| /************************************************************************* | |
| * * | |
| * $Id: s100_disk2.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: * | |
| * CompuPro DISK2 Hard Disk Controller module for SIMH. * | |
| * This module must be used in conjunction with the CompuPro Selector * | |
| * Channel Module for proper operation. * | |
| * * | |
| * Environment: * | |
| * User mode only * | |
| * * | |
| *************************************************************************/ | |
| #include "altairz80_defs.h" | |
| #if defined (_WIN32) | |
| #include <windows.h> | |
| #endif | |
| #include "sim_imd.h" | |
| /* 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 IRQ_MSG (1 << 6) | |
| #define VERBOSE_MSG (1 << 7) | |
| #define DISK2_MAX_DRIVES 4 | |
| typedef union { | |
| uint8 raw[2051]; | |
| struct { | |
| uint8 header[3]; | |
| uint8 data[2048]; | |
| } u; | |
| } SECTOR_FORMAT; | |
| static SECTOR_FORMAT sdata; | |
| typedef struct { | |
| UNIT *uptr; | |
| DISK_INFO *imd; | |
| uint16 ntracks; /* number of tracks */ | |
| uint8 nheads; /* number of heads */ | |
| uint8 nsectors; /* number of sectors/track */ | |
| uint32 sectsize; /* sector size, not including pre/postamble */ | |
| uint16 track; /* Current Track */ | |
| uint8 ready; /* Is drive ready? */ | |
| } DISK2_DRIVE_INFO; | |
| typedef struct { | |
| PNP_INFO pnp; /* Plug and Play */ | |
| uint8 sel_drive; /* Currently selected drive */ | |
| uint8 head_sel; /* Head select (signals to drive itself) */ | |
| uint8 head; /* Head set by write to the HEAD register */ | |
| uint8 cyl; /* Cyl that the current operation is targetting */ | |
| uint8 sector; /* Sector the current READ/WRITE operation is targetting */ | |
| uint8 hdr_sector; /* Current sector for WRITE_HEADER */ | |
| uint8 ctl_attn; | |
| uint8 ctl_run; | |
| uint8 ctl_op; | |
| uint8 ctl_fault_clr; | |
| uint8 ctl_us; | |
| uint8 timeout; | |
| uint8 crc_error; | |
| uint8 overrun; | |
| uint8 seek_complete; | |
| uint8 write_fault; | |
| DISK2_DRIVE_INFO drive[DISK2_MAX_DRIVES]; | |
| } DISK2_INFO; | |
| static DISK2_INFO disk2_info_data = { { 0x0, 0, 0xC8, 2 } }; | |
| static DISK2_INFO *disk2_info = &disk2_info_data; | |
| /* Default geometry for a 20MB hard disk. */ | |
| #define C20MB_NTRACKS 243 | |
| #define C20MB_NHEADS 8 | |
| #define C20MB_NSECTORS 11 | |
| #define C20MB_SECTSIZE 1024 | |
| static int32 ntracks = C20MB_NTRACKS; | |
| static int32 nheads = C20MB_NHEADS; | |
| static int32 nsectors = C20MB_NSECTORS; | |
| static int32 sectsize = C20MB_SECTSIZE; | |
| extern uint32 PCX; | |
| extern REG *sim_PC; | |
| 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 selchan_dma(uint8 *buf, uint32 len); | |
| extern int32 find_unit_index(UNIT *uptr); | |
| extern void raise_ss1_interrupt(uint8 intnum); | |
| #define UNIT_V_DISK2_WLK (UNIT_V_UF + 0) /* write locked */ | |
| #define UNIT_DISK2_WLK (1 << UNIT_V_DISK2_WLK) | |
| #define UNIT_V_DISK2_VERBOSE (UNIT_V_UF + 1) /* verbose mode, i.e. show error messages */ | |
| #define UNIT_DISK2_VERBOSE (1 << UNIT_V_DISK2_VERBOSE) | |
| #define DISK2_CAPACITY (C20MB_NTRACKS*C20MB_NHEADS*C20MB_NSECTORS*C20MB_SECTSIZE) /* Default Disk Capacity */ | |
| #define IMAGE_TYPE_DSK 1 /* Flat binary "DSK" image file. */ | |
| #define IMAGE_TYPE_IMD 2 /* ImageDisk "IMD" image file. */ | |
| #define IMAGE_TYPE_CPT 3 /* CP/M Transfer "CPT" image file. */ | |
| static t_stat disk2_reset(DEVICE *disk2_dev); | |
| static t_stat disk2_attach(UNIT *uptr, char *cptr); | |
| static t_stat disk2_detach(UNIT *uptr); | |
| static void raise_disk2_interrupt(void); | |
| static int32 disk2dev(const int32 port, const int32 io, const int32 data); | |
| static uint8 DISK2_Read(const uint32 Addr); | |
| static uint8 DISK2_Write(const uint32 Addr, uint8 cData); | |
| static UNIT disk2_unit[] = { | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, DISK2_CAPACITY) }, | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, DISK2_CAPACITY) }, | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, DISK2_CAPACITY) }, | |
| { UDATA (NULL, UNIT_FIX + UNIT_ATTABLE + UNIT_DISABLE + UNIT_ROABLE, DISK2_CAPACITY) } | |
| }; | |
| static REG disk2_reg[] = { | |
| { DRDATA (NTRACKS, ntracks, 10), }, | |
| { DRDATA (NHEADS, nheads, 8), }, | |
| { DRDATA (NSECTORS, nsectors, 8), }, | |
| { DRDATA (SECTSIZE, sectsize, 11), }, | |
| { HRDATA (SEL_DRIVE, disk2_info_data.sel_drive, 3), }, | |
| { HRDATA (CYL, disk2_info_data.cyl, 8), }, | |
| { HRDATA (HEAD, disk2_info_data.head, 8), }, | |
| { HRDATA (SECTOR, disk2_info_data.sector, 8), }, | |
| { NULL } | |
| }; | |
| static MTAB disk2_mod[] = { | |
| { MTAB_XTD|MTAB_VDV, 0, "IOBASE", "IOBASE", &set_iobase, &show_iobase, NULL }, | |
| { UNIT_DISK2_WLK, 0, "WRTENB", "WRTENB", NULL }, | |
| { UNIT_DISK2_WLK, UNIT_DISK2_WLK, "WRTLCK", "WRTLCK", NULL }, | |
| /* quiet, no warning messages */ | |
| { UNIT_DISK2_VERBOSE, 0, "QUIET", "QUIET", NULL }, | |
| /* verbose, show warning messages */ | |
| { UNIT_DISK2_VERBOSE, UNIT_DISK2_VERBOSE, "VERBOSE", "VERBOSE", NULL }, | |
| { 0 } | |
| }; | |
| #define TRACE_PRINT(level, args) if(disk2_dev.dctrl & level) { \ | |
| printf args; \ | |
| } | |
| /* Debug Flags */ | |
| static DEBTAB disk2_dt[] = { | |
| { "ERROR", ERROR_MSG }, | |
| { "SEEK", SEEK_MSG }, | |
| { "CMD", CMD_MSG }, | |
| { "RDDATA", RD_DATA_MSG }, | |
| { "WRDATA", WR_DATA_MSG }, | |
| { "STATUS", STATUS_MSG }, | |
| { "IRQ", IRQ_MSG }, | |
| { "VERBOSE",VERBOSE_MSG }, | |
| { NULL, 0 } | |
| }; | |
| DEVICE disk2_dev = { | |
| "DISK2", disk2_unit, disk2_reg, disk2_mod, | |
| DISK2_MAX_DRIVES, 10, 31, 1, DISK2_MAX_DRIVES, DISK2_MAX_DRIVES, | |
| NULL, NULL, &disk2_reset, | |
| NULL, &disk2_attach, &disk2_detach, | |
| &disk2_info_data, (DEV_DISABLE | DEV_DIS | DEV_DEBUG), ERROR_MSG, | |
| disk2_dt, NULL, "Compupro Hard Disk Controller DISK2" | |
| }; | |
| /* Reset routine */ | |
| static t_stat disk2_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, &disk2dev, TRUE); | |
| } else { | |
| /* Connect DISK2 at base address */ | |
| if(sim_map_resource(pnp->io_base, pnp->io_size, RESOURCE_TYPE_IO, &disk2dev, FALSE) != 0) { | |
| 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 disk2_attach(UNIT *uptr, char *cptr) | |
| { | |
| t_stat r = SCPE_OK; | |
| DISK2_DRIVE_INFO *pDrive; | |
| char header[4]; | |
| int i = 0; | |
| i = find_unit_index(uptr); | |
| if (i == -1) { | |
| return (SCPE_IERR); | |
| } | |
| pDrive = &disk2_info->drive[i]; | |
| pDrive->ready = 1; | |
| disk2_info->write_fault = 1; | |
| pDrive->track = 5; | |
| pDrive->ntracks = ntracks; | |
| pDrive->nheads = nheads; | |
| pDrive->nsectors = nsectors; | |
| pDrive->sectsize = sectsize; | |
| r = attach_unit(uptr, cptr); /* attach unit */ | |
| if ( r != SCPE_OK) /* error? */ | |
| return r; | |
| /* Determine length of this disk */ | |
| if(sim_fsize(uptr->fileref) != 0) { | |
| uptr->capac = sim_fsize(uptr->fileref); | |
| } else { | |
| uptr->capac = (pDrive->ntracks * pDrive->nsectors * pDrive->nheads * pDrive->sectsize); | |
| } | |
| pDrive->uptr = uptr; | |
| /* Default for new file is DSK */ | |
| uptr->u3 = IMAGE_TYPE_DSK; | |
| if(uptr->capac > 0) { | |
| fgets(header, 4, uptr->fileref); | |
| if(!strcmp(header, "IMD")) { | |
| uptr->u3 = IMAGE_TYPE_IMD; | |
| } else if(!strcmp(header, "CPT")) { | |
| printf("CPT images not yet supported\n"); | |
| uptr->u3 = IMAGE_TYPE_CPT; | |
| disk2_detach(uptr); | |
| return SCPE_OPENERR; | |
| } else { | |
| uptr->u3 = IMAGE_TYPE_DSK; | |
| } | |
| } | |
| if (uptr->flags & UNIT_DISK2_VERBOSE) | |
| printf("DISK2%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) { | |
| printf("Cannot create IMD files with SIMH.\nCopy an existing file and format it with CP/M.\n"); | |
| disk2_detach(uptr); | |
| return SCPE_OPENERR; | |
| } | |
| if (uptr->flags & UNIT_DISK2_VERBOSE) | |
| printf("--------------------------------------------------------\n"); | |
| disk2_info->drive[i].imd = diskOpen((uptr->fileref), (uptr->flags & UNIT_DISK2_VERBOSE)); | |
| if (uptr->flags & UNIT_DISK2_VERBOSE) | |
| printf("\n"); | |
| } else { | |
| disk2_info->drive[i].imd = NULL; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Detach routine */ | |
| t_stat disk2_detach(UNIT *uptr) | |
| { | |
| t_stat r; | |
| int8 i; | |
| i = find_unit_index(uptr); | |
| if (i == -1) { | |
| return (SCPE_IERR); | |
| } | |
| if (uptr->flags & UNIT_DISK2_VERBOSE) | |
| printf("Detach DISK2%d\n", i); | |
| r = detach_unit(uptr); /* detach unit */ | |
| if ( r != SCPE_OK) | |
| return r; | |
| return SCPE_OK; | |
| } | |
| static int32 disk2dev(const int32 port, const int32 io, const int32 data) | |
| { | |
| /* TRACE_PRINT(VERBOSE_MSG, ("DISK2: " ADDRESS_FORMAT " IO %s, Port %02x" NLP, PCX, io ? "WR" : "RD", port)); */ | |
| if(io) { | |
| DISK2_Write(port, data); | |
| return 0; | |
| } else { | |
| return(DISK2_Read(port)); | |
| } | |
| } | |
| #define DISK2_CSR 0 /* R=DISK2 Status / W=DISK2 Control Register */ | |
| #define DISK2_DATA 1 /* R=Step Pulse / W=Write Data Register */ | |
| static uint8 DISK2_Read(const uint32 Addr) | |
| { | |
| uint8 cData; | |
| DISK2_DRIVE_INFO *pDrive; | |
| pDrive = &disk2_info->drive[disk2_info->sel_drive]; | |
| cData = 0x00; | |
| switch(Addr & 0x1) { | |
| case DISK2_CSR: | |
| cData = (disk2_info->ctl_attn) << 7; | |
| cData |= (disk2_info->timeout) << 6; | |
| cData |= (disk2_info->crc_error) << 5; | |
| cData |= (disk2_info->overrun) << 4; | |
| cData |= (pDrive->ready == 0) ? 0x08 : 0x00; | |
| cData |= (disk2_info->seek_complete == 0) ? 0x04 : 0x00; | |
| cData |= (disk2_info->write_fault) << 1; | |
| cData |= ((pDrive->track != 0) || (disk2_info->seek_complete == 0)) ? 0x01 : 0x00; | |
| TRACE_PRINT(STATUS_MSG, ("DISK2: " ADDRESS_FORMAT " RD STATUS = 0x%02x" NLP, PCX, cData)); | |
| disk2_info->seek_complete = 1; | |
| break; | |
| case DISK2_DATA: | |
| if(disk2_info->ctl_op & 0x04) { | |
| if(pDrive->track < pDrive->ntracks) { | |
| pDrive->track ++; | |
| } | |
| } else { | |
| if(pDrive->track > 0) { | |
| pDrive->track --; | |
| } | |
| } | |
| TRACE_PRINT(SEEK_MSG, ("DISK2: " ADDRESS_FORMAT " Step %s, Track=%d" NLP, | |
| PCX, disk2_info->ctl_op & 0x04 ? "IN" : "OUT", pDrive->track)); | |
| disk2_info->seek_complete = 0; | |
| cData = 0xFF; /* Return High-Z data */ | |
| break; | |
| } | |
| return (cData); | |
| } | |
| #define DISK2_OP_DRIVE 0x00 | |
| #define DISK2_OP_CYL 0x01 | |
| #define DISK2_OP_HEAD 0x02 | |
| #define DISK2_OP_SECTOR 0x03 | |
| #define DISK2_CMD_NULL 0x00 | |
| #define DISK2_CMD_READ_DATA 0x01 | |
| #define DISK2_CMD_WRITE_DATA 0x02 | |
| #define DISK2_CMD_WRITE_HEADER 0x03 | |
| #define DISK2_CMD_READ_HEADER 0x04 | |
| static uint8 DISK2_Write(const uint32 Addr, uint8 cData) | |
| { | |
| uint32 track_offset; | |
| uint8 result = 0; | |
| uint8 i; | |
| long file_offset; | |
| DISK2_DRIVE_INFO *pDrive; | |
| pDrive = &disk2_info->drive[disk2_info->sel_drive]; | |
| switch(Addr & 0x1) { | |
| case DISK2_CSR: /* Write CTL register */ | |
| disk2_info->ctl_attn = (cData & 0x80) >> 7; | |
| disk2_info->ctl_run = (cData & 0x40) >> 6; | |
| disk2_info->ctl_op = (cData & 0x38) >> 3; | |
| disk2_info->ctl_fault_clr = (cData & 0x04) >> 2; | |
| if(disk2_info->ctl_fault_clr == 1) { | |
| disk2_info->timeout = 0; | |
| } | |
| disk2_info->ctl_us = (cData & 0x03); | |
| TRACE_PRINT(VERBOSE_MSG, ("DISK2: " ADDRESS_FORMAT " ATTN*=%d, RUN=%d, OP=%d, FAULT_CLR=%d, US=%d" NLP, | |
| PCX, | |
| disk2_info->ctl_attn, | |
| disk2_info->ctl_run, | |
| disk2_info->ctl_op, | |
| disk2_info->ctl_fault_clr, | |
| disk2_info->ctl_us)); | |
| /* FIXME: seek_complete = 1 is needed by CP/M, but why? Also, maybe related, | |
| * there appears to be a bug in the seeking logic. For some reason, the | |
| * pDrive->track does not equal the disk2_info->cyl, when doing READ_DATA and | |
| * WRITE_DATA commands. For this reason, disk2_info->cyl is used instead of | |
| * pDrive->track for these commands. For READ_HEADER and WRITE_HEADER, | |
| * pDrive->track is used, because the DISK2 format program (DISK2.COM) does not | |
| * issue DISK2_OP_CYL. The root cause of this anomaly needs to be determined, | |
| * because it is surely a bug in the logic somewhere. | |
| */ | |
| /* pDrive->track may be different from disk2_info->cyl when a program such as DISK2.COM | |
| moves the position of the track without informing the CP/M BIOS which stores the | |
| current track for each drive. This appears to be an application program bug. | |
| */ | |
| disk2_info->seek_complete = 1; | |
| if(disk2_info->ctl_run == 1) { | |
| disk2_info->timeout = 0; | |
| track_offset = disk2_info->cyl * pDrive->nheads * pDrive->nsectors * (pDrive->sectsize + 3); | |
| switch(disk2_info->ctl_op) { | |
| case DISK2_CMD_NULL: | |
| TRACE_PRINT(CMD_MSG, ("DISK2: " ADDRESS_FORMAT " NULL Command" NLP, PCX)); | |
| break; | |
| case DISK2_CMD_READ_DATA: | |
| TRACE_PRINT(RD_DATA_MSG, ("DISK2: " ADDRESS_FORMAT " READ_DATA: (C:%d/H:%d/S:%d)" NLP, | |
| PCX, | |
| disk2_info->cyl, | |
| disk2_info->head, | |
| disk2_info->sector)); | |
| if(disk2_info->head_sel != disk2_info->head) { | |
| printf("DISK2: " ADDRESS_FORMAT " READ_DATA: head_sel != head" NLP, PCX); | |
| } | |
| /* See FIXME above... that might be why this does not work properly... */ | |
| if(disk2_info->cyl != pDrive->track) { /* problem, should not happen, see above */ | |
| TRACE_PRINT(ERROR_MSG, ("DISK2: " ADDRESS_FORMAT " READ_DATA: cyl=%d, track=%d" NLP, | |
| PCX, disk2_info->cyl, pDrive->track)); | |
| pDrive->track = disk2_info->cyl; /* update track */ | |
| } | |
| sim_fseek((pDrive->uptr)->fileref, track_offset + (disk2_info->head_sel * pDrive->nsectors * (pDrive->sectsize + 3)), SEEK_SET); | |
| for(i=0;i<pDrive->nsectors;i++) { | |
| /* Read sector */ | |
| fread(sdata.raw, (pDrive->sectsize + 3), 1, (pDrive->uptr)->fileref); | |
| if(sdata.u.header[2] == disk2_info->sector) { | |
| if(sdata.u.header[0] != disk2_info->cyl) { /*pDrive->track) { */ | |
| printf("DISK2: " ADDRESS_FORMAT " READ_DATA Incorrect header: track" NLP, PCX); | |
| disk2_info->timeout = 1; | |
| } | |
| if(sdata.u.header[1] != disk2_info->head) { | |
| printf("DISK2: " ADDRESS_FORMAT " READ_DATA Incorrect header: head" NLP, PCX); | |
| disk2_info->timeout = 1; | |
| } | |
| selchan_dma(sdata.u.data, pDrive->sectsize); | |
| break; | |
| } | |
| if(i == pDrive->nsectors) { | |
| printf("DISK2: " ADDRESS_FORMAT " Sector not found" NLP, PCX); | |
| disk2_info->timeout = 1; | |
| } | |
| } | |
| break; | |
| case DISK2_CMD_WRITE_DATA: | |
| TRACE_PRINT(WR_DATA_MSG, ("DISK2: " ADDRESS_FORMAT " WRITE_DATA: (C:%d/H:%d/S:%d)" NLP, | |
| PCX, | |
| disk2_info->cyl, | |
| disk2_info->head, | |
| disk2_info->sector)); | |
| if(disk2_info->head_sel != disk2_info->head) { | |
| printf("DISK2: " ADDRESS_FORMAT " WRITE_DATA: head_sel != head" NLP, PCX); | |
| } | |
| if(disk2_info->cyl != pDrive->track) { /* problem, should not happen, see above */ | |
| TRACE_PRINT(ERROR_MSG, ("DISK2: " ADDRESS_FORMAT " WRITE_DATA = 0x%02x, cyl=%d, track=%d" NLP, | |
| PCX, cData, disk2_info->cyl, pDrive->track)); | |
| pDrive->track = disk2_info->cyl; /* update track */ | |
| } | |
| sim_fseek((pDrive->uptr)->fileref, track_offset + (disk2_info->head_sel * pDrive->nsectors * (pDrive->sectsize + 3)), SEEK_SET); | |
| for(i=0;i<pDrive->nsectors;i++) { | |
| /* Read sector */ | |
| file_offset = ftell((pDrive->uptr)->fileref); | |
| fread(sdata.raw, 3, 1, (pDrive->uptr)->fileref); | |
| if(sdata.u.header[2] == disk2_info->sector) { | |
| if(sdata.u.header[0] != disk2_info->cyl) { | |
| printf("DISK2: " ADDRESS_FORMAT " WRITE_DATA Incorrect header: track" NLP, PCX); | |
| disk2_info->timeout = 1; | |
| } | |
| if(sdata.u.header[1] != disk2_info->head) { | |
| printf("DISK2: " ADDRESS_FORMAT " WRITE_DATA Incorrect header: head" NLP, PCX); | |
| disk2_info->timeout = 1; | |
| } | |
| selchan_dma(sdata.u.data, pDrive->sectsize); | |
| sim_fseek((pDrive->uptr)->fileref, file_offset+3, SEEK_SET); | |
| fwrite(sdata.u.data, (pDrive->sectsize), 1, (pDrive->uptr)->fileref); | |
| break; | |
| } | |
| fread(sdata.raw, pDrive->sectsize, 1, (pDrive->uptr)->fileref); | |
| if(i == pDrive->nsectors) { | |
| printf("DISK2: " ADDRESS_FORMAT " Sector not found" NLP, PCX); | |
| disk2_info->timeout = 1; | |
| } | |
| } | |
| break; | |
| case DISK2_CMD_WRITE_HEADER: | |
| track_offset = pDrive->track * pDrive->nheads * pDrive->nsectors * (pDrive->sectsize + 3); | |
| TRACE_PRINT(CMD_MSG, ("DISK2: " ADDRESS_FORMAT " WRITE_HEADER Command: track=%d (%d), Head=%d, Sector=%d" NLP, | |
| PCX, | |
| pDrive->track, | |
| disk2_info->cyl, | |
| disk2_info->head_sel, | |
| disk2_info->hdr_sector)); | |
| i = disk2_info->hdr_sector; | |
| selchan_dma(sdata.raw, 3); | |
| sim_fseek((pDrive->uptr)->fileref, track_offset + (disk2_info->head_sel * (pDrive->sectsize + 3) * pDrive->nsectors) + (i * (pDrive->sectsize + 3)), SEEK_SET); | |
| fwrite(sdata.raw, 3, 1, (pDrive->uptr)->fileref); | |
| disk2_info->hdr_sector++; | |
| if(disk2_info->hdr_sector >= pDrive->nsectors) { | |
| disk2_info->hdr_sector = 0; | |
| disk2_info->timeout = 1; | |
| } | |
| break; | |
| case DISK2_CMD_READ_HEADER: | |
| track_offset = pDrive->track * pDrive->nheads * pDrive->nsectors * (pDrive->sectsize + 3); | |
| TRACE_PRINT(CMD_MSG, ("DISK2: " ADDRESS_FORMAT " READ_HEADER Command" NLP, PCX)); | |
| sim_fseek((pDrive->uptr)->fileref, track_offset + (disk2_info->head_sel * pDrive->nsectors * (pDrive->sectsize + 3)), SEEK_SET); | |
| fread(sdata.raw, 3, 1, (pDrive->uptr)->fileref); | |
| selchan_dma(sdata.raw, 3); | |
| break; | |
| default: | |
| printf("DISK2: " ADDRESS_FORMAT " Unknown CMD=%d" NLP, PCX, disk2_info->ctl_op); | |
| break; | |
| } | |
| raise_disk2_interrupt(); | |
| disk2_info->ctl_attn = 0; | |
| } | |
| break; | |
| case DISK2_DATA: | |
| switch(disk2_info->ctl_op) { | |
| case DISK2_OP_DRIVE: | |
| switch(cData >> 4) { | |
| case 0x01: | |
| disk2_info->sel_drive = 0; | |
| break; | |
| case 0x02: | |
| disk2_info->sel_drive = 1; | |
| break; | |
| case 0x04: | |
| disk2_info->sel_drive = 2; | |
| break; | |
| case 0x08: | |
| disk2_info->sel_drive = 3; | |
| break; | |
| default: | |
| printf("DISK2: " ADDRESS_FORMAT " Error, invalid drive select=0x%x" NLP, PCX, cData >> 4); | |
| break; | |
| } | |
| disk2_info->head_sel = cData & 0x0F; | |
| TRACE_PRINT(VERBOSE_MSG, ("DISK2: " ADDRESS_FORMAT " Write DATA [DRIVE]=%d, Head=%d" NLP, | |
| PCX, disk2_info->sel_drive, disk2_info->head)); | |
| break; | |
| case DISK2_OP_CYL: | |
| disk2_info->cyl = cData; | |
| TRACE_PRINT(VERBOSE_MSG, ("DISK2: " ADDRESS_FORMAT " Write DATA [CYL] = %02x" NLP, | |
| PCX, cData)); | |
| break; | |
| case DISK2_OP_HEAD: | |
| disk2_info->head = cData; | |
| TRACE_PRINT(VERBOSE_MSG, ("DISK2: " ADDRESS_FORMAT " Write DATA [HEAD] = %02x" NLP, | |
| PCX, cData)); | |
| break; | |
| case DISK2_OP_SECTOR: | |
| disk2_info->sector = cData; | |
| TRACE_PRINT(VERBOSE_MSG, ("DISK2: " ADDRESS_FORMAT " Write Register [SECTOR] = %02x" NLP, | |
| PCX, cData)); | |
| break; | |
| default: | |
| TRACE_PRINT(VERBOSE_MSG, ("DISK2: " ADDRESS_FORMAT " Write Register unknown op [%d] = %02x" NLP, | |
| PCX, disk2_info->ctl_op, cData)); | |
| break; | |
| } | |
| } | |
| return (result); | |
| } | |
| #define SS1_VI1_INT 1 /* DISK2/DISK3 interrupts tied to VI1 */ | |
| static void raise_disk2_interrupt(void) | |
| { | |
| TRACE_PRINT(IRQ_MSG, ("DISK2: " ADDRESS_FORMAT " Interrupt" NLP, PCX)); | |
| raise_ss1_interrupt(SS1_VI1_INT); | |
| } |