| /* pdp8_rx.c: RX8E/RX01, RX28/RX02 floppy disk simulator | |
| Copyright (c) 1993-2005, 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. | |
| rx RX8E/RX01, RX28/RX02 floppy disk | |
| 04-Jan-04 RMS Changed sim_fsize calling sequence | |
| 05-Nov-03 RMS Fixed bug in RX28 read status (found by Charles Dickman) | |
| 26-Oct-03 RMS Cleaned up buffer copy code, fixed double density write | |
| 25-Apr-03 RMS Revised for extended file support | |
| 14-Mar-03 RMS Fixed variable size interaction with save/restore | |
| 03-Mar-03 RMS Fixed autosizing | |
| 08-Oct-02 RMS Added DIB, device number support | |
| Fixed reset to work with disabled device | |
| 15-Sep-02 RMS Added RX28/RX02 support | |
| 06-Jan-02 RMS Changed enable/disable support | |
| 30-Nov-01 RMS Added read only unit, extended SET/SHOW support | |
| 24-Nov-01 RMS Converted FLG to array | |
| 17-Jul-01 RMS Fixed warning from VC++ 6 | |
| 26-Apr-01 RMS Added device enable/disable support | |
| 13-Apr-01 RMS Revised for register arrays | |
| 14-Apr-99 RMS Changed t_addr to unsigned | |
| 15-Aug-96 RMS Fixed bug in LCD | |
| An RX01 diskette consists of 77 tracks, each with 26 sectors of 128B. | |
| An RX02 diskette consists of 77 tracks, each with 26 sectors of 128B | |
| (single density) or 256B (double density). Tracks are numbered 0-76, | |
| sectors 1-26. The RX8E (RX28) can store data in 8b mode or 12b mode. | |
| In 8b mode, the controller reads or writes 128 bytes (128B or 256B) | |
| per sector. In 12b mode, it reads or writes 64 (64 or 128) 12b words | |
| per sector. The 12b words are bit packed into the first 96 (192) bytes | |
| of the sector; the last 32 (64) bytes are zeroed on writes. | |
| */ | |
| #include "pdp8_defs.h" | |
| #define RX_NUMTR 77 /* tracks/disk */ | |
| #define RX_M_TRACK 0377 | |
| #define RX_NUMSC 26 /* sectors/track */ | |
| #define RX_M_SECTOR 0177 /* cf Jones!! */ | |
| #define RX_NUMBY 128 /* bytes/sector */ | |
| #define RX2_NUMBY 256 | |
| #define RX_NUMWD (RX_NUMBY / 2) /* words/sector */ | |
| #define RX2_NUMWD (RX2_NUMBY / 2) | |
| #define RX_SIZE (RX_NUMTR * RX_NUMSC * RX_NUMBY) /* bytes/disk */ | |
| #define RX2_SIZE (RX_NUMTR * RX_NUMSC * RX2_NUMBY) | |
| #define RX_NUMDR 2 /* drives/controller */ | |
| #define RX_M_NUMDR 01 | |
| #define UNIT_V_WLK (UNIT_V_UF + 0) /* write locked */ | |
| #define UNIT_V_DEN (UNIT_V_UF + 1) /* double density */ | |
| #define UNIT_V_AUTO (UNIT_V_UF + 2) /* autosize */ | |
| #define UNIT_WLK (1u << UNIT_V_WLK) | |
| #define UNIT_DEN (1u << UNIT_V_DEN) | |
| #define UNIT_AUTO (1u << UNIT_V_AUTO) | |
| #define UNIT_WPRT (UNIT_WLK | UNIT_RO) /* write protect */ | |
| #define IDLE 0 /* idle state */ | |
| #define CMD8 1 /* 8b cmd, ho next */ | |
| #define RWDS 2 /* rw, sect next */ | |
| #define RWDT 3 /* rw, track next */ | |
| #define RWXFR 4 /* rw, transfer */ | |
| #define FILL 5 /* fill buffer */ | |
| #define EMPTY 6 /* empty buffer */ | |
| #define SDCNF 7 /* set dens, conf next */ | |
| #define SDXFR 8 /* set dens, transfer */ | |
| #define CMD_COMPLETE 9 /* set done next */ | |
| #define INIT_COMPLETE 10 /* init compl next */ | |
| #define RXCS_V_FUNC 1 /* function */ | |
| #define RXCS_M_FUNC 7 | |
| #define RXCS_FILL 0 /* fill buffer */ | |
| #define RXCS_EMPTY 1 /* empty buffer */ | |
| #define RXCS_WRITE 2 /* write sector */ | |
| #define RXCS_READ 3 /* read sector */ | |
| #define RXCS_SDEN 4 /* set density (RX28) */ | |
| #define RXCS_RXES 5 /* read status */ | |
| #define RXCS_WRDEL 6 /* write del data */ | |
| #define RXCS_ECODE 7 /* read error code */ | |
| #define RXCS_DRV 0020 /* drive */ | |
| #define RXCS_MODE 0100 /* mode */ | |
| #define RXCS_MAINT 0200 /* maintenance */ | |
| #define RXCS_DEN 0400 /* density (RX28) */ | |
| #define RXCS_GETFNC(x) (((x) >> RXCS_V_FUNC) & RXCS_M_FUNC) | |
| #define RXES_CRC 0001 /* CRC error NI */ | |
| #define RXES_ID 0004 /* init done */ | |
| #define RXES_RX02 0010 /* RX02 (RX28) */ | |
| #define RXES_DERR 0020 /* density err (RX28) */ | |
| #define RXES_DEN 0040 /* density (RX28) */ | |
| #define RXES_DD 0100 /* deleted data */ | |
| #define RXES_DRDY 0200 /* drive ready */ | |
| #define TRACK u3 /* current track */ | |
| #define READ_RXDBR ((rx_csr & RXCS_MODE)? AC | (rx_dbr & 0377): rx_dbr) | |
| #define CALC_DA(t,s,b) (((t) * RX_NUMSC) + ((s) - 1)) * b | |
| extern int32 int_req, int_enable, dev_done; | |
| int32 rx_28 = 0; /* controller type */ | |
| int32 rx_tr = 0; /* xfer ready flag */ | |
| int32 rx_err = 0; /* error flag */ | |
| int32 rx_csr = 0; /* control/status */ | |
| int32 rx_dbr = 0; /* data buffer */ | |
| int32 rx_esr = 0; /* error status */ | |
| int32 rx_ecode = 0; /* error code */ | |
| int32 rx_track = 0; /* desired track */ | |
| int32 rx_sector = 0; /* desired sector */ | |
| int32 rx_state = IDLE; /* controller state */ | |
| int32 rx_cwait = 100; /* command time */ | |
| int32 rx_swait = 10; /* seek, per track */ | |
| int32 rx_xwait = 1; /* tr set time */ | |
| int32 rx_stopioe = 0; /* stop on error */ | |
| uint8 rx_buf[RX2_NUMBY] = { 0 }; /* sector buffer */ | |
| int32 rx_bptr = 0; /* buffer pointer */ | |
| DEVICE rx_dev; | |
| int32 rx (int32 IR, int32 AC); | |
| t_stat rx_svc (UNIT *uptr); | |
| t_stat rx_reset (DEVICE *dptr); | |
| t_stat rx_boot (int32 unitno, DEVICE *dptr); | |
| t_stat rx_set_size (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| t_stat rx_attach (UNIT *uptr, char *cptr); | |
| void rx_cmd (void); | |
| void rx_done (int32 esr_flags, int32 new_ecode); | |
| t_stat rx_settype (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| t_stat rx_showtype (FILE *st, UNIT *uptr, int32 val, void *desc); | |
| /* RX8E data structures | |
| rx_dev RX device descriptor | |
| rx_unit RX unit list | |
| rx_reg RX register list | |
| rx_mod RX modifier list | |
| */ | |
| DIB rx_dib = { DEV_RX, 1, { &rx } }; | |
| UNIT rx_unit[] = { | |
| { UDATA (&rx_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_BUFABLE+UNIT_MUSTBUF+ | |
| UNIT_ROABLE, RX_SIZE) }, | |
| { UDATA (&rx_svc, UNIT_FIX+UNIT_ATTABLE+UNIT_BUFABLE+UNIT_MUSTBUF+ | |
| UNIT_ROABLE, RX_SIZE) } | |
| }; | |
| REG rx_reg[] = { | |
| { ORDATA (RXCS, rx_csr, 12) }, | |
| { ORDATA (RXDB, rx_dbr, 12) }, | |
| { ORDATA (RXES, rx_esr, 12) }, | |
| { ORDATA (RXERR, rx_ecode, 8) }, | |
| { ORDATA (RXTA, rx_track, 8) }, | |
| { ORDATA (RXSA, rx_sector, 8) }, | |
| { DRDATA (STAPTR, rx_state, 4), REG_RO }, | |
| { DRDATA (BUFPTR, rx_bptr, 8) }, | |
| { FLDATA (TR, rx_tr, 0) }, | |
| { FLDATA (ERR, rx_err, 0) }, | |
| { FLDATA (DONE, dev_done, INT_V_RX) }, | |
| { FLDATA (ENABLE, int_enable, INT_V_RX) }, | |
| { FLDATA (INT, int_req, INT_V_RX) }, | |
| { DRDATA (CTIME, rx_cwait, 24), PV_LEFT }, | |
| { DRDATA (STIME, rx_swait, 24), PV_LEFT }, | |
| { DRDATA (XTIME, rx_xwait, 24), PV_LEFT }, | |
| { FLDATA (STOP_IOE, rx_stopioe, 0) }, | |
| { BRDATA (SBUF, rx_buf, 8, 8, RX2_NUMBY) }, | |
| { FLDATA (RX28, rx_28, 0), REG_HRO }, | |
| { URDATA (CAPAC, rx_unit[0].capac, 10, T_ADDR_W, 0, | |
| RX_NUMDR, REG_HRO | PV_LEFT) }, | |
| { ORDATA (DEVNUM, rx_dib.dev, 6), REG_HRO }, | |
| { NULL } | |
| }; | |
| MTAB rx_mod[] = { | |
| { UNIT_WLK, 0, "write enabled", "WRITEENABLED", NULL }, | |
| { UNIT_WLK, UNIT_WLK, "write locked", "LOCKED", NULL }, | |
| { MTAB_XTD | MTAB_VDV, 1, NULL, "RX28", &rx_settype, NULL, NULL }, | |
| { MTAB_XTD | MTAB_VDV, 0, NULL, "RX8E", &rx_settype, NULL, NULL }, | |
| { MTAB_XTD | MTAB_VDV, 0, "TYPE", NULL, NULL, &rx_showtype, NULL }, | |
| { (UNIT_DEN+UNIT_ATT), UNIT_ATT, "single density", NULL, NULL }, | |
| { (UNIT_DEN+UNIT_ATT), (UNIT_DEN+UNIT_ATT), "double density", NULL, NULL }, | |
| { (UNIT_AUTO+UNIT_DEN+UNIT_ATT), 0, "single density", NULL, NULL }, | |
| { (UNIT_AUTO+UNIT_DEN+UNIT_ATT), UNIT_DEN, "double density", NULL, NULL }, | |
| { (UNIT_AUTO+UNIT_ATT), UNIT_AUTO, "autosize", NULL, NULL }, | |
| { UNIT_AUTO, UNIT_AUTO, NULL, "AUTOSIZE", NULL }, | |
| { (UNIT_AUTO+UNIT_DEN), 0, NULL, "SINGLE", &rx_set_size }, | |
| { (UNIT_AUTO+UNIT_DEN), UNIT_DEN, NULL, "DOUBLE", &rx_set_size }, | |
| { MTAB_XTD|MTAB_VDV, 0, "DEVNO", "DEVNO", | |
| &set_dev, &show_dev, NULL }, | |
| { 0 } | |
| }; | |
| DEVICE rx_dev = { | |
| "RX", rx_unit, rx_reg, rx_mod, | |
| RX_NUMDR, 8, 20, 1, 8, 8, | |
| NULL, NULL, &rx_reset, | |
| &rx_boot, &rx_attach, NULL, | |
| &rx_dib, DEV_DISABLE | |
| }; | |
| /* IOT routine */ | |
| int32 rx (int32 IR, int32 AC) | |
| { | |
| int32 drv = ((rx_csr & RXCS_DRV)? 1: 0); /* get drive number */ | |
| switch (IR & 07) { /* decode IR<9:11> */ | |
| case 0: /* unused */ | |
| break; | |
| case 1: /* LCD */ | |
| if (rx_state != IDLE) return AC; /* ignore if busy */ | |
| dev_done = dev_done & ~INT_RX; /* clear done, int */ | |
| int_req = int_req & ~INT_RX; | |
| rx_tr = rx_err = 0; /* clear flags */ | |
| rx_bptr = 0; /* clear buf pointer */ | |
| if (rx_28 && (AC & RXCS_MODE)) { /* RX28 8b mode? */ | |
| rx_dbr = rx_csr = AC & 0377; /* save 8b */ | |
| rx_tr = 1; /* xfer is ready */ | |
| rx_state = CMD8; /* wait for part 2 */ | |
| } | |
| else { | |
| rx_dbr = rx_csr = AC; /* save new command */ | |
| rx_cmd (); /* issue command */ | |
| } | |
| return 0; /* clear AC */ | |
| case 2: /* XDR */ | |
| switch (rx_state & 017) { /* case on state */ | |
| case EMPTY: /* emptying buffer */ | |
| sim_activate (&rx_unit[drv], rx_xwait); /* sched xfer */ | |
| return READ_RXDBR; /* return data reg */ | |
| case CMD8: /* waiting for cmd */ | |
| rx_dbr = AC & 0377; | |
| rx_csr = (rx_csr & 0377) | ((AC & 017) << 8); | |
| rx_cmd (); | |
| break; | |
| case RWDS:case RWDT:case FILL:case SDCNF: /* waiting for data */ | |
| rx_dbr = AC; /* save data */ | |
| sim_activate (&rx_unit[drv], rx_xwait); /* schedule */ | |
| break; | |
| default: /* default */ | |
| return READ_RXDBR; /* return data reg */ | |
| } | |
| break; | |
| case 3: /* STR */ | |
| if (rx_tr != 0) { | |
| rx_tr = 0; | |
| return IOT_SKP + AC; | |
| } | |
| break; | |
| case 4: /* SER */ | |
| if (rx_err != 0) { | |
| rx_err = 0; | |
| return IOT_SKP + AC; | |
| } | |
| break; | |
| case 5: /* SDN */ | |
| if ((dev_done & INT_RX) != 0) { | |
| dev_done = dev_done & ~INT_RX; | |
| int_req = int_req & ~INT_RX; | |
| return IOT_SKP + AC; | |
| } | |
| break; | |
| case 6: /* INTR */ | |
| if (AC & 1) int_enable = int_enable | INT_RX; | |
| else int_enable = int_enable & ~INT_RX; | |
| int_req = INT_UPDATE; | |
| break; | |
| case 7: /* INIT */ | |
| rx_reset (&rx_dev); /* reset device */ | |
| break; | |
| } /* end case pulse */ | |
| return AC; | |
| } | |
| void rx_cmd (void) | |
| { | |
| int32 drv = ((rx_csr & RXCS_DRV)? 1: 0); /* get drive number */ | |
| switch (RXCS_GETFNC (rx_csr)) { /* decode command */ | |
| case RXCS_FILL: | |
| rx_state = FILL; /* state = fill */ | |
| rx_tr = 1; /* xfer is ready */ | |
| rx_esr = rx_esr & RXES_ID; /* clear errors */ | |
| break; | |
| case RXCS_EMPTY: | |
| rx_state = EMPTY; /* state = empty */ | |
| rx_esr = rx_esr & RXES_ID; /* clear errors */ | |
| sim_activate (&rx_unit[drv], rx_xwait); /* sched xfer */ | |
| break; | |
| case RXCS_READ: case RXCS_WRITE: case RXCS_WRDEL: | |
| rx_state = RWDS; /* state = get sector */ | |
| rx_tr = 1; /* xfer is ready */ | |
| rx_esr = rx_esr & RXES_ID; /* clear errors */ | |
| break; | |
| case RXCS_SDEN: | |
| if (rx_28) { /* RX28? */ | |
| rx_state = SDCNF; /* state = get conf */ | |
| rx_tr = 1; /* xfer is ready */ | |
| rx_esr = rx_esr & RXES_ID; /* clear errors */ | |
| break; | |
| } /* else fall thru */ | |
| default: | |
| rx_state = CMD_COMPLETE; /* state = cmd compl */ | |
| sim_activate (&rx_unit[drv], rx_cwait); /* sched done */ | |
| break; | |
| } /* end switch func */ | |
| return; | |
| } | |
| /* Unit service; the action to be taken depends on the transfer state: | |
| IDLE Should never get here | |
| RWDS Save sector, set TR, set RWDT | |
| RWDT Save track, set RWXFR | |
| RWXFR Read/write buffer | |
| FILL copy dbr to rx_buf[rx_bptr], advance ptr | |
| if rx_bptr > max, finish command, else set tr | |
| EMPTY if rx_bptr > max, finish command, else | |
| copy rx_buf[rx_bptr] to dbr, advance ptr, set tr | |
| CMD_COMPLETE copy requested data to dbr, finish command | |
| INIT_COMPLETE read drive 0, track 1, sector 1 to buffer, finish command | |
| For RWDT and CMD_COMPLETE, the input argument is the selected drive; | |
| otherwise, it is drive 0. | |
| */ | |
| t_stat rx_svc (UNIT *uptr) | |
| { | |
| int32 i, func, byptr, bps, wps; | |
| int8 *fbuf = uptr->filebuf; | |
| uint32 da; | |
| #define PTR12(x) (((x) + (x) + (x)) >> 1) | |
| if (rx_28 && (uptr->flags & UNIT_DEN)) /* RX28 and double density? */ | |
| bps = RX2_NUMBY; /* double bytes/sector */ | |
| else bps = RX_NUMBY; /* RX8E, normal count */ | |
| wps = bps / 2; | |
| func = RXCS_GETFNC (rx_csr); /* get function */ | |
| switch (rx_state) { /* case on state */ | |
| case IDLE: /* idle */ | |
| return SCPE_IERR; | |
| case EMPTY: /* empty buffer */ | |
| if (rx_csr & RXCS_MODE) { /* 8b xfer? */ | |
| if (rx_bptr >= bps) { /* done? */ | |
| rx_done (0, 0); /* set done */ | |
| break; /* and exit */ | |
| } | |
| rx_dbr = rx_buf[rx_bptr]; /* else get data */ | |
| } | |
| else { | |
| byptr = PTR12 (rx_bptr); /* 12b xfer */ | |
| if (rx_bptr >= wps) { /* done? */ | |
| rx_done (0, 0); /* set done */ | |
| break; /* and exit */ | |
| } | |
| rx_dbr = (rx_bptr & 1)? /* get data */ | |
| ((rx_buf[byptr] & 017) << 8) | rx_buf[byptr + 1]: | |
| (rx_buf[byptr] << 4) | ((rx_buf[byptr + 1] >> 4) & 017); | |
| } | |
| rx_bptr = rx_bptr + 1; | |
| rx_tr = 1; | |
| break; | |
| case FILL: /* fill buffer */ | |
| if (rx_csr & RXCS_MODE) { /* 8b xfer? */ | |
| rx_buf[rx_bptr] = rx_dbr; /* fill buffer */ | |
| rx_bptr = rx_bptr + 1; | |
| if (rx_bptr < bps) rx_tr = 1; /* if more, set xfer */ | |
| else rx_done (0, 0); /* else done */ | |
| } | |
| else { | |
| byptr = PTR12 (rx_bptr); /* 12b xfer */ | |
| if (rx_bptr & 1) { /* odd or even? */ | |
| rx_buf[byptr] = (rx_buf[byptr] & 0360) | ((rx_dbr >> 8) & 017); | |
| rx_buf[byptr + 1] = rx_dbr & 0377; | |
| } | |
| else { | |
| rx_buf[byptr] = (rx_dbr >> 4) & 0377; | |
| rx_buf[byptr + 1] = (rx_dbr & 017) << 4; | |
| } | |
| rx_bptr = rx_bptr + 1; | |
| if (rx_bptr < wps) rx_tr = 1; /* if more, set xfer */ | |
| else { | |
| for (i = PTR12 (wps); i < bps; i++) | |
| rx_buf[i] = 0; /* else fill sector */ | |
| rx_done (0, 0); /* set done */ | |
| } | |
| } | |
| break; | |
| case RWDS: /* wait for sector */ | |
| rx_sector = rx_dbr & RX_M_SECTOR; /* save sector */ | |
| rx_tr = 1; /* set xfer ready */ | |
| rx_state = RWDT; /* advance state */ | |
| return SCPE_OK; | |
| case RWDT: /* wait for track */ | |
| rx_track = rx_dbr & RX_M_TRACK; /* save track */ | |
| rx_state = RWXFR; | |
| sim_activate (uptr, /* sched done */ | |
| rx_swait * abs (rx_track - uptr->TRACK)); | |
| return SCPE_OK; | |
| case RWXFR: /* transfer */ | |
| if ((uptr->flags & UNIT_BUF) == 0) { /* not buffered? */ | |
| rx_done (0, 0110); /* done, error */ | |
| return IORETURN (rx_stopioe, SCPE_UNATT); | |
| } | |
| if (rx_track >= RX_NUMTR) { /* bad track? */ | |
| rx_done (0, 0040); /* done, error */ | |
| break; | |
| } | |
| uptr->TRACK = rx_track; /* now on track */ | |
| if ((rx_sector == 0) || (rx_sector > RX_NUMSC)) { /* bad sect? */ | |
| rx_done (0, 0070); /* done, error */ | |
| break; | |
| } | |
| if (rx_28 && /* RX28? */ | |
| (((uptr->flags & UNIT_DEN) != 0) ^ | |
| ((rx_csr & RXCS_DEN) != 0))) { /* densities agree? */ | |
| rx_done (RXES_DERR, 0240); /* no, error */ | |
| break; | |
| } | |
| da = CALC_DA (rx_track, rx_sector, bps); /* get disk address */ | |
| if (func == RXCS_WRDEL) rx_esr = rx_esr | RXES_DD; /* del data? */ | |
| if (func == RXCS_READ) { /* read? */ | |
| for (i = 0; i < bps; i++) rx_buf[i] = fbuf[da + i]; | |
| } | |
| else { /* write */ | |
| if (uptr->flags & UNIT_WPRT) { /* locked? */ | |
| rx_done (0, 0100); /* done, error */ | |
| break; | |
| } | |
| for (i = 0; i < bps; i++) fbuf[da + i] = rx_buf[i]; | |
| da = da + bps; | |
| if (da > uptr->hwmark) uptr->hwmark = da; | |
| } | |
| rx_done (0, 0); /* done */ | |
| break; | |
| case SDCNF: /* confirm set density */ | |
| if ((rx_dbr & 0377) != 0111) { /* confirmed? */ | |
| rx_done (0, 0250); /* no, error */ | |
| break; | |
| } | |
| rx_state = SDXFR; /* next state */ | |
| sim_activate (uptr, rx_cwait * 100); /* schedule operation */ | |
| break; | |
| case SDXFR: /* erase disk */ | |
| for (i = 0; i < (int32) uptr->capac; i++) fbuf[i] = 0; | |
| uptr->hwmark = uptr->capac; | |
| if (rx_csr & RXCS_DEN) uptr->flags = uptr->flags | UNIT_DEN; | |
| else uptr->flags = uptr->flags & ~UNIT_DEN; | |
| rx_done (0, 0); | |
| break; | |
| case CMD_COMPLETE: /* command complete */ | |
| if (func == RXCS_ECODE) { /* read ecode? */ | |
| rx_dbr = rx_ecode; /* set dbr */ | |
| rx_done (0, -1); /* don't update */ | |
| } | |
| else if (rx_28) { /* no, read sta; RX28? */ | |
| rx_esr = rx_esr & ~RXES_DERR; /* assume dens match */ | |
| if (((uptr->flags & UNIT_DEN) != 0) ^ /* densities mismatch? */ | |
| ((rx_csr & RXCS_DEN) != 0)) | |
| rx_done (RXES_DERR, 0240); /* yes, error */ | |
| else rx_done (0, 0); /* no, ok */ | |
| } | |
| else rx_done (0, 0); /* RX8E status */ | |
| break; | |
| case INIT_COMPLETE: /* init complete */ | |
| rx_unit[0].TRACK = 1; /* drive 0 to trk 1 */ | |
| rx_unit[1].TRACK = 0; /* drive 1 to trk 0 */ | |
| if ((rx_unit[0].flags & UNIT_BUF) == 0) { /* not buffered? */ | |
| rx_done (RXES_ID, 0010); /* init done, error */ | |
| break; | |
| } | |
| da = CALC_DA (1, 1, bps); /* track 1, sector 1 */ | |
| for (i = 0; i < bps; i++) /* read sector */ | |
| rx_buf[i] = fbuf[da + i]; | |
| rx_done (RXES_ID, 0); /* set done */ | |
| if ((rx_unit[1].flags & UNIT_ATT) == 0) rx_ecode = 0020; | |
| break; | |
| } /* end case state */ | |
| return SCPE_OK; | |
| } | |
| /* Command complete. Set done and put final value in interface register, | |
| return to IDLE state. | |
| */ | |
| void rx_done (int32 esr_flags, int32 new_ecode) | |
| { | |
| int32 drv = (rx_csr & RXCS_DRV)? 1: 0; | |
| rx_state = IDLE; /* now idle */ | |
| dev_done = dev_done | INT_RX; /* set done */ | |
| int_req = INT_UPDATE; /* update ints */ | |
| rx_esr = (rx_esr | esr_flags) & ~(RXES_DRDY|RXES_RX02|RXES_DEN); | |
| if (rx_28) rx_esr = rx_esr | RXES_RX02; /* RX28? */ | |
| if (rx_unit[drv].flags & UNIT_ATT) { /* update drv rdy */ | |
| rx_esr = rx_esr | RXES_DRDY; | |
| if (rx_unit[drv].flags & UNIT_DEN) /* update density */ | |
| rx_esr = rx_esr | RXES_DEN; | |
| } | |
| if (new_ecode > 0) rx_err = 1; /* test for error */ | |
| if (new_ecode < 0) return; /* don't update? */ | |
| rx_ecode = new_ecode; /* update ecode */ | |
| rx_dbr = rx_esr; /* update RXDB */ | |
| return; | |
| } | |
| /* Reset routine. The RX is one of the few devices that schedules | |
| an I/O transfer as part of its initialization */ | |
| t_stat rx_reset (DEVICE *dptr) | |
| { | |
| rx_dbr = rx_csr = 0; /* 12b mode, drive 0 */ | |
| rx_esr = rx_ecode = 0; /* clear error */ | |
| rx_tr = rx_err = 0; /* clear flags */ | |
| rx_track = rx_sector = 0; /* clear address */ | |
| rx_state = IDLE; /* ctrl idle */ | |
| dev_done = dev_done & ~INT_RX; /* clear done, int */ | |
| int_req = int_req & ~INT_RX; | |
| int_enable = int_enable & ~INT_RX; | |
| sim_cancel (&rx_unit[1]); /* cancel drive 1 */ | |
| if (dptr->flags & DEV_DIS) sim_cancel (&rx_unit[0]); /* disabled? */ | |
| else if (rx_unit[0].flags & UNIT_BUF) { /* attached? */ | |
| rx_state = INIT_COMPLETE; /* yes, sched init */ | |
| sim_activate (&rx_unit[0], rx_swait * abs (1 - rx_unit[0].TRACK)); | |
| } | |
| else rx_done (rx_esr | RXES_ID, 0010); /* no, error */ | |
| return SCPE_OK; | |
| } | |
| /* Attach routine */ | |
| t_stat rx_attach (UNIT *uptr, char *cptr) | |
| { | |
| uint32 sz; | |
| t_stat r; | |
| r = attach_unit (uptr, cptr); | |
| if (r != SCPE_OK) return r; | |
| if ((uptr->flags & UNIT_AUTO) && (sz = sim_fsize (uptr->fileref))) { | |
| if (sz > RX_SIZE) uptr->flags = uptr->flags | UNIT_DEN; | |
| else uptr->flags = uptr->flags & ~UNIT_DEN; | |
| } | |
| uptr->capac = (uptr->flags & UNIT_DEN)? RX2_SIZE: RX_SIZE; | |
| return SCPE_OK; | |
| } | |
| /* Set size routine */ | |
| t_stat rx_set_size (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| if (uptr->flags & UNIT_ATT) return SCPE_ALATT; | |
| if ((rx_28 == 0) && val) return SCPE_NOFNC; /* not on RX8E */ | |
| uptr->capac = val? RX2_SIZE: RX_SIZE; | |
| return SCPE_OK; | |
| } | |
| /* Set controller type */ | |
| t_stat rx_settype (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| int32 i; | |
| if ((val < 0) || (val > 1) || (cptr != NULL)) return SCPE_ARG; | |
| if (val == rx_28) return SCPE_OK; | |
| for (i = 0; i < RX_NUMDR; i++) { | |
| if (rx_unit[i].flags & UNIT_ATT) return SCPE_ALATT; | |
| } | |
| for (i = 0; i < RX_NUMDR; i++) { | |
| rx_unit[i].flags = rx_unit[i].flags & ~(UNIT_DEN | UNIT_AUTO); | |
| rx_unit[i].capac = RX_SIZE; | |
| if (val) rx_unit[i].flags = rx_unit[i].flags | UNIT_AUTO; | |
| } | |
| rx_28 = val; | |
| return SCPE_OK; | |
| } | |
| /* Show controller type */ | |
| t_stat rx_showtype (FILE *st, UNIT *uptr, int32 val, void *desc) | |
| { | |
| if (rx_28) fprintf (st, "RX28"); | |
| else fprintf (st, "RX8E"); | |
| return SCPE_OK; | |
| } | |
| /* Bootstrap routine */ | |
| #define BOOT_START 022 | |
| #define BOOT_ENTRY 022 | |
| #define BOOT_INST 060 | |
| #define BOOT_LEN (sizeof (boot_rom) / sizeof (int16)) | |
| #define BOOT2_START 020 | |
| #define BOOT2_ENTRY 033 | |
| #define BOOT2_LEN (sizeof (boot2_rom) / sizeof (int16)) | |
| static const uint16 boot_rom[] = { | |
| 06755, /* 22, SDN */ | |
| 05022, /* 23, JMP .-1 */ | |
| 07126, /* 24, CLL CML RTL ; read command + */ | |
| 01060, /* 25, TAD UNIT ; unit no */ | |
| 06751, /* 26, LCD ; load read+unit */ | |
| 07201, /* 27, CLA IAC ; AC = 1 */ | |
| 04053, /* 30, JMS LOAD ; load sector */ | |
| 04053, /* 31, JMS LOAD ; load track */ | |
| 07104, /* 32, CLL RAL ; AC = 2 */ | |
| 06755, /* 33, SDN */ | |
| 05054, /* 34, JMP LOAD+1 */ | |
| 06754, /* 35, SER */ | |
| 07450, /* 36, SNA ; more to do? */ | |
| 07610, /* 37, CLA SKP ; error */ | |
| 05046, /* 40, JMP 46 ; go empty */ | |
| 07402, /* 41-45, HALT ; error */ | |
| 07402, | |
| 07402, | |
| 07402, | |
| 07402, | |
| 06751, /* 46, LCD ; load empty */ | |
| 04053, /* 47, JMS LOAD ; get data */ | |
| 03002, /* 50, DCA 2 ; store */ | |
| 02050, /* 51, ISZ 50 ; incr store */ | |
| 05047, /* 52, JMP 47 ; loop until done */ | |
| 00000, /* LOAD, 0 */ | |
| 06753, /* 54, STR */ | |
| 05033, /* 55, JMP 33 */ | |
| 06752, /* 56, XDR */ | |
| 05453, /* 57, JMP I LOAD */ | |
| 07024, /* UNIT, CML RAL ; for unit 1 */ | |
| 06030 /* 61, KCC */ | |
| }; | |
| static const uint16 boot2_rom[] = { | |
| 01061, /* READ, TAD UNIT ; next unit+den */ | |
| 01046, /* 21, TAD CON360 ; add in 360 */ | |
| 00060, /* 22, AND CON420 ; mask to 420 */ | |
| 03061, /* 23, DCA UNIT ; 400,420,0,20... */ | |
| 07327, /* 24, STL CLA IAC RTL ; AC = 6 = read */ | |
| 01061, /* 25, TAD UNIT ; +unit+den */ | |
| 06751, /* 26, LCD ; load cmd */ | |
| 07201, /* 27, CLA IAC; ; AC = 1 = trksec */ | |
| 04053, /* 30, JMS LOAD ; load trk */ | |
| 04053, /* 31, JMS LOAD ; load sec */ | |
| 07004, /* CN7004, RAL ; AC = 2 = empty */ | |
| 06755, /* START, SDN ; done? */ | |
| 05054, /* 34, JMP LOAD+1 ; check xfr */ | |
| 06754, /* 35, SER ; error? */ | |
| 07450, /* 36, SNA ; AC=0 on start */ | |
| 05020, /* 37, JMP RD ; try next den,un */ | |
| 01061, /* 40, TAD UNIT ; +unit+den */ | |
| 06751, /* 41, LCD ; load cmd */ | |
| 01061, /* 42, TAD UNIT ; set 60 for sec boot */ | |
| 00046, /* 43, AND CON360 ; only density */ | |
| 01032, /* 44, TAD CN7004 ; magic */ | |
| 03060, /* 45, DCA 60 */ | |
| 00360, /* CON360, 360 ; NOP */ | |
| 04053, /* 47, JMS LOAD ; get data */ | |
| 03002, /* 50, DCA 2 ; store */ | |
| 02050, /* 51, ISZ .-1 ; incr store */ | |
| 05047, /* 52, JMP .-3 ; loop until done */ | |
| 00000, /* LOAD, 0 */ | |
| 06753, /* 54, STR ; xfr ready? */ | |
| 05033, /* 55, JMP 33 ; no, chk done */ | |
| 06752, /* 56, XDR ; get word */ | |
| 05453, /* 57, JMP I 53 ; return */ | |
| 00420, /* CON420, 420 ; toggle */ | |
| 00020 /* UNIT, 20 ; unit+density */ | |
| }; | |
| t_stat rx_boot (int32 unitno, DEVICE *dptr) | |
| { | |
| int32 i; | |
| extern int32 saved_PC; | |
| extern uint16 M[]; | |
| if (rx_dib.dev != DEV_RX) return STOP_NOTSTD; /* only std devno */ | |
| if (rx_28) { | |
| for (i = 0; i < BOOT2_LEN; i++) M[BOOT2_START + i] = boot2_rom[i]; | |
| saved_PC = BOOT2_ENTRY; | |
| } | |
| else { | |
| for (i = 0; i < BOOT_LEN; i++) M[BOOT_START + i] = boot_rom[i]; | |
| M[BOOT_INST] = unitno? 07024: 07004; | |
| saved_PC = BOOT_ENTRY; | |
| } | |
| return SCPE_OK; | |
| } |