| /************************************************************************* | |
| * * | |
| * $Id: wd179x.c 1999 2008-07-22 04:25:28Z hharte $ * | |
| * * | |
| * Copyright (c) 2007-2008 Howard M. Harte. * | |
| * http://www.hartetec.com * | |
| * * | |
| * 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 HOWARD M. HARTE 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 Howard M. Harte shall * | |
| * not be used in advertising or otherwise to promote the sale, use or * | |
| * other dealings in this Software without prior written authorization * | |
| * Howard M. Harte. * | |
| * * | |
| * SIMH Interface based on altairz80_hdsk.c, by Peter Schorn. * | |
| * * | |
| * Module Description: * | |
| * Generic WD179X Disk Controller module for SIMH. * | |
| * * | |
| * Environment: * | |
| * User mode only * | |
| * * | |
| *************************************************************************/ | |
| /*#define DBG_MSG */ | |
| #include "altairz80_defs.h" | |
| #if defined (_WIN32) | |
| #include <windows.h> | |
| #endif | |
| #include "sim_imd.h" | |
| #include "wd179x.h" | |
| #ifdef DBG_MSG | |
| #define DBG_PRINT(args) sim_printf args | |
| #else | |
| #define DBG_PRINT(args) | |
| #endif | |
| #define CROMFDC_SIM_100US 291 /* Number of "ticks" in 100uS, where does this come from? */ | |
| #define CROMFDC_8IN_ROT (167 * CROMFDC_SIM_100US) | |
| #define CROMFDC_5IN_ROT (200 * CROMFDC_SIM_100US) | |
| /* Debug flags */ | |
| #define ERROR_MSG (1 << 0) | |
| #define SEEK_MSG (1 << 1) | |
| #define CMD_MSG (1 << 2) | |
| #define RD_DATA_MSG (1 << 3) | |
| #define WR_DATA_MSG (1 << 4) | |
| #define STATUS_MSG (1 << 5) | |
| #define FMT_MSG (1 << 6) | |
| #define VERBOSE_MSG (1 << 7) | |
| #define WD179X_MAX_DRIVES 4 | |
| #define WD179X_SECTOR_LEN 8192 | |
| /* 2^(7 + WD179X_MAX_SEC_LEN) == WD179X_SECTOR_LEN */ | |
| #define WD179X_MAX_SEC_LEN 6 | |
| #define WD179X_MAX_SECTOR 26 | |
| #define CMD_PHASE 0 | |
| #define EXEC_PHASE 1 | |
| #define DATA_PHASE 2 | |
| /* Status Bits for Type I Commands */ | |
| #define WD179X_STAT_NOT_READY (1 << 7) | |
| #define WD179X_STAT_WPROT (1 << 6) | |
| #define WD179X_STAT_HLD (1 << 5) | |
| #define WD179X_STAT_SEEK_ERROR (1 << 4) | |
| #define WD179X_STAT_CRC_ERROR (1 << 3) | |
| #define WD179X_STAT_TRACK0 (1 << 2) | |
| #define WD179X_STAT_INDEX (1 << 1) | |
| #define WD179X_STAT_BUSY (1 << 0) | |
| /* Status Bits for Type II, III Commands */ | |
| /*#define WD179X_STAT_NOT_READY (1 << 7) */ | |
| /*#define WD179X_STAT_WPROT (1 << 6) */ | |
| #define WD179X_STAT_REC_TYPE (1 << 5) /* Also Write Fault */ | |
| #define WD179X_STAT_NOT_FOUND (1 << 4) | |
| /*#define WD179X_STAT_CRC_ERROR (1 << 3) */ | |
| #define WD179X_STAT_LOST_DATA (1 << 2) | |
| #define WD179X_STAT_DRQ (1 << 1) | |
| /*#define WD179X_STAT_BUSY (1 << 0) */ | |
| typedef union { | |
| uint8 raw[WD179X_SECTOR_LEN]; | |
| } SECTOR_FORMAT; | |
| typedef struct { | |
| UNIT *uptr; | |
| DISK_INFO *imd; | |
| uint8 ntracks; /* number of tracks */ | |
| uint8 nheads; /* number of heads */ | |
| uint32 sectsize; /* sector size, not including pre/postamble */ | |
| uint8 track; /* Current Track */ | |
| uint8 ready; /* Is drive ready? */ | |
| } WD179X_DRIVE_INFO; | |
| typedef struct { | |
| PNP_INFO pnp; /* Plug-n-Play Information */ | |
| uint8 intrq; /* WD179X Interrupt Request Output (EOJ) */ | |
| uint8 hld; /* WD179X Head Load Output */ | |
| uint8 drq; /* WD179X DMA Request Output */ | |
| uint8 ddens; /* WD179X Double-Density Input */ | |
| uint8 fdc_head; /* H Head Number */ | |
| uint8 sel_drive; /* Currently selected drive */ | |
| uint8 drivetype; /* 8 or 5 depending on disk type. */ | |
| uint8 fdc_status; /* WD179X Status Register */ | |
| uint8 verify; /* WD179X Type 1 command Verify flag */ | |
| uint8 fdc_data; /* WD179X Data Register */ | |
| uint8 fdc_read; /* TRUE when reading */ | |
| uint8 fdc_write; /* TRUE when writing */ | |
| uint8 fdc_write_track; /* TRUE when writing an entire track */ | |
| uint8 fdc_fmt_state; /* Format track statemachine state */ | |
| uint8 fdc_gap[4]; /* Gap I - Gap IV lengths */ | |
| uint8 fdc_fmt_sector_count; /* sector count for format track */ | |
| uint8 fdc_sectormap[WD179X_MAX_SECTOR]; /* Physical to logical sector map */ | |
| uint8 fdc_header_index; /* Index into header */ | |
| uint8 fdc_read_addr; /* TRUE when READ ADDRESS command is in progress */ | |
| uint8 fdc_multiple; /* TRUE for multi-sector read/write */ | |
| uint16 fdc_datacount; /* Read or Write data remaining transfer length */ | |
| uint16 fdc_dataindex; /* index of current byte in sector data */ | |
| uint8 index_pulse_wait; /* TRUE if waiting for interrupt on next index pulse. */ | |
| uint8 fdc_sector; /* R Record (Sector) */ | |
| uint8 fdc_sec_len; /* N Sector Length */ | |
| int8 step_dir; | |
| uint8 cmdtype; /* Type of current/former command */ | |
| WD179X_DRIVE_INFO drive[WD179X_MAX_DRIVES]; | |
| } WD179X_INFO; | |
| static SECTOR_FORMAT sdata; | |
| extern uint32 PCX; | |
| extern t_stat set_iobase(UNIT *uptr, int32 val, char *cptr, void *desc); | |
| extern t_stat show_iobase(FILE *st, UNIT *uptr, int32 val, void *desc); | |
| extern uint32 sim_map_resource(uint32 baseaddr, uint32 size, uint32 resource_type, | |
| int32 (*routine)(const int32, const int32, const int32), uint8 unmap); | |
| extern int32 find_unit_index (UNIT *uptr); | |
| t_stat wd179x_svc (UNIT *uptr); | |
| /* These are needed for DMA. PIO Mode has not been implemented yet. */ | |
| extern void PutBYTEWrapper(const uint32 Addr, const uint32 Value); | |
| extern uint8 GetBYTEWrapper(const uint32 Addr); | |
| #define UNIT_V_WD179X_WLK (UNIT_V_UF + 0) /* write locked */ | |
| #define UNIT_WD179X_WLK (1 << UNIT_V_WD179X_WLK) | |
| #define UNIT_V_WD179X_VERBOSE (UNIT_V_UF + 1) /* verbose mode, i.e. show error messages */ | |
| #define UNIT_WD179X_VERBOSE (1 << UNIT_V_WD179X_VERBOSE) | |
| #define WD179X_CAPACITY (77*2*16*256) /* Default Micropolis Disk Capacity */ | |
| #define WD179X_CAPACITY_SSSD (77*1*26*128) /* Single-sided Single Density IBM Diskette1 */ | |
| /* Write Track (format) Statemachine states */ | |
| #define FMT_GAP1 1 | |
| #define FMT_GAP2 2 | |
| #define FMT_GAP3 3 | |
| #define FMT_GAP4 4 | |
| #define FMT_HEADER 5 | |
| #define FMT_DATA 6 | |
| /* WD179X Commands */ | |
| #define WD179X_RESTORE 0x00 /* Type I */ | |
| #define WD179X_SEEK 0x10 /* Type I */ | |
| #define WD179X_STEP 0x20 /* Type I */ | |
| #define WD179X_STEP_U 0x30 /* Type I */ | |
| #define WD179X_STEP_IN 0x40 /* Type I */ | |
| #define WD179X_STEP_IN_U 0x50 /* Type I */ | |
| #define WD179X_STEP_OUT 0x60 /* Type I */ | |
| #define WD179X_STEP_OUT_U 0x70 /* Type I */ | |
| #define WD179X_READ_REC 0x80 /* Type II */ | |
| #define WD179X_READ_RECS 0x90 /* Type II */ | |
| #define WD179X_WRITE_REC 0xA0 /* Type II */ | |
| #define WD179X_WRITE_RECS 0xB0 /* Type II */ | |
| #define WD179X_READ_ADDR 0xC0 /* Type III */ | |
| #define WD179X_FORCE_INTR 0xD0 /* Type IV */ | |
| #define WD179X_READ_TRACK 0xE0 /* Type III */ | |
| #define WD179X_WRITE_TRACK 0xF0 /* Type III */ | |
| static int32 wd179xdev(const int32 port, const int32 io, const int32 data); | |
| static t_stat wd179x_reset(DEVICE *dptr); | |
| static const char* wd179x_description(DEVICE *dptr); | |
| uint8 floorlog2(unsigned int n); | |
| WD179X_INFO wd179x_info_data = { { 0x0, 0, 0x30, 4 } }; | |
| WD179X_INFO *wd179x_info = &wd179x_info_data; | |
| WD179X_INFO_PUB *wd179x_infop = (WD179X_INFO_PUB *)&wd179x_info_data; | |
| static UNIT wd179x_unit[] = { | |
| { UDATA (&wd179x_svc, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, WD179X_CAPACITY), 58200 }, | |
| { UDATA (&wd179x_svc, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, WD179X_CAPACITY), 58200 }, | |
| { UDATA (&wd179x_svc, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, WD179X_CAPACITY), 58200 }, | |
| { UDATA (&wd179x_svc, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, WD179X_CAPACITY), 58200 } | |
| }; | |
| #define WD179X_NAME "Western Digital FDC Core" | |
| static const char* wd179x_description(DEVICE *dptr) { | |
| return WD179X_NAME; | |
| } | |
| static MTAB wd179x_mod[] = { | |
| { MTAB_XTD|MTAB_VDV, 0, "IOBASE", "IOBASE", | |
| &set_iobase, &show_iobase, NULL, "Sets disk controller I/O base address" }, | |
| { UNIT_WD179X_WLK, 0, "WRTENB", "WRTENB", | |
| NULL, NULL, NULL, "Enables " WD179X_NAME "n for writing" }, | |
| { UNIT_WD179X_WLK, UNIT_WD179X_WLK, "WRTLCK", "WRTLCK", | |
| NULL, NULL, NULL, "Locks " WD179X_NAME "n for writing" }, | |
| /* quiet, no warning messages */ | |
| { UNIT_WD179X_VERBOSE, 0, "QUIET", "QUIET", | |
| NULL, NULL, NULL, "No verbose messages for unit " WD179X_NAME "n" }, | |
| /* verbose, show warning messages */ | |
| { UNIT_WD179X_VERBOSE, UNIT_WD179X_VERBOSE, "VERBOSE", "VERBOSE", | |
| NULL, NULL, NULL, "Verbose messages for unit " WD179X_NAME "n" }, | |
| { 0 } | |
| }; | |
| /* Debug Flags */ | |
| static DEBTAB wd179x_dt[] = { | |
| { "ERROR", ERROR_MSG, "Error messages" }, | |
| { "SEEK", SEEK_MSG, "Seek messages" }, | |
| { "CMD", CMD_MSG, "Command messages" }, | |
| { "READ", RD_DATA_MSG, "Read messages" }, | |
| { "WRITE", WR_DATA_MSG, "Write messages" }, | |
| { "STATUS", STATUS_MSG, "Status messages" }, | |
| { "FMT", FMT_MSG, "Format messages" }, | |
| { "VERBOSE", VERBOSE_MSG, "Verbose messages" }, | |
| { NULL, 0 } | |
| }; | |
| DEVICE wd179x_dev = { | |
| "WD179X", wd179x_unit, NULL, wd179x_mod, | |
| WD179X_MAX_DRIVES, 10, 31, 1, WD179X_MAX_DRIVES, WD179X_MAX_DRIVES, | |
| NULL, NULL, &wd179x_reset, | |
| NULL, &wd179x_attach, &wd179x_detach, | |
| &wd179x_info_data, (DEV_DISABLE | DEV_DIS | DEV_DEBUG), ERROR_MSG, | |
| wd179x_dt, NULL, NULL, NULL, NULL, NULL, &wd179x_description | |
| }; | |
| /* Unit service routine */ | |
| /* Used to generate INDEX pulses in response to a FORCE_INTR command */ | |
| t_stat wd179x_svc (UNIT *uptr) | |
| { | |
| if(wd179x_info->index_pulse_wait == TRUE) { | |
| wd179x_info->index_pulse_wait = FALSE; | |
| wd179x_info->intrq = 1; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Reset routine */ | |
| static t_stat wd179x_reset(DEVICE *dptr) | |
| { | |
| PNP_INFO *pnp = (PNP_INFO *)dptr->ctxt; | |
| if(dptr->flags & DEV_DIS) { /* Disconnect I/O Ports */ | |
| sim_map_resource(pnp->io_base, pnp->io_size, RESOURCE_TYPE_IO, &wd179xdev, TRUE); | |
| } else { | |
| /* Connect I/O Ports at base address */ | |
| if(sim_map_resource(pnp->io_base, pnp->io_size, RESOURCE_TYPE_IO, &wd179xdev, FALSE) != 0) { | |
| sim_printf("%s: error mapping I/O resource at 0x%04x\n", __FUNCTION__, pnp->io_base); | |
| return SCPE_ARG; | |
| } | |
| } | |
| return SCPE_OK; | |
| } | |
| void wd179x_external_restore(void) | |
| { | |
| WD179X_DRIVE_INFO *pDrive; | |
| if(wd179x_info->sel_drive >= WD179X_MAX_DRIVES) { | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " Illegal drive selected, cannot restore.\n", PCX); | |
| return; | |
| } | |
| pDrive = &wd179x_info->drive[wd179x_info->sel_drive]; | |
| if(pDrive->uptr == NULL) { | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " No drive selected, cannot restore.\n", PCX); | |
| return; | |
| } | |
| sim_debug(SEEK_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " External Restore drive to track 0\n", wd179x_info->sel_drive, PCX); | |
| pDrive->track = 0; | |
| } | |
| /* Attach routine */ | |
| t_stat wd179x_attach(UNIT *uptr, char *cptr) | |
| { | |
| char header[4]; | |
| t_stat r; | |
| int32 i = 0; | |
| r = attach_unit(uptr, cptr); /* attach unit */ | |
| if ( r != SCPE_OK) /* error? */ | |
| return r; | |
| /* Determine length of this disk */ | |
| uptr->capac = sim_fsize(uptr->fileref); | |
| i = find_unit_index(uptr); | |
| if (i == -1) { | |
| return (SCPE_IERR); | |
| } | |
| DBG_PRINT(("Attach WD179X%d\n", i)); | |
| wd179x_info->drive[i].uptr = uptr; | |
| /* Default to drive not ready */ | |
| wd179x_info->drive[i].ready = 0; | |
| if(uptr->capac > 0) { | |
| char *rtn = fgets(header, 4, uptr->fileref); | |
| if ((rtn != NULL) && strncmp(header, "IMD", 3)) { | |
| sim_printf("WD179X: Only IMD disk images are supported\n"); | |
| wd179x_info->drive[i].uptr = NULL; | |
| return SCPE_OPENERR; | |
| } | |
| } else { | |
| /* create a disk image file in IMD format. */ | |
| if (diskCreate(uptr->fileref, "$Id: wd179x.c 1999 2008-07-22 04:25:28Z hharte $") != SCPE_OK) { | |
| sim_printf("WD179X: Failed to create IMD disk.\n"); | |
| wd179x_info->drive[i].uptr = NULL; | |
| return SCPE_OPENERR; | |
| } | |
| uptr->capac = sim_fsize(uptr->fileref); | |
| } | |
| uptr->u3 = IMAGE_TYPE_IMD; | |
| if (uptr->flags & UNIT_WD179X_VERBOSE) | |
| sim_printf("WD179X%d: attached to '%s', type=%s, len=%d\n", i, cptr, | |
| uptr->u3 == IMAGE_TYPE_IMD ? "IMD" : uptr->u3 == IMAGE_TYPE_CPT ? "CPT" : "DSK", | |
| uptr->capac); | |
| if(uptr->u3 == IMAGE_TYPE_IMD) { | |
| if (uptr->flags & UNIT_WD179X_VERBOSE) | |
| sim_printf("--------------------------------------------------------\n"); | |
| wd179x_info->drive[i].imd = diskOpenEx(uptr->fileref, uptr->flags & UNIT_WD179X_VERBOSE, | |
| &wd179x_dev, VERBOSE_MSG, VERBOSE_MSG); | |
| if (uptr->flags & UNIT_WD179X_VERBOSE) | |
| sim_printf("\n"); | |
| if (wd179x_info->drive[i].imd == NULL) { | |
| sim_printf("WD179X: IMD disk corrupt.\n"); | |
| wd179x_info->drive[i].uptr = NULL; | |
| return SCPE_OPENERR; | |
| } | |
| /* Write-protect the unit if IMD think's it's writelocked. */ | |
| if(imdIsWriteLocked(wd179x_info->drive[i].imd)) { | |
| uptr->flags |= UNIT_WD179X_WLK; | |
| } | |
| wd179x_info->drive[i].ready = 1; | |
| } else { | |
| wd179x_info->drive[i].imd = NULL; | |
| } | |
| wd179x_info->fdc_sec_len = 0; /* 128 byte sectors, fixme */ | |
| wd179x_info->sel_drive = 0; | |
| return SCPE_OK; | |
| } | |
| /* Detach routine */ | |
| t_stat wd179x_detach(UNIT *uptr) | |
| { | |
| t_stat r; | |
| int8 i; | |
| i = find_unit_index(uptr); | |
| if (i == -1) { | |
| return SCPE_IERR; | |
| } | |
| DBG_PRINT(("Detach WD179X%d\n", i)); | |
| r = diskClose(&wd179x_info->drive[i].imd); | |
| wd179x_info->drive[i].ready = 0; | |
| if (r != SCPE_OK) | |
| return r; | |
| r = detach_unit(uptr); /* detach unit */ | |
| if (r != SCPE_OK) | |
| return r; | |
| return SCPE_OK; | |
| } | |
| static int32 wd179xdev(const int32 port, const int32 io, const int32 data) | |
| { | |
| DBG_PRINT(("WD179X: " ADDRESS_FORMAT " %s, Port 0x%02x Data 0x%02x" NLP, | |
| PCX, io ? "OUT" : " IN", port, data)); | |
| if(io) { | |
| WD179X_Write(port, data); | |
| return 0; | |
| } else { | |
| return(WD179X_Read(port)); | |
| } | |
| } | |
| uint8 floorlog2(unsigned int n) | |
| { | |
| /* Compute log2(n) */ | |
| uint8 r = 0; | |
| if (n >= 1<<16) { | |
| n >>=16; | |
| r += 16; | |
| } | |
| if (n >= 1<< 8) { | |
| n >>= 8; | |
| r += 8; | |
| } | |
| if (n >= 1<< 4) { | |
| n >>= 4; | |
| r += 4; | |
| } | |
| if (n >= 1<< 2) { | |
| n >>= 2; | |
| r += 2; | |
| } | |
| if (n >= 1<< 1) { | |
| r += 1; | |
| } | |
| return ((n == 0) ? (0xFF) : r); /* 0xFF is error return value */ | |
| } | |
| uint8 WD179X_Read(const uint32 Addr) | |
| { | |
| uint8 cData; | |
| WD179X_DRIVE_INFO *pDrive; | |
| uint32 flags = 0; | |
| uint32 readlen; | |
| int status; | |
| if(wd179x_info->sel_drive >= WD179X_MAX_DRIVES) { | |
| return 0xFF; | |
| } | |
| pDrive = &wd179x_info->drive[wd179x_info->sel_drive]; | |
| if(pDrive->uptr == NULL) { | |
| return 0xFF; | |
| } | |
| cData = 0x00; | |
| switch(Addr & 0x3) { | |
| case WD179X_STATUS: | |
| /* Fix up status based on Command Type */ | |
| if((wd179x_info->cmdtype == 1) || (wd179x_info->cmdtype == 4)) { | |
| wd179x_info->fdc_status ^= WD179X_STAT_INDEX; /* Generate Index pulses */ | |
| wd179x_info->fdc_status &= ~WD179X_STAT_TRACK0; | |
| wd179x_info->fdc_status |= (pDrive->track == 0) ? WD179X_STAT_TRACK0 : 0; | |
| } else if(wd179x_info->cmdtype == 4) { | |
| } | |
| else { | |
| wd179x_info->fdc_status &= ~WD179X_STAT_INDEX; /* Mask index pulses */ | |
| wd179x_info->fdc_status |= (wd179x_info->drq) ? WD179X_STAT_DRQ : 0; | |
| } | |
| cData = (pDrive->ready == 0) ? WD179X_STAT_NOT_READY : 0; | |
| cData |= wd179x_info->fdc_status; /* Status Register */ | |
| sim_debug(STATUS_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " RD STATUS = 0x%02x\n", PCX, cData); | |
| wd179x_info->intrq = 0; | |
| break; | |
| case WD179X_TRACK: | |
| cData = pDrive->track; | |
| sim_debug(STATUS_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " RD TRACK = 0x%02x\n", PCX, cData); | |
| break; | |
| case WD179X_SECTOR: | |
| cData = wd179x_info->fdc_sector; | |
| sim_debug(STATUS_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " RD SECT = 0x%02x\n", PCX, cData); | |
| break; | |
| case WD179X_DATA: | |
| cData = 0xFF; /* Return High-Z data */ | |
| if(wd179x_info->fdc_read == TRUE) { | |
| if(wd179x_info->fdc_dataindex < wd179x_info->fdc_datacount) { | |
| cData = sdata.raw[wd179x_info->fdc_dataindex]; | |
| if(wd179x_info->fdc_read_addr == TRUE) { | |
| sim_debug(STATUS_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " READ_ADDR[%d] = 0x%02x\n", | |
| wd179x_info->sel_drive, PCX, | |
| wd179x_info->fdc_dataindex, cData); | |
| } | |
| wd179x_info->fdc_dataindex++; | |
| if(wd179x_info->fdc_dataindex == wd179x_info->fdc_datacount) { | |
| if(wd179x_info->fdc_multiple == FALSE) { | |
| wd179x_info->fdc_status &= ~(WD179X_STAT_DRQ | WD179X_STAT_BUSY); /* Clear DRQ, BUSY */ | |
| wd179x_info->drq = 0; | |
| wd179x_info->intrq = 1; | |
| wd179x_info->fdc_read = FALSE; | |
| wd179x_info->fdc_read_addr = FALSE; | |
| } else { | |
| /* Compute Sector Size */ | |
| wd179x_info->fdc_sec_len = floorlog2( | |
| pDrive->imd->track[pDrive->track][wd179x_info->fdc_head].sectsize) - 7; | |
| if((wd179x_info->fdc_sec_len == 0xF8) || (wd179x_info->fdc_sec_len > WD179X_MAX_SEC_LEN)) { /* Error calculating N or N too large */ | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT " Invalid sector size!\n", wd179x_info->sel_drive, PCX); | |
| wd179x_info->fdc_sec_len = 0; | |
| return cData; | |
| } | |
| wd179x_info->fdc_sector ++; | |
| sim_debug(RD_DATA_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT " MULTI_READ_REC, T:%d/S:%d/N:%d, %s, len=%d\n", wd179x_info->sel_drive, PCX, pDrive->track, wd179x_info->fdc_head, wd179x_info->fdc_sector, wd179x_info->ddens ? "DD" : "SD", 128 << wd179x_info->fdc_sec_len); | |
| status = sectRead(pDrive->imd, | |
| pDrive->track, | |
| wd179x_info->fdc_head, | |
| wd179x_info->fdc_sector, | |
| sdata.raw, | |
| 128 << wd179x_info->fdc_sec_len, | |
| &flags, | |
| &readlen); | |
| if(status == SCPE_OK) { | |
| wd179x_info->fdc_status = (WD179X_STAT_DRQ | WD179X_STAT_BUSY); /* Set DRQ, BUSY */ | |
| wd179x_info->drq = 1; | |
| wd179x_info->intrq = 0; | |
| wd179x_info->fdc_datacount = 128 << wd179x_info->fdc_sec_len; | |
| wd179x_info->fdc_dataindex = 0; | |
| wd179x_info->fdc_read = TRUE; | |
| wd179x_info->fdc_read_addr = FALSE; | |
| } else { | |
| wd179x_info->fdc_status = 0; /* Clear DRQ, BUSY */ | |
| wd179x_info->fdc_status |= WD179X_STAT_NOT_FOUND; | |
| wd179x_info->drq = 0; | |
| wd179x_info->intrq = 1; | |
| wd179x_info->fdc_read = FALSE; | |
| wd179x_info->fdc_read_addr = FALSE; | |
| } | |
| } | |
| } | |
| } | |
| } | |
| break; | |
| } | |
| return (cData); | |
| } | |
| /* | |
| * Command processing happens in three stages: | |
| * 1. Flags and initial conditions are set up based on the Type of the command. | |
| * 2. The execution phase takes place. | |
| * 3. Status is updated based on the Type and outcome of the command execution. | |
| * | |
| * See the WD179x-02 Datasheet available on www.hartetechnologies.com/manuals/ | |
| * | |
| */ | |
| static uint8 Do1793Command(uint8 cCommand) | |
| { | |
| uint8 result = 0; | |
| WD179X_DRIVE_INFO *pDrive; | |
| uint32 flags = 0; | |
| uint32 readlen; | |
| int status; | |
| if(wd179x_info->sel_drive >= WD179X_MAX_DRIVES) { | |
| return 0xFF; | |
| } | |
| pDrive = &wd179x_info->drive[wd179x_info->sel_drive]; | |
| if(pDrive->uptr == NULL) { | |
| return 0xFF; | |
| } | |
| if(wd179x_info->fdc_status & WD179X_STAT_BUSY) { | |
| if(((cCommand & 0xF0) != WD179X_FORCE_INTR)) { /* && ((cCommand & 0xF0) != WD179X_RESTORE)) { */ | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " ERROR: Command 0x%02x ignored because controller is BUSY\n\n", | |
| wd179x_info->sel_drive, PCX, cCommand); | |
| } | |
| return 0xFF; | |
| } | |
| wd179x_info->fdc_status &= ~WD179X_STAT_NOT_READY; | |
| /* Extract Type-specific command flags, and set initial conditions */ | |
| switch(cCommand & 0xF0) { | |
| /* Type I Commands */ | |
| case WD179X_RESTORE: | |
| case WD179X_SEEK: | |
| case WD179X_STEP: | |
| case WD179X_STEP_U: | |
| case WD179X_STEP_IN: | |
| case WD179X_STEP_IN_U: | |
| case WD179X_STEP_OUT: | |
| case WD179X_STEP_OUT_U: | |
| wd179x_info->cmdtype = 1; | |
| wd179x_info->fdc_status |= WD179X_STAT_BUSY; /* Set BUSY */ | |
| wd179x_info->fdc_status &= ~(WD179X_STAT_CRC_ERROR | WD179X_STAT_SEEK_ERROR | WD179X_STAT_DRQ); | |
| wd179x_info->intrq = 0; | |
| wd179x_info->hld = cCommand & 0x08; | |
| wd179x_info->verify = cCommand & 0x04; | |
| break; | |
| /* Type II Commands */ | |
| case WD179X_READ_REC: | |
| case WD179X_READ_RECS: | |
| case WD179X_WRITE_REC: | |
| case WD179X_WRITE_RECS: | |
| wd179x_info->cmdtype = 2; | |
| wd179x_info->fdc_status = WD179X_STAT_BUSY; /* Set BUSY, clear all others */ | |
| wd179x_info->intrq = 0; | |
| wd179x_info->hld = 1; /* Load the head immediately, E Flag not checked. */ | |
| break; | |
| /* Type III Commands */ | |
| case WD179X_READ_ADDR: | |
| case WD179X_READ_TRACK: | |
| case WD179X_WRITE_TRACK: | |
| wd179x_info->cmdtype = 3; | |
| break; | |
| /* Type IV Commands */ | |
| case WD179X_FORCE_INTR: | |
| wd179x_info->cmdtype = 4; | |
| break; | |
| default: | |
| wd179x_info->cmdtype = 0; | |
| break; | |
| } | |
| switch(cCommand & 0xF0) { | |
| /* Type I Commands */ | |
| case WD179X_RESTORE: | |
| sim_debug(CMD_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=RESTORE %s\n", wd179x_info->sel_drive, PCX, | |
| wd179x_info->verify ? "[VERIFY]" : ""); | |
| pDrive->track = 0; | |
| wd179x_info->intrq = 1; | |
| break; | |
| case WD179X_SEEK: | |
| sim_debug(SEEK_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=SEEK, track=%d, new=%d\n", wd179x_info->sel_drive, | |
| PCX, pDrive->track, wd179x_info->fdc_data); | |
| pDrive->track = wd179x_info->fdc_data; | |
| break; | |
| case WD179X_STEP: | |
| sim_debug(SEEK_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=STEP\n", wd179x_info->sel_drive, PCX); | |
| break; | |
| case WD179X_STEP_U: | |
| sim_debug(SEEK_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=STEP_U dir=%d\n", wd179x_info->sel_drive, | |
| PCX, wd179x_info->step_dir); | |
| if(wd179x_info->step_dir == 1) { | |
| if (pDrive->track < 255) | |
| pDrive->track++; | |
| } else if (wd179x_info->step_dir == -1) { | |
| if (pDrive->track > 0) | |
| pDrive->track--; | |
| } else { | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " ERROR: undefined direction for STEP\n", | |
| wd179x_info->sel_drive, PCX); | |
| } | |
| break; | |
| case WD179X_STEP_IN: | |
| sim_debug(SEEK_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=STEP_IN\n", wd179x_info->sel_drive, PCX); | |
| break; | |
| case WD179X_STEP_IN_U: | |
| if (pDrive->track < 255) | |
| pDrive->track++; | |
| wd179x_info->step_dir = 1; | |
| sim_debug(SEEK_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=STEP_IN_U, Track=%d\n", wd179x_info->sel_drive, | |
| PCX, pDrive->track); | |
| break; | |
| case WD179X_STEP_OUT: | |
| sim_debug(SEEK_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=STEP_OUT\n", wd179x_info->sel_drive, PCX); | |
| break; | |
| case WD179X_STEP_OUT_U: | |
| sim_debug(SEEK_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=STEP_OUT_U\n", wd179x_info->sel_drive, PCX); | |
| if (pDrive->track > 0) | |
| pDrive->track--; | |
| wd179x_info->step_dir = -1; | |
| break; | |
| /* Type II Commands */ | |
| case WD179X_READ_REC: | |
| case WD179X_READ_RECS: | |
| /* Compute Sector Size */ | |
| wd179x_info->fdc_sec_len = floorlog2( | |
| pDrive->imd->track[pDrive->track][wd179x_info->fdc_head].sectsize) - 7; | |
| if((wd179x_info->fdc_sec_len == 0xF8) || (wd179x_info->fdc_sec_len > WD179X_MAX_SEC_LEN)) { /* Error calculating N or N too large */ | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " Invalid sector size!\n", wd179x_info->sel_drive, PCX); | |
| wd179x_info->fdc_status |= WD179X_STAT_NOT_FOUND; /* Sector not found */ | |
| wd179x_info->fdc_status &= ~WD179X_STAT_BUSY; | |
| wd179x_info->intrq = 1; | |
| wd179x_info->drq = 0; | |
| wd179x_info->fdc_sec_len = 0; | |
| return 0xFF; | |
| } | |
| wd179x_info->fdc_multiple = (cCommand & 0x10) ? TRUE : FALSE; | |
| sim_debug(RD_DATA_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=READ_REC, T:%d/S:%d/N:%d, %s, %s len=%d\n", | |
| wd179x_info->sel_drive, PCX, pDrive->track, | |
| wd179x_info->fdc_head, wd179x_info->fdc_sector, | |
| wd179x_info->fdc_multiple ? "Multiple" : "Single", | |
| wd179x_info->ddens ? "DD" : "SD", 128 << wd179x_info->fdc_sec_len); | |
| if(IMD_MODE_MFM(pDrive->imd->track[pDrive->track][wd179x_info->fdc_head].mode) != (wd179x_info->ddens)) { | |
| wd179x_info->fdc_status |= WD179X_STAT_NOT_FOUND; /* Sector not found */ | |
| wd179x_info->fdc_status &= ~WD179X_STAT_BUSY; | |
| wd179x_info->intrq = 1; | |
| wd179x_info->drq = 0; | |
| } else { | |
| status = sectRead(pDrive->imd, | |
| pDrive->track, | |
| wd179x_info->fdc_head, | |
| wd179x_info->fdc_sector, | |
| sdata.raw, | |
| 128 << wd179x_info->fdc_sec_len, | |
| &flags, | |
| &readlen); | |
| if(status == SCPE_OK) { | |
| wd179x_info->fdc_status |= (WD179X_STAT_DRQ); /* Set DRQ */ | |
| wd179x_info->drq = 1; | |
| wd179x_info->fdc_datacount = 128 << wd179x_info->fdc_sec_len; | |
| wd179x_info->fdc_dataindex = 0; | |
| wd179x_info->fdc_write = FALSE; | |
| wd179x_info->fdc_write_track = FALSE; | |
| wd179x_info->fdc_read = TRUE; | |
| wd179x_info->fdc_read_addr = FALSE; | |
| } else { | |
| wd179x_info->fdc_status = 0; /* Clear DRQ, BUSY */ | |
| wd179x_info->fdc_status |= WD179X_STAT_NOT_FOUND; | |
| wd179x_info->fdc_status &= ~WD179X_STAT_BUSY; | |
| wd179x_info->drq = 0; | |
| wd179x_info->intrq = 1; | |
| wd179x_info->fdc_read = FALSE; | |
| wd179x_info->fdc_read_addr = FALSE; | |
| } | |
| } | |
| break; | |
| case WD179X_WRITE_RECS: | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " Error: WRITE_RECS not implemented.\n", wd179x_info->sel_drive, PCX); | |
| break; | |
| case WD179X_WRITE_REC: | |
| /* Compute Sector Size */ | |
| wd179x_info->fdc_sec_len = floorlog2( | |
| pDrive->imd->track[pDrive->track][wd179x_info->fdc_head].sectsize) - 7; | |
| if((wd179x_info->fdc_sec_len == 0xF8) || (wd179x_info->fdc_sec_len > WD179X_MAX_SEC_LEN)) { /* Error calculating N or N too large */ | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " Invalid sector size!\n", wd179x_info->sel_drive, PCX); | |
| wd179x_info->fdc_sec_len = 0; | |
| } | |
| sim_debug(WR_DATA_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=WRITE_REC, T:%d/S:%d/N:%d, %s.\n", wd179x_info->sel_drive, PCX, pDrive->track, wd179x_info->fdc_head, wd179x_info->fdc_sector, (cCommand & 0x10) ? "Multiple" : "Single"); | |
| wd179x_info->fdc_status |= (WD179X_STAT_DRQ); /* Set DRQ */ | |
| wd179x_info->drq = 1; | |
| wd179x_info->fdc_datacount = 128 << wd179x_info->fdc_sec_len; | |
| wd179x_info->fdc_dataindex = 0; | |
| wd179x_info->fdc_write = TRUE; | |
| wd179x_info->fdc_write_track = FALSE; | |
| wd179x_info->fdc_read = FALSE; | |
| wd179x_info->fdc_read_addr = FALSE; | |
| sdata.raw[wd179x_info->fdc_dataindex] = wd179x_info->fdc_data; | |
| break; | |
| /* Type III Commands */ | |
| case WD179X_READ_ADDR: | |
| sim_debug(RD_DATA_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=READ_ADDR, T:%d/S:%d, %s\n", wd179x_info->sel_drive, | |
| PCX, pDrive->track, wd179x_info->fdc_head, wd179x_info->ddens ? "DD" : "SD"); | |
| /* For some reason 86-DOS tries to use this track, force it to 0. Need to investigate this more. */ | |
| if (pDrive->track == 0xFF) | |
| pDrive->track=0; | |
| /* Compute Sector Size */ | |
| wd179x_info->fdc_sec_len = floorlog2( | |
| pDrive->imd->track[pDrive->track][wd179x_info->fdc_head].sectsize) - 7; | |
| if((wd179x_info->fdc_sec_len == 0xF8) || (wd179x_info->fdc_sec_len > WD179X_MAX_SEC_LEN)) { /* Error calculating N or N too large */ | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " Invalid sector size!\n", wd179x_info->sel_drive, PCX); | |
| wd179x_info->fdc_sec_len = 0; | |
| } | |
| if(IMD_MODE_MFM(pDrive->imd->track[pDrive->track][wd179x_info->fdc_head].mode) != (wd179x_info->ddens)) { | |
| wd179x_info->fdc_status = WD179X_STAT_NOT_FOUND; /* Sector not found */ | |
| wd179x_info->intrq = 1; | |
| } else { | |
| wd179x_info->fdc_status = (WD179X_STAT_DRQ | WD179X_STAT_BUSY); /* Set DRQ, BUSY */ | |
| wd179x_info->drq = 1; | |
| wd179x_info->fdc_datacount = 6; | |
| wd179x_info->fdc_dataindex = 0; | |
| wd179x_info->fdc_read = TRUE; | |
| wd179x_info->fdc_read_addr = TRUE; | |
| sdata.raw[0] = pDrive->track; | |
| sdata.raw[1] = wd179x_info->fdc_head; | |
| sdata.raw[2] = wd179x_info->fdc_sector; | |
| sdata.raw[3] = wd179x_info->fdc_sec_len; | |
| sdata.raw[4] = 0xAA; /* CRC1 */ | |
| sdata.raw[5] = 0x55; /* CRC2 */ | |
| wd179x_info->fdc_sector = pDrive->track; | |
| wd179x_info->fdc_status &= ~(WD179X_STAT_BUSY); /* Clear BUSY */ | |
| wd179x_info->intrq = 1; | |
| } | |
| break; | |
| case WD179X_READ_TRACK: | |
| sim_debug(RD_DATA_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=READ_TRACK\n", wd179x_info->sel_drive, PCX); | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " Error: READ_TRACK not implemented.\n", wd179x_info->sel_drive, PCX); | |
| break; | |
| case WD179X_WRITE_TRACK: | |
| sim_debug(WR_DATA_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=WRITE_TRACK\n", wd179x_info->sel_drive, PCX); | |
| sim_debug(FMT_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=WRITE_TRACK, T:%d/S:%d.\n", wd179x_info->sel_drive, | |
| PCX, pDrive->track, wd179x_info->fdc_head); | |
| wd179x_info->fdc_status |= (WD179X_STAT_DRQ); /* Set DRQ */ | |
| wd179x_info->drq = 1; | |
| wd179x_info->fdc_datacount = 128 << wd179x_info->fdc_sec_len; | |
| wd179x_info->fdc_dataindex = 0; | |
| wd179x_info->fdc_write = FALSE; | |
| wd179x_info->fdc_write_track = TRUE; | |
| wd179x_info->fdc_read = FALSE; | |
| wd179x_info->fdc_read_addr = FALSE; | |
| wd179x_info->fdc_fmt_state = FMT_GAP1; /* TRUE when writing an entire track */ | |
| wd179x_info->fdc_fmt_sector_count = 0; | |
| break; | |
| /* Type IV Commands */ | |
| case WD179X_FORCE_INTR: | |
| sim_debug(CMD_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " CMD=FORCE_INTR\n", wd179x_info->sel_drive, PCX); | |
| if((cCommand & 0x0F) == 0) { /* I0-I3 == 0, no intr, but clear BUSY and terminate command */ | |
| wd179x_info->fdc_status &= ~(WD179X_STAT_DRQ | WD179X_STAT_BUSY); /* Clear DRQ, BUSY */ | |
| wd179x_info->drq = 0; | |
| wd179x_info->fdc_write = FALSE; | |
| wd179x_info->fdc_read = FALSE; | |
| wd179x_info->fdc_write_track = FALSE; | |
| wd179x_info->fdc_read_addr = FALSE; | |
| wd179x_info->fdc_datacount = 0; | |
| wd179x_info->fdc_dataindex = 0; | |
| } else { | |
| if(wd179x_info->fdc_status & WD179X_STAT_BUSY) { /* Force Interrupt when command is pending */ | |
| } else { /* Command not pending, clear status */ | |
| wd179x_info->fdc_status = 0; | |
| } | |
| if(cCommand & 0x04) { | |
| wd179x_info->index_pulse_wait = TRUE; | |
| if(wd179x_info->sel_drive < WD179X_MAX_DRIVES) { | |
| sim_activate (wd179x_unit, ((wd179x_info->drive[wd179x_info->sel_drive].imd->ntracks % 77) == 0) ? CROMFDC_8IN_ROT : CROMFDC_5IN_ROT); /* Generate INDEX pulse */ | |
| /* sim_printf("Drive %d Num tracks=%d\n", wd179x_info->sel_drive, wd179x_info->drive[wd179x_info->sel_drive].imd->ntracks); */ | |
| } | |
| } else { | |
| wd179x_info->intrq = 1; | |
| } | |
| wd179x_info->fdc_status &= ~(WD179X_STAT_BUSY); /* Clear BUSY */ | |
| } | |
| break; | |
| default: | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " ERROR: Unknown command 0x%02x.\n\n", wd179x_info->sel_drive, PCX, cCommand); | |
| break; | |
| } | |
| /* Post processing of Type-specific command */ | |
| switch(cCommand & 0xF0) { | |
| /* Type I Commands */ | |
| case WD179X_RESTORE: | |
| case WD179X_SEEK: | |
| case WD179X_STEP: | |
| case WD179X_STEP_U: | |
| case WD179X_STEP_IN: | |
| case WD179X_STEP_IN_U: | |
| case WD179X_STEP_OUT: | |
| case WD179X_STEP_OUT_U: | |
| if(wd179x_info->verify) { /* Verify the selected track/head is ok. */ | |
| sim_debug(SEEK_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " Verify ", wd179x_info->sel_drive, PCX); | |
| if(sectSeek(pDrive->imd, pDrive->track, wd179x_info->fdc_head) != SCPE_OK) { | |
| sim_debug(SEEK_MSG, &wd179x_dev, "FAILED\n"); | |
| wd179x_info->fdc_status |= WD179X_STAT_NOT_FOUND; | |
| } else if(IMD_MODE_MFM(pDrive->imd->track[pDrive->track][wd179x_info->fdc_head].mode) != (wd179x_info->ddens)) { | |
| wd179x_info->fdc_status |= WD179X_STAT_NOT_FOUND; /* Sector not found */ | |
| sim_debug(SEEK_MSG, &wd179x_dev, "NOT FOUND\n"); | |
| } else { | |
| sim_debug(SEEK_MSG, &wd179x_dev, "Ok\n"); | |
| } | |
| } | |
| if(pDrive->track == 0) { | |
| wd179x_info->fdc_status |= WD179X_STAT_TRACK0; | |
| } else { | |
| wd179x_info->fdc_status &= ~(WD179X_STAT_TRACK0); | |
| } | |
| wd179x_info->fdc_status &= ~(WD179X_STAT_BUSY); /* Clear BUSY */ | |
| wd179x_info->intrq = 1; | |
| break; | |
| /* Type II Commands */ | |
| case WD179X_READ_REC: | |
| case WD179X_READ_RECS: | |
| case WD179X_WRITE_REC: | |
| case WD179X_WRITE_RECS: | |
| /* Type III Commands */ | |
| case WD179X_READ_ADDR: | |
| case WD179X_READ_TRACK: | |
| case WD179X_WRITE_TRACK: | |
| /* Type IV Commands */ | |
| case WD179X_FORCE_INTR: | |
| default: | |
| break; | |
| } | |
| return result; | |
| } | |
| /* Maximum number of sectors per track for format */ | |
| uint8 max_sectors_per_track[2][7] = { | |
| /* 128, 256, 512, 1024, 2048, 4096, 8192 */ | |
| { 26, 15, 8, 4, 2, 1, 0 }, /* Single-density table */ | |
| { 26, 26, 15, 8, 4, 2, 1 } /* Double-density table */ | |
| }; | |
| uint8 WD179X_Write(const uint32 Addr, uint8 cData) | |
| { | |
| WD179X_DRIVE_INFO *pDrive; | |
| /* uint8 disk_read = 0; */ | |
| uint32 flags = 0; | |
| uint32 writelen; | |
| if(wd179x_info->sel_drive >= WD179X_MAX_DRIVES) { | |
| return 0xFF; | |
| } | |
| pDrive = &wd179x_info->drive[wd179x_info->sel_drive]; | |
| if(pDrive->uptr == NULL) { | |
| return 0xFF; | |
| } | |
| switch(Addr & 0x3) { | |
| case WD179X_STATUS: | |
| sim_debug(STATUS_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " WR CMD = 0x%02x\n", PCX, cData); | |
| wd179x_info->fdc_read = FALSE; | |
| wd179x_info->fdc_write = FALSE; | |
| wd179x_info->fdc_write_track = FALSE; | |
| wd179x_info->fdc_datacount = 0; | |
| wd179x_info->fdc_dataindex = 0; | |
| Do1793Command(cData); | |
| break; | |
| case WD179X_TRACK: | |
| sim_debug(STATUS_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " WR TRACK = 0x%02x\n", PCX, cData); | |
| pDrive->track = cData; | |
| break; | |
| case WD179X_SECTOR: /* Sector Register */ | |
| sim_debug(STATUS_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " WR SECT = 0x%02x\n", PCX, cData); | |
| wd179x_info->fdc_sector = cData; | |
| break; | |
| case WD179X_DATA: | |
| sim_debug(STATUS_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " WR DATA = 0x%02x\n", PCX, cData); | |
| if(wd179x_info->fdc_write == TRUE) { | |
| if(wd179x_info->fdc_dataindex < wd179x_info->fdc_datacount) { | |
| sdata.raw[wd179x_info->fdc_dataindex] = cData; | |
| wd179x_info->fdc_dataindex++; | |
| if(wd179x_info->fdc_dataindex == wd179x_info->fdc_datacount) { | |
| wd179x_info->fdc_status &= ~(WD179X_STAT_DRQ | WD179X_STAT_BUSY); /* Clear DRQ, BUSY */ | |
| wd179x_info->drq = 0; | |
| wd179x_info->intrq = 1; | |
| sim_debug(WR_DATA_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " Writing sector, T:%d/S:%d/N:%d, Len=%d\n", wd179x_info->sel_drive, PCX, pDrive->track, wd179x_info->fdc_head, wd179x_info->fdc_sector, 128 << wd179x_info->fdc_sec_len); | |
| sectWrite(pDrive->imd, | |
| pDrive->track, | |
| wd179x_info->fdc_head, | |
| wd179x_info->fdc_sector, | |
| sdata.raw, | |
| 128 << wd179x_info->fdc_sec_len, | |
| &flags, | |
| &writelen); | |
| wd179x_info->fdc_write = FALSE; | |
| } | |
| } | |
| } | |
| if(wd179x_info->fdc_write_track == TRUE) { | |
| if(wd179x_info->fdc_fmt_state == FMT_GAP1) { | |
| if(cData != 0xFC) { | |
| wd179x_info->fdc_gap[0]++; | |
| } else { | |
| sim_debug(VERBOSE_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " FMT GAP1 Length = %d\n", PCX, wd179x_info->fdc_gap[0]); | |
| wd179x_info->fdc_gap[1] = 0; | |
| wd179x_info->fdc_fmt_state = FMT_GAP2; | |
| } | |
| } else if(wd179x_info->fdc_fmt_state == FMT_GAP2) { | |
| if(cData != 0xFE) { | |
| wd179x_info->fdc_gap[1]++; | |
| } else { | |
| sim_debug(VERBOSE_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " FMT GAP2 Length = %d\n", PCX, wd179x_info->fdc_gap[1]); | |
| wd179x_info->fdc_gap[2] = 0; | |
| wd179x_info->fdc_fmt_state = FMT_HEADER; | |
| wd179x_info->fdc_header_index = 0; | |
| } | |
| } else if(wd179x_info->fdc_fmt_state == FMT_HEADER) { | |
| if(wd179x_info->fdc_header_index == 5) { | |
| wd179x_info->fdc_gap[2] = 0; | |
| wd179x_info->fdc_fmt_state = FMT_GAP3; | |
| } else { | |
| sim_debug(VERBOSE_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " HEADER[%d]=%02x\n", PCX, wd179x_info->fdc_header_index, cData); | |
| switch(wd179x_info->fdc_header_index) { | |
| case 0: | |
| pDrive->track = cData; | |
| break; | |
| case 1: | |
| wd179x_info->fdc_head = cData; | |
| break; | |
| case 2: | |
| wd179x_info->fdc_sector = cData; | |
| break; | |
| case 3: | |
| if(cData != 0x00) { | |
| } | |
| break; | |
| case 4: | |
| if(cData != 0xF7) { | |
| } | |
| break; | |
| } | |
| wd179x_info->fdc_header_index++; | |
| } | |
| } else if(wd179x_info->fdc_fmt_state == FMT_GAP3) { | |
| if(cData != 0xFB) { | |
| wd179x_info->fdc_gap[2]++; | |
| } else { | |
| sim_debug(VERBOSE_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " FMT GAP3 Length = %d\n", PCX, wd179x_info->fdc_gap[2]); | |
| wd179x_info->fdc_fmt_state = FMT_DATA; | |
| wd179x_info->fdc_dataindex = 0; | |
| } | |
| } else if(wd179x_info->fdc_fmt_state == FMT_DATA) { /* data bytes */ | |
| if(cData != 0xF7) { | |
| sdata.raw[wd179x_info->fdc_dataindex] = cData; | |
| wd179x_info->fdc_dataindex++; | |
| } else { | |
| wd179x_info->fdc_sec_len = floorlog2(wd179x_info->fdc_dataindex) - 7; | |
| if((wd179x_info->fdc_sec_len == 0xF8) || (wd179x_info->fdc_sec_len > WD179X_MAX_SEC_LEN)) { /* Error calculating N or N too large */ | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X[%d]: " ADDRESS_FORMAT | |
| " Invalid sector size!\n", wd179x_info->sel_drive, PCX); | |
| wd179x_info->fdc_sec_len = 0; | |
| } | |
| if(wd179x_info->fdc_fmt_sector_count >= WD179X_MAX_SECTOR) { | |
| sim_debug(ERROR_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " Illegal sector count\n", PCX); | |
| wd179x_info->fdc_fmt_sector_count = 0; | |
| } | |
| wd179x_info->fdc_sectormap[wd179x_info->fdc_fmt_sector_count] = wd179x_info->fdc_sector; | |
| wd179x_info->fdc_fmt_sector_count++; | |
| sim_debug(VERBOSE_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " FMT Data Length = %d\n", PCX, wd179x_info->fdc_dataindex); | |
| sim_debug(FMT_MSG, &wd179x_dev, "WD179X: " ADDRESS_FORMAT | |
| " FORMAT T:%d/H:%d/N:%d=%d/L=%d[%d] Fill=0x%02x\n", PCX, | |
| pDrive->track, wd179x_info->fdc_head, | |
| wd179x_info->fdc_fmt_sector_count, | |
| wd179x_info->fdc_sectormap[wd179x_info->fdc_fmt_sector_count], | |
| wd179x_info->fdc_dataindex, wd179x_info->fdc_sec_len, sdata.raw[0]); | |
| wd179x_info->fdc_gap[1] = 0; | |
| wd179x_info->fdc_fmt_state = FMT_GAP2; | |
| if(wd179x_info->fdc_fmt_sector_count == max_sectors_per_track[wd179x_info->ddens & 1][wd179x_info->fdc_sec_len]) { | |
| trackWrite(pDrive->imd, | |
| pDrive->track, | |
| wd179x_info->fdc_head, | |
| wd179x_info->fdc_fmt_sector_count, | |
| wd179x_info->fdc_sec_len, | |
| wd179x_info->fdc_sectormap, | |
| wd179x_info->ddens ? 3 : 0, /* data mode */ | |
| sdata.raw[0], | |
| &flags); | |
| wd179x_info->fdc_status &= ~(WD179X_STAT_BUSY | WD179X_STAT_LOST_DATA); /* Clear BUSY, LOST_DATA */ | |
| wd179x_info->drq = 0; | |
| wd179x_info->intrq = 1; | |
| /* Recalculate disk size */ | |
| pDrive->uptr->capac = sim_fsize(pDrive->uptr->fileref); | |
| } | |
| } | |
| } | |
| } | |
| wd179x_info->fdc_data = cData; | |
| break; | |
| } | |
| return 0; | |
| } | |