | |
| #define UNIT_V_AUTO (UNIT_V_UF + 0) /* autosize */ | |
| #define UNIT_V_PLAT (UNIT_V_UF + 1) /* #platters - 1 */ | |
| #define UNIT_M_PLAT 07 | |
| #define UNIT_PLAT (UNIT_M_PLAT << UNIT_V_PLAT) | |
| #define UNIT_GETP(x) ((((x) >> UNIT_V_PLAT) & UNIT_M_PLAT) + 1) | |
| #define UNIT_AUTO (1 << UNIT_V_AUTO) | |
| #define UNIT_PLAT (UNIT_M_PLAT << UNIT_V_PLAT) | |
| /* Constants */ | |
| #define RF_NUMWD 2048 /* words/track */ | |
| #define RF_NUMTR 128 /* tracks/disk */ | |
| #define RF_DKSIZE (RF_NUMTR * RF_NUMWD) /* words/disk */ | |
| #define RF_NUMDK 8 /* disks/controller */ | |
| #define RF_WMASK (RF_NUMWD - 1) /* word mask */ | |
| #define RF_WC 036 /* word count */ | |
| #define RF_CA 037 /* current addr */ | |
| /* Function/status register */ | |
| #define RFS_ERR 0400000 /* error */ | |
| #define RFS_HDW 0200000 /* hardware error */ | |
| #define RFS_APE 0100000 /* addr parity error */ | |
| #define RFS_MXF 0040000 /* missed transfer */ | |
| #define RFS_WCE 0020000 /* write check error */ | |
| #define RFS_DPE 0010000 /* data parity error */ | |
| #define RFS_WLO 0004000 /* write lock error */ | |
| #define RFS_NED 0002000 /* non-existent disk */ | |
| #define RFS_DCH 0001000 /* data chan timing */ | |
| #define RFS_PGE 0000400 /* programming error */ | |
| #define RFS_DON 0000200 /* transfer complete */ | |
| #define RFS_V_FNC 1 /* function */ | |
| #define RFS_M_FNC 03 | |
| #define RFS_FNC (RFS_M_FNC << RFS_V_FNC) | |
| #define FN_NOP 0 | |
| #define FN_READ 1 | |
| #define FN_WRITE 2 | |
| #define FN_WCHK 3 | |
| #define RFS_IE 0000001 /* interrupt enable */ | |
| #define RFS_CLR 0000170 /* always clear */ | |
| #define RFS_EFLGS (RFS_HDW | RFS_APE | RFS_MXF | RFS_WCE | \ | |
| RFS_DPE | RFS_WLO | RFS_NED ) /* error flags */ | |
| #define RFS_FR (RFS_FNC|RFS_IE) | |
| #define GET_FNC(x) (((x) >> RFS_V_FNC) & RFS_M_FNC) | |
| #define GET_POS(x) ((int) fmod (sim_gtime () / ((double) (x)), \ | |
| ((double) RF_NUMWD))) | |
| #define RF_BUSY (sim_is_active (&rf_unit)) | |
| extern int32 M[]; | |
| extern int32 int_hwre[API_HLVL+1]; | |
| extern UNIT cpu_unit; | |
| int32 rf_sta = 0; /* status register */ | |
| int32 rf_da = 0; /* disk address */ | |
| int32 rf_dbuf = 0; /* data buffer */ | |
| int32 rf_wlk[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; /* write lock */ | |
| int32 rf_time = 10; /* inter-word time */ | |
| int32 rf_burst = 1; /* burst mode flag */ | |
| int32 rf_stopioe = 1; /* stop on error */ | |
| DEVICE rf_dev; | |
| int32 rf70 (int32 dev, int32 pulse, int32 dat); | |
| int32 rf72 (int32 dev, int32 pulse, int32 dat); | |
| int32 rf_iors (void); | |
| t_stat rf_svc (UNIT *uptr); | |
| t_stat rf_reset (DEVICE *dptr); | |
| int32 rf_updsta (int32 new); | |
| t_stat rf_attach (UNIT *uptr, char *cptr); | |
| t_stat rf_set_size (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| /* RF data structures | |
| rf_dev RF device descriptor | |
| rf_unit RF unit descriptor | |
| rf_reg RF register list | |
| */ | |
| DIB rf_dib = { DEV_RF, 3, &rf_iors, { &rf70, NULL, &rf72 } }; | |
| UNIT rf_unit = { | |
| UDATA (&rf_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_BUFABLE+UNIT_MUSTBUF+UNIT_AUTO, | |
| RF_DKSIZE) | |
| }; | |
| REG rf_reg[] = { | |
| { ORDATA (STA, rf_sta, 18) }, | |
| { ORDATA (DA, rf_da, 22) }, | |
| { ORDATA (WC, M[RF_WC], 18) }, | |
| { ORDATA (CA, M[RF_CA], 18) }, | |
| { ORDATA (BUF, rf_dbuf, 18) }, | |
| { FLDATA (INT, int_hwre[API_RF], INT_V_RF) }, | |
| { BRDATA (WLK, rf_wlk, 8, 16, RF_NUMDK) }, | |
| { DRDATA (TIME, rf_time, 24), PV_LEFT + REG_NZ }, | |
| { FLDATA (BURST, rf_burst, 0) }, | |
| { FLDATA (STOP_IOE, rf_stopioe, 0) }, | |
| { DRDATA (CAPAC, rf_unit.capac, 31), PV_LEFT + REG_HRO }, | |
| { ORDATA (DEVNO, rf_dib.dev, 6), REG_HRO }, | |
| { NULL } | |
| }; | |
| MTAB rf_mod[] = { | |
| { UNIT_PLAT, (0 << UNIT_V_PLAT), NULL, "1P", &rf_set_size }, | |
| { UNIT_PLAT, (1 << UNIT_V_PLAT), NULL, "2P", &rf_set_size }, | |
| { UNIT_PLAT, (2 << UNIT_V_PLAT), NULL, "3P", &rf_set_size }, | |
| { UNIT_PLAT, (3 << UNIT_V_PLAT), NULL, "4P", &rf_set_size }, | |
| { UNIT_PLAT, (4 << UNIT_V_PLAT), NULL, "5P", &rf_set_size }, | |
| { UNIT_PLAT, (5 << UNIT_V_PLAT), NULL, "6P", &rf_set_size }, | |
| { UNIT_PLAT, (6 << UNIT_V_PLAT), NULL, "7P", &rf_set_size }, | |
| { UNIT_PLAT, (7 << UNIT_V_PLAT), NULL, "8P", &rf_set_size }, | |
| { UNIT_AUTO, UNIT_AUTO, "autosize", "AUTOSIZE", NULL }, | |
| { MTAB_XTD|MTAB_VDV, 0, "DEVNO", "DEVNO", &set_devno, &show_devno }, | |
| { 0 } | |
| }; | |
| DEVICE rf_dev = { | |
| "RF", &rf_unit, rf_reg, rf_mod, | |
| 1, 8, 21, 1, 8, 18, | |
| NULL, NULL, &rf_reset, | |
| NULL, &rf_attach, NULL, | |
| &rf_dib, DEV_DISABLE | |
| }; | |
| /* IOT routines */ | |
| int32 rf70 (int32 dev, int32 pulse, int32 dat) | |
| { | |
| int32 t, sb; | |
| sb = pulse & 060; /* subopcode */ | |
| if (pulse & 01) { | |
| if ((sb == 000) && (rf_sta & (RFS_ERR | RFS_DON))) /* DSSF */ | |
| dat = IOT_SKP | dat; | |
| else if (sb == 020) rf_reset (&rf_dev); /* DSCC */ | |
| else if (sb == 040) { /* DSCF */ | |
| if (RF_BUSY) rf_sta = rf_sta | RFS_PGE; /* busy inhibits */ | |
| else rf_sta = rf_sta & ~(RFS_FNC | RFS_IE); /* clear func */ | |
| } | |
| } | |
| if (pulse & 02) { | |
| if (RF_BUSY) rf_sta = rf_sta | RFS_PGE; /* busy sets PGE */ | |
| else if (sb == 000) dat = dat | rf_dbuf; /* DRBR */ | |
| else if (sb == 020) /* DRAL */ | |
| dat = dat | (rf_da & DMASK); | |
| else if (sb == 040) /* DSFX */ | |
| rf_sta = rf_sta ^ (dat & (RFS_FNC | RFS_IE)); /* xor func */ | |
| else if (sb == 060) /* DRAH */ | |
| dat = dat | (rf_da >> 18) | ((rf_sta & RFS_NED)? 010: 0); | |
| } | |
| if (pulse & 04) { | |
| if (RF_BUSY) rf_sta = rf_sta | RFS_PGE; /* busy sets PGE */ | |
| else if (sb == 000) rf_dbuf = dat & DMASK; /* DLBR */ | |
| else if (sb == 020) /* DLAL */ | |
| rf_da = (rf_da & ~DMASK) | (dat & DMASK); | |
| else if (sb == 040) { /* DSCN */ | |
| rf_sta = rf_sta & ~RFS_DON; /* clear done */ | |
| if (GET_FNC (rf_sta) != FN_NOP) { | |
| t = (rf_da & RF_WMASK) - GET_POS (rf_time); /* delta to new */ | |
| if (t < 0) t = t + RF_NUMWD; /* wrap around? */ | |
| sim_activate (&rf_unit, t * rf_time); /* schedule op */ | |
| } | |
| } | |
| else if (sb == 060) { /* DLAH */ | |
| rf_da = (rf_da & DMASK) | ((dat & 07) << 18); | |
| if ((uint32) rf_da >= rf_unit.capac) /* for sizing */ | |
| rf_updsta (RFS_NED); | |
| } | |
| } | |
| rf_updsta (0); /* update status */ | |
| return dat; | |
| } | |
| int32 rf72 (int32 dev, int32 pulse, int32 dat) | |
| { | |
| int32 sb = pulse & 060; | |
| if (pulse & 02) { | |
| if (sb == 000) dat = dat | GET_POS (rf_time) | /* DLOK */ | |
| (sim_is_active (&rf_unit)? 0400000: 0); | |
| else if (sb == 040) { /* DSCD */ | |
| if (RF_BUSY) rf_sta = rf_sta | RFS_PGE; /* busy inhibits */ | |
| else rf_sta = rf_sta & RFS_FR; | |
| rf_updsta (0); | |
| } | |
| else if (sb == 060) { /* DSRS */ | |
| if (RF_BUSY) rf_sta = rf_sta | RFS_PGE; /* busy sets PGE */ | |
| dat = dat | rf_updsta (0); | |
| } | |
| } | |
| return dat; | |
| } | |
| /* Unit service - assumes the entire disk is buffered */ | |
| t_stat rf_svc (UNIT *uptr) | |
| { | |
| int32 f, pa, d, t; | |
| int32 *fbuf = uptr->filebuf; | |
| if ((uptr->flags & UNIT_BUF) == 0) { /* not buf? abort */ | |
| rf_updsta (RFS_NED | RFS_DON); /* set nxd, done */ | |
| return IORETURN (rf_stopioe, SCPE_UNATT); | |
| } | |
| f = GET_FNC (rf_sta); /* get function */ | |
| do { | |
| if ((uint32) rf_da >= uptr->capac) { /* disk overflow? */ | |
| rf_updsta (RFS_NED); /* nx disk error */ | |
| break; | |
| } | |
| M[RF_WC] = (M[RF_WC] + 1) & DMASK; /* incr word count */ | |
| pa = M[RF_CA] = (M[RF_CA] + 1) & AMASK; /* incr mem addr */ | |
| if ((f == FN_READ) && MEM_ADDR_OK (pa)) /* read? */ | |
| M[pa] = fbuf[rf_da]; | |
| if ((f == FN_WCHK) && (M[pa] != fbuf[rf_da])) { /* write check? */ | |
| rf_updsta (RFS_WCE); /* flag error */ | |
| break; | |
| } | |
| if (f == FN_WRITE) { /* write? */ | |
| d = (rf_da >> 18) & 07; /* disk */ | |
| t = (rf_da >> 14) & 017; /* track groups */ | |
| if ((rf_wlk[d] >> t) & 1) { /* write locked? */ | |
| rf_updsta (RFS_WLO); | |
| break; | |
| } | |
| else { /* not locked */ | |
| fbuf[rf_da] = M[pa]; /* write word */ | |
| if (((uint32) rf_da) >= uptr->hwmark) uptr->hwmark = rf_da + 1; | |
| } | |
| } | |
| rf_da = rf_da + 1; /* incr disk addr */ | |
| } while ((M[RF_WC] != 0) && (rf_burst != 0)); /* brk if wc, no brst */ | |
| if ((M[RF_WC] != 0) && ((rf_sta & RFS_ERR) == 0)) /* more to do? */ | |
| sim_activate (&rf_unit, rf_time); /* sched next */ | |
| else rf_updsta (RFS_DON); | |
| return SCPE_OK; | |
| } | |
| /* Update status */ | |
| int32 rf_updsta (int32 new) | |
| { | |
| rf_sta = (rf_sta | new) & ~(RFS_ERR | RFS_CLR); | |
| if (rf_sta & RFS_EFLGS) rf_sta = rf_sta | RFS_ERR; | |
| if ((rf_sta & (RFS_ERR | RFS_DON)) && (rf_sta & RFS_IE)) | |
| SET_INT (RF); | |
| else CLR_INT (RF); | |
| return rf_sta; | |
| } | |
| /* Reset routine */ | |
| t_stat rf_reset (DEVICE *dptr) | |
| { | |
| rf_sta = rf_da = rf_dbuf = 0; | |
| rf_updsta (0); | |
| sim_cancel (&rf_unit); | |
| return SCPE_OK; | |
| } | |
| /* IORS routine */ | |
| int32 rf_iors (void) | |
| { | |
| return ((rf_sta & (RFS_ERR | RFS_DON))? IOS_RF: 0); | |
| } | |
| /* Attach routine */ | |
| t_stat rf_attach (UNIT *uptr, char *cptr) | |
| { | |
| uint32 p, sz; | |
| uint32 ds_bytes = RF_DKSIZE * sizeof (int32); | |
| if ((uptr->flags & UNIT_AUTO) && (sz = sim_fsize_name (cptr))) { | |
| p = (sz + ds_bytes - 1) / ds_bytes; | |
| if (p >= RF_NUMDK) p = RF_NUMDK - 1; | |
| uptr->flags = (uptr->flags & ~UNIT_PLAT) | | |
| (p << UNIT_V_PLAT); | |
| } | |
| uptr->capac = UNIT_GETP (uptr->flags) * RF_DKSIZE; | |
| return attach_unit (uptr, cptr); | |
| } | |
| /* Change disk size */ | |
| t_stat rf_set_size (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| if (val < 0) return SCPE_IERR; | |
| if (uptr->flags & UNIT_ATT) return SCPE_ALATT; | |
| uptr->capac = UNIT_GETP (val) * RF_DKSIZE; | |
| uptr->flags = uptr->flags & ~UNIT_AUTO; | |
| return SCPE_OK; | |
| } |