| /************************************************************************* | |
| * * | |
| * $Id: vfdhd.c 1995 2008-07-15 03:59:13Z 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: * | |
| * Micropolis FDC module for SIMH * | |
| * * | |
| * Environment: * | |
| * User mode only * | |
| * * | |
| *************************************************************************/ | |
| /*#define DBG_MSG */ | |
| #define USE_VGI /* Use 275-byte VGI-format sectors (includes all metadata) */ | |
| #include "altairz80_defs.h" | |
| #if defined (_WIN32) | |
| #include <windows.h> | |
| #endif | |
| #include "sim_imd.h" | |
| /* #define DBG_MSG */ | |
| #ifdef DBG_MSG | |
| #define DBG_PRINT(args) sim_printf args | |
| #else | |
| #define DBG_PRINT(args) | |
| #endif | |
| /* 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 VERBOSE_MSG (1 << 6) | |
| static void VFDHD_Command(void); | |
| #define VFDHD_MAX_DRIVES 4 | |
| #define VFDHD_SECTOR_LEN 275 | |
| #define VFDHD_RAW_LEN (40 + VFDHD_SECTOR_LEN + 128) | |
| typedef union { | |
| struct { | |
| uint8 preamble[40]; /* Hard disk uses 30 bytes of preamble, floppy uses 40. */ | |
| uint8 sync; | |
| uint8 header[2]; | |
| uint8 unused[10]; | |
| uint8 data[256]; | |
| uint8 checksum; | |
| uint8 ecc[4]; | |
| uint8 ecc_valid; /* 0xAA indicates ECC is being used. */ | |
| uint8 postamble[128]; | |
| } u; | |
| uint8 raw[VFDHD_RAW_LEN]; | |
| } SECTOR_FORMAT; | |
| typedef struct { | |
| UNIT *uptr; | |
| DISK_INFO *imd; | |
| uint16 ntracks; /* number of tracks */ | |
| uint8 nheads; /* number of heads */ | |
| uint8 nspt; /* number of sectors per track */ | |
| uint8 npre_len; /* preamble length */ | |
| uint32 sectsize; /* sector size, not including pre/postamble */ | |
| uint16 track; | |
| uint8 wp; /* Disk write protected */ | |
| uint8 ready; /* Drive is ready */ | |
| uint8 write_fault; | |
| uint8 seek_complete; | |
| uint8 sync_lost; | |
| uint32 sector_wait_count; | |
| } VFDHD_DRIVE_INFO; | |
| typedef struct { | |
| PNP_INFO pnp; /* Plug and Play */ | |
| uint8 xfr_flag; /* Indicates controller is ready to send/receive data */ | |
| uint8 sel_drive; /* Currently selected drive */ | |
| uint8 selected; /* 1 if drive is selected */ | |
| uint8 track0; /* Set it selected drive is on track 0 */ | |
| uint8 head; /* Currently selected head */ | |
| uint8 wr_latch; /* Write enable latch */ | |
| uint8 int_enable; /* Interrupt Enable */ | |
| uint32 datacount; /* Number of data bytes transferred from controller for current sector */ | |
| uint8 step; | |
| uint8 direction; | |
| uint8 rwc; | |
| uint8 sector; | |
| uint8 read; | |
| uint8 ecc_enable; | |
| uint8 precomp; | |
| uint8 floppy_sel; | |
| uint8 controller_busy; | |
| uint8 motor_on; | |
| uint8 hdsk_type; | |
| VFDHD_DRIVE_INFO drive[VFDHD_MAX_DRIVES]; | |
| } VFDHD_INFO; | |
| static VFDHD_INFO vfdhd_info_data = { { 0x0, 0, 0xC0, 4 } }; | |
| static VFDHD_INFO *vfdhd_info = &vfdhd_info_data; | |
| 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); | |
| #define UNIT_V_VFDHD_VERBOSE (UNIT_V_UF + 1) /* verbose mode, i.e. show error messages */ | |
| #define UNIT_VFDHD_VERBOSE (1 << UNIT_V_VFDHD_VERBOSE) | |
| #define VFDHD_CAPACITY (77*2*16*256) /* Default Micropolis Disk Capacity */ | |
| static t_stat vfdhd_reset(DEVICE *vfdhd_dev); | |
| static t_stat vfdhd_attach(UNIT *uptr, char *cptr); | |
| static t_stat vfdhd_detach(UNIT *uptr); | |
| static int32 vfdhddev(const int32 port, const int32 io, const int32 data); | |
| static uint8 VFDHD_Read(const uint32 Addr); | |
| static uint8 VFDHD_Write(const uint32 Addr, uint8 cData); | |
| static int32 hdSize = 5; | |
| static UNIT vfdhd_unit[] = { | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, VFDHD_CAPACITY) }, | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, VFDHD_CAPACITY) }, | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, VFDHD_CAPACITY) }, | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, VFDHD_CAPACITY) } | |
| }; | |
| static REG vfdhd_reg[] = { | |
| { DRDATAD (HDSIZE, hdSize, 10, "Size register"), }, | |
| { NULL } | |
| }; | |
| #define VFDHD_NAME "Vector Graphic FD-HD Controller VFDHD" | |
| static MTAB vfdhd_mod[] = { | |
| { MTAB_XTD|MTAB_VDV, 0, "IOBASE", "IOBASE", | |
| &set_iobase, &show_iobase, NULL, "Sets disk controller I/O base address" }, | |
| /* quiet, no warning messages */ | |
| { UNIT_VFDHD_VERBOSE, 0, "QUIET", "QUIET", | |
| NULL, NULL, NULL, "No verbose messages for unit " VFDHD_NAME "n" }, | |
| /* verbose, show warning messages */ | |
| { UNIT_VFDHD_VERBOSE, UNIT_VFDHD_VERBOSE, "VERBOSE", "VERBOSE", | |
| NULL, NULL, NULL, "Verbose messages for unit " VFDHD_NAME "n" }, | |
| { 0 } | |
| }; | |
| /* Debug Flags */ | |
| static DEBTAB vfdhd_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" }, | |
| { "VERBOSE", VERBOSE_MSG, "Verbose messages" }, | |
| { NULL, 0 } | |
| }; | |
| DEVICE vfdhd_dev = { | |
| "VFDHD", vfdhd_unit, vfdhd_reg, vfdhd_mod, | |
| VFDHD_MAX_DRIVES, 10, 31, 1, VFDHD_MAX_DRIVES, VFDHD_MAX_DRIVES, | |
| NULL, NULL, &vfdhd_reset, | |
| NULL, &vfdhd_attach, &vfdhd_detach, | |
| &vfdhd_info_data, (DEV_DISABLE | DEV_DIS | DEV_DEBUG), ERROR_MSG, | |
| vfdhd_dt, NULL, VFDHD_NAME | |
| }; | |
| /* Reset routine */ | |
| static t_stat vfdhd_reset(DEVICE *dptr) | |
| { | |
| PNP_INFO *pnp = (PNP_INFO *)dptr->ctxt; | |
| if(dptr->flags & DEV_DIS) { | |
| sim_map_resource(pnp->io_base, pnp->io_size, RESOURCE_TYPE_IO, &vfdhddev, TRUE); | |
| } else { | |
| /* Connect MFDC at base address */ | |
| if(sim_map_resource(pnp->io_base, pnp->io_size, RESOURCE_TYPE_IO, &vfdhddev, FALSE) != 0) { | |
| sim_printf("%s: error mapping I/O resource at 0x%04x\n", __FUNCTION__, pnp->io_base); | |
| return SCPE_ARG; | |
| } | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Attach routine */ | |
| static t_stat vfdhd_attach(UNIT *uptr, char *cptr) | |
| { | |
| t_stat r; | |
| unsigned int 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); | |
| for(i = 0; i < VFDHD_MAX_DRIVES; i++) { | |
| vfdhd_info->drive[i].uptr = &vfdhd_dev.units[i]; | |
| } | |
| for(i = 0; i < VFDHD_MAX_DRIVES; i++) { | |
| if(vfdhd_dev.units[i].fileref == uptr->fileref) { | |
| break; | |
| } | |
| } | |
| if(uptr->capac > 0) { | |
| r = assignDiskType(uptr); | |
| if (r != SCPE_OK) { | |
| vfdhd_detach(uptr); | |
| return r; | |
| } | |
| } else { | |
| /* creating file, must be DSK format. */ | |
| uptr->u3 = IMAGE_TYPE_DSK; | |
| } | |
| if (uptr->flags & UNIT_VFDHD_VERBOSE) | |
| sim_printf("VFDHD%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->capac < 318000) { | |
| sim_printf("Cannot create IMD files with SIMH.\nCopy an existing file and format it with CP/M.\n"); | |
| vfdhd_detach(uptr); | |
| return SCPE_OPENERR; | |
| } | |
| if (uptr->flags & UNIT_VFDHD_VERBOSE) | |
| sim_printf("--------------------------------------------------------\n"); | |
| vfdhd_info->drive[i].imd = diskOpenEx((uptr->fileref), (uptr->flags & UNIT_VFDHD_VERBOSE), | |
| &vfdhd_dev, VERBOSE_MSG, VERBOSE_MSG); | |
| if (uptr->flags & UNIT_VFDHD_VERBOSE) | |
| sim_printf("\n"); | |
| } else { | |
| vfdhd_info->drive[i].imd = NULL; | |
| } | |
| if(i>0) { /* Floppy Disk, Unit 1-3 */ | |
| vfdhd_info->drive[i].ntracks = 77; /* number of tracks */ | |
| vfdhd_info->drive[i].nheads = 2; /* number of heads */ | |
| vfdhd_info->drive[i].nspt = 16; /* number of sectors per track */ | |
| vfdhd_info->drive[i].npre_len = 40; /* preamble length */ | |
| vfdhd_info->drive[i].sectsize = VFDHD_SECTOR_LEN; /* sector size, not including pre/postamble */ | |
| } else { /* Hard Disk, Unit 0 */ | |
| if(hdSize == 10) { | |
| vfdhd_info->drive[i].ntracks = 153; /* number of tracks */ | |
| vfdhd_info->drive[i].nheads = 6; /* number of heads */ | |
| vfdhd_info->hdsk_type = 1; | |
| sim_printf("10MB\n"); | |
| } else if (hdSize == 5) { | |
| vfdhd_info->drive[i].ntracks = 153; /* number of tracks */ | |
| vfdhd_info->drive[i].nheads = 4; /* number of heads */ | |
| vfdhd_info->hdsk_type = 0; | |
| sim_printf("5MB\n"); | |
| } else { | |
| vfdhd_info->drive[i].ntracks = 512; /* number of tracks */ | |
| vfdhd_info->drive[i].nheads = 8; /* number of heads */ | |
| vfdhd_info->hdsk_type = 1; | |
| sim_printf("32MB\n"); | |
| } | |
| vfdhd_info->drive[i].nheads = 4; /* number of heads */ | |
| vfdhd_info->drive[i].nspt = 32; /* number of sectors per track */ | |
| vfdhd_info->drive[i].npre_len = 30; /* preamble length */ | |
| vfdhd_info->drive[i].sectsize = VFDHD_SECTOR_LEN; /* sector size, not including pre/postamble */ | |
| vfdhd_info->drive[i].ready = 1; | |
| vfdhd_info->drive[i].seek_complete = 1; | |
| vfdhd_info->drive[i].sync_lost = 1; /* Active LOW */ | |
| } | |
| vfdhd_info->motor_on = 1; | |
| return SCPE_OK; | |
| } | |
| /* Detach routine */ | |
| static t_stat vfdhd_detach(UNIT *uptr) | |
| { | |
| t_stat r; | |
| int8 i; | |
| for(i = 0; i < VFDHD_MAX_DRIVES; i++) { | |
| if(vfdhd_dev.units[i].fileref == uptr->fileref) { | |
| break; | |
| } | |
| } | |
| DBG_PRINT(("Detach VFDHD%d\n", i)); | |
| r = diskClose(&vfdhd_info->drive[i].imd); | |
| if (r != SCPE_OK) | |
| return r; | |
| r = detach_unit(uptr); /* detach unit */ | |
| if (r != SCPE_OK) | |
| return r; | |
| return SCPE_OK; | |
| } | |
| static uint8 cy; | |
| static uint8 adc(uint8 sum, uint8 a1) | |
| { | |
| uint32 total; | |
| total = sum + a1 + cy; | |
| if(total > 0xFF) { | |
| cy = 1; | |
| } else { | |
| cy = 0; | |
| } | |
| return(total & 0xFF); | |
| } | |
| static int32 vfdhddev(const int32 port, const int32 io, const int32 data) | |
| { | |
| DBG_PRINT(("VFDHD: " ADDRESS_FORMAT " IO %s, Port %02x" NLP, PCX, io ? "WR" : "RD", port)); | |
| if(io) { | |
| VFDHD_Write(port, data); | |
| return 0; | |
| } else { | |
| return(VFDHD_Read(port)); | |
| } | |
| } | |
| #define FDHD_CTRL_STATUS0 0 /* R=Status Port 0, W=Control Port 0 */ | |
| #define FDHD_CTRL_STATUS1 1 /* R=Status Port 1, W=Control Port 0 */ | |
| #define FDHD_DATA 2 /* R/W=Data Port */ | |
| #define FDHD_RESET_START 3 /* R=RESET, W=START */ | |
| static uint8 VFDHD_Read(const uint32 Addr) | |
| { | |
| uint8 cData; | |
| VFDHD_DRIVE_INFO *pDrive; | |
| pDrive = &vfdhd_info->drive[vfdhd_info->sel_drive]; | |
| cData = 0x00; | |
| switch(Addr & 0x3) { | |
| case FDHD_CTRL_STATUS0: | |
| cData = (pDrive->wp & 1); /* [0] Write Protect (FD) */ | |
| cData |= (pDrive->ready & 1) << 1; /* [1] Drive ready (HD) */ | |
| cData |= (pDrive->track == 0) ? 0x04 : 0; /* [2] TK0 (FD/HD) */ | |
| cData |= (pDrive->write_fault & 1) << 3; /* [3] Write Fault (HD) */ | |
| cData |= (pDrive->seek_complete & 1) << 4; /* [4] Seek Complete (HD) */ | |
| cData |= (pDrive->sync_lost & 1) << 5; /* [5] Loss of Sync (HD) */ | |
| cData |= 0xC0; /* [7:6] Reserved (pulled up) */ | |
| sim_debug(STATUS_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " RD S0 = 0x%02x\n", PCX, cData); | |
| break; | |
| case FDHD_CTRL_STATUS1: | |
| vfdhd_info->floppy_sel = (vfdhd_info->sel_drive == 0) ? 0 : 1; | |
| cData = (vfdhd_info->floppy_sel & 0x1); /* [0] Floppy Selected */ | |
| cData |= (vfdhd_info->controller_busy & 0x1) << 1; /* [1] Controller busy */ | |
| cData |= (vfdhd_info->motor_on & 0x1) << 2; /* [2] Motor On (FD) */ | |
| cData |= (vfdhd_info->hdsk_type & 0x1) << 3; /* [3] Hard Disk Type (0=5MB, 1=10MB) */ | |
| cData |= 0xF0; /* [7:4] Reserved (pulled up) */ | |
| if(vfdhd_info->sel_drive == 0) { | |
| /* cData &= 0xF0; */ | |
| } | |
| vfdhd_info->controller_busy = 0; | |
| sim_debug(STATUS_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " RD S1 = 0x%02x\n", PCX, cData); | |
| break; | |
| case FDHD_DATA: | |
| /* DBG_PRINT(("VFDHD: " ADDRESS_FORMAT " RD Data" NLP, PCX)); */ | |
| if(vfdhd_info->datacount+40 >= VFDHD_RAW_LEN) { | |
| sim_debug(ERROR_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " Illegal data count %d.\n", PCX, vfdhd_info->datacount); | |
| vfdhd_info->datacount = 0; | |
| } | |
| cData = sdata.raw[vfdhd_info->datacount+40]; | |
| vfdhd_info->datacount++; | |
| /* DBG_PRINT(("VFDHD: " ADDRESS_FORMAT " RD Data Sector %d[%03d]: 0x%02x" NLP, PCX, pDrive->sector, vfdhd_info->datacount, cData)); */ | |
| break; | |
| case FDHD_RESET_START: /* Reset */ | |
| sim_debug(CMD_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " Reset\n", PCX); | |
| vfdhd_info->datacount = 0; | |
| cData = 0xFF; /* Return High-Z data */ | |
| break; | |
| } | |
| return (cData); | |
| } | |
| static uint8 VFDHD_Write(const uint32 Addr, uint8 cData) | |
| { | |
| VFDHD_DRIVE_INFO *pDrive; | |
| pDrive = &vfdhd_info->drive[vfdhd_info->sel_drive]; | |
| switch(Addr & 0x3) { | |
| case FDHD_CTRL_STATUS0: | |
| vfdhd_info->sel_drive = cData & 0x03; | |
| vfdhd_info->head = (cData >> 2) & 0x7; | |
| vfdhd_info->step = (cData >> 5) & 1; | |
| vfdhd_info->direction = (cData >> 6) & 1; | |
| vfdhd_info->rwc = (cData >> 7) & 1; | |
| sim_debug(WR_DATA_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " WR C0=%02x: sel_drive=%d, head=%d, step=%d, dir=%d, rwc=%d\n", PCX, cData, vfdhd_info->sel_drive, vfdhd_info->head, vfdhd_info->step, vfdhd_info->direction, vfdhd_info->rwc); | |
| if(vfdhd_info->step == 1) { | |
| if(vfdhd_info->direction == 1) { /* Step IN */ | |
| pDrive->track++; | |
| } else { /* Step OUT */ | |
| if(pDrive->track != 0) { | |
| pDrive->track--; | |
| } | |
| } | |
| sim_debug(SEEK_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " Drive %d on track %d\n", PCX, vfdhd_info->sel_drive, pDrive->track); | |
| } | |
| break; | |
| case FDHD_CTRL_STATUS1: | |
| vfdhd_info->sector = (cData & 0x1f); | |
| vfdhd_info->read = (cData >> 5) & 1; | |
| vfdhd_info->ecc_enable = (cData >> 6) & 1; | |
| vfdhd_info->precomp = (cData >> 7) & 1; | |
| if(cData == 0xFF) { | |
| sim_debug(SEEK_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " Home Disk %d\n", PCX, vfdhd_info->sel_drive); | |
| pDrive->track = 0; | |
| } | |
| DBG_PRINT(("VFDHD: " ADDRESS_FORMAT " WR C1=%02x: sector=%d, read=%d, ecc_en=%d, precomp=%d" NLP, | |
| PCX, | |
| cData, | |
| vfdhd_info->sector, | |
| vfdhd_info->read, | |
| vfdhd_info->ecc_enable, | |
| vfdhd_info->precomp)); | |
| break; | |
| case FDHD_DATA: /* Data Port */ | |
| DBG_PRINT(("VFDHD: " ADDRESS_FORMAT " WR Data" NLP, PCX)); | |
| #ifdef USE_VGI | |
| if(vfdhd_info->sel_drive > 0) { /* Floppy */ | |
| if(vfdhd_info->datacount >= VFDHD_RAW_LEN) { | |
| sim_debug(ERROR_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " Illegal data count %d.\n", PCX, vfdhd_info->datacount); | |
| vfdhd_info->datacount = 0; | |
| } | |
| sdata.raw[vfdhd_info->datacount] = cData; | |
| } else { /* Hard */ | |
| if(vfdhd_info->datacount+10 >= VFDHD_RAW_LEN) { | |
| sim_debug(ERROR_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " Illegal data count %d.\n", PCX, vfdhd_info->datacount); | |
| vfdhd_info->datacount = 0; | |
| } | |
| sdata.raw[vfdhd_info->datacount+10] = cData; | |
| } | |
| #else | |
| if((vfdhd_info->datacount-13 >= VFDHD_RAW_LEN) || (vfdhd_info->datacount < 13)) { | |
| sim_debug(ERROR_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " Illegal data count %d.\n", PCX, vfdhd_info->datacount); | |
| vfdhd_info->datacount = 13; | |
| } | |
| sdata.u.data[vfdhd_info->datacount-13] = cData; | |
| #endif /* USE_VGI */ | |
| vfdhd_info->datacount ++; | |
| break; | |
| case FDHD_RESET_START: | |
| sim_debug(CMD_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " Start Command\n", PCX); | |
| VFDHD_Command(); | |
| break; | |
| } | |
| cData = 0x00; | |
| return (cData); | |
| } | |
| static void VFDHD_Command(void) | |
| { | |
| VFDHD_DRIVE_INFO *pDrive; | |
| uint32 bytesPerTrack; | |
| uint32 bytesPerHead; | |
| uint32 sec_offset; | |
| uint32 flags; | |
| int32 rtn; | |
| pDrive = &(vfdhd_info->drive[vfdhd_info->sel_drive]); | |
| bytesPerTrack = pDrive->sectsize * pDrive->nspt; | |
| bytesPerHead = bytesPerTrack * pDrive->ntracks; | |
| sec_offset = (pDrive->track * bytesPerTrack) + \ | |
| (vfdhd_info->head * bytesPerHead) + \ | |
| (vfdhd_info->sector * pDrive->sectsize); | |
| vfdhd_info->controller_busy = 1; | |
| if(vfdhd_info->read == 1) { /* Perform a Read operation */ | |
| unsigned int i, checksum; | |
| uint32 readlen; | |
| sim_debug(RD_DATA_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " RD: Drive=%d, Track=%d, Head=%d, Sector=%d\n", PCX, vfdhd_info->sel_drive, pDrive->track, vfdhd_info->head, vfdhd_info->sector); | |
| /* Clear out unused portion of sector. */ | |
| memset(&sdata.u.unused[0], 0x00, 10); | |
| sdata.u.sync = 0xFF; | |
| sdata.u.header[0] = pDrive->track & 0xFF; | |
| sdata.u.header[1] = vfdhd_info->sector; | |
| switch((pDrive->uptr)->u3) | |
| { | |
| case IMAGE_TYPE_IMD: | |
| if(pDrive->imd == NULL) { | |
| sim_printf(".imd is NULL!" NLP); | |
| } | |
| sim_printf("%s: Read: imd=%p" NLP, __FUNCTION__, pDrive->imd); | |
| sectRead(pDrive->imd, | |
| pDrive->track, | |
| vfdhd_info->head, | |
| vfdhd_info->sector, | |
| sdata.u.data, | |
| 256, | |
| &flags, | |
| &readlen); | |
| adc(0,0); /* clear Carry bit */ | |
| checksum = 0; | |
| /* Checksum everything except the sync byte */ | |
| for(i=1;i<269;i++) { | |
| checksum = adc(checksum, sdata.raw[i+40]); | |
| } | |
| sdata.u.checksum = checksum & 0xFF; | |
| sdata.u.ecc_valid = 0xAA; | |
| break; | |
| case IMAGE_TYPE_DSK: | |
| if(pDrive->uptr->fileref == NULL) { | |
| sim_printf(".fileref is NULL!" NLP); | |
| } else { | |
| sim_fseek((pDrive->uptr)->fileref, sec_offset, SEEK_SET); | |
| rtn = sim_fread(&sdata.u.sync, 1, 274, /*VFDHD_SECTOR_LEN,*/ (pDrive->uptr)->fileref); | |
| if (rtn != 274) { | |
| sim_debug(ERROR_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " READ: sim_fread error.\n", PCX); | |
| } | |
| memset(&sdata.u.preamble, 0, 40); | |
| memset(&sdata.u.ecc, 0, 5); /* Clear out the ECC and ECC Valid bytes */ | |
| sdata.u.ecc_valid = 0xAA; | |
| for(vfdhd_info->datacount = 0; sdata.raw[vfdhd_info->datacount] == 0x00; vfdhd_info->datacount++) { | |
| } | |
| DBG_PRINT(("VFDHD: " ADDRESS_FORMAT " READ: Sync found at offset %d" NLP, PCX, vfdhd_info->datacount)); | |
| } | |
| break; | |
| case IMAGE_TYPE_CPT: | |
| sim_printf("%s: CPT Format not supported" NLP, __FUNCTION__); | |
| break; | |
| default: | |
| sim_printf("%s: Unknown image Format" NLP, __FUNCTION__); | |
| break; | |
| } | |
| } else { /* Perform a Write operation */ | |
| uint32 writelen; | |
| sim_debug(WR_DATA_MSG, &vfdhd_dev, "VFDHD: " ADDRESS_FORMAT " WR: Drive=%d, Track=%d, Head=%d, Sector=%d\n", PCX, vfdhd_info->sel_drive, pDrive->track, vfdhd_info->head, vfdhd_info->sector); | |
| #ifdef USE_VGI | |
| #else | |
| int data_index = vfdhd_info->datacount - 13; | |
| sec_offset = (pDrive->track * 4096) + \ | |
| (vfdhd_info->head * 315392) + \ | |
| (vfdhd_info->sector * 256); | |
| #endif /* USE_VGI */ | |
| switch((pDrive->uptr)->u3) | |
| { | |
| case IMAGE_TYPE_IMD: | |
| if(pDrive->imd == NULL) { | |
| sim_printf(".imd is NULL!" NLP); | |
| } | |
| sectWrite(pDrive->imd, | |
| pDrive->track, | |
| vfdhd_info->head, | |
| vfdhd_info->sector, | |
| sdata.u.data, | |
| 256, | |
| &flags, | |
| &writelen); | |
| break; | |
| case IMAGE_TYPE_DSK: | |
| if(pDrive->uptr->fileref == NULL) { | |
| sim_printf(".fileref is NULL!" NLP); | |
| } else { | |
| DBG_PRINT(("VFDHD: " ADDRESS_FORMAT " WR drive=%d, track=%d, head=%d, sector=%d" NLP, | |
| PCX, | |
| vfdhd_info->sel_drive, | |
| pDrive->track, | |
| vfdhd_info->head, | |
| vfdhd_info->sector)); | |
| sim_fseek((pDrive->uptr)->fileref, sec_offset, SEEK_SET); | |
| #ifdef USE_VGI | |
| sim_fwrite(&sdata.u.sync, 1, VFDHD_SECTOR_LEN, (pDrive->uptr)->fileref); | |
| #else | |
| sim_fwrite(sdata.u.data, 1, 256, (pDrive->uptr)->fileref); | |
| #endif /* USE_VGI */ | |
| } | |
| break; | |
| case IMAGE_TYPE_CPT: | |
| sim_printf("%s: CPT Format not supported" NLP, __FUNCTION__); | |
| break; | |
| default: | |
| sim_printf("%s: Unknown image Format" NLP, __FUNCTION__); | |
| break; | |
| } | |
| } | |
| } |