/* Attach routine */
t_stat mfdc_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 */
if(sim_fsize(uptr->fileref) != 0) {
uptr->capac = sim_fsize(uptr->fileref);
} else {
uptr->capac = MFDC_CAPACITY;
}
i = find_unit_index(uptr);
/* Default for new file is DSK */
uptr->u3 = IMAGE_TYPE_DSK;
if(uptr->capac > 0) {
r = assignDiskType(uptr);
if (r != SCPE_OK) {
mfdc_detach(uptr);
return r;
}
}
if (uptr->flags & UNIT_MFDC_VERBOSE)
printf("MDSK%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");
mfdc_detach(uptr);
return SCPE_OPENERR;
}
if (uptr->flags & UNIT_MFDC_VERBOSE)
printf("--------------------------------------------------------\n");
mfdc_info->drive[i].imd = diskOpen((uptr->fileref), (uptr->flags & UNIT_MFDC_VERBOSE));
if (uptr->flags & UNIT_MFDC_VERBOSE)
printf("\n");
} else {
mfdc_info->drive[i].imd = NULL;
}
return SCPE_OK;
}
/* Attach routine */
static t_stat mdsad_attach(UNIT *uptr, CONST char *cptr)
{
char header[4];
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 */
if(sim_fsize(uptr->fileref) != 0) {
uptr->capac = sim_fsize(uptr->fileref);
} else {
uptr->capac = MDSAD_CAPACITY;
}
for(i = 0; i < MDSAD_MAX_DRIVES; i++) {
mdsad_info->drive[i].uptr = &mdsad_dev.units[i];
}
for(i = 0; i < MDSAD_MAX_DRIVES; i++) {
if(mdsad_dev.units[i].fileref == uptr->fileref) {
break;
}
mdsad_info->orders.st = 0; /* ensure valid state */
}
/* Default for new file is DSK */
uptr->u3 = IMAGE_TYPE_DSK;
if(uptr->capac > 0) {
char *rtn = fgets(header, 4, uptr->fileref);
if((rtn != NULL) && (strncmp(header, "CPT", 3) == 0)) {
sim_printf("CPT images not yet supported\n");
uptr->u3 = IMAGE_TYPE_CPT;
mdsad_detach(uptr);
return SCPE_OPENERR;
} else {
uptr->u3 = IMAGE_TYPE_DSK;
}
}
if (uptr->flags & UNIT_MDSAD_VERBOSE)
sim_printf("MDSAD%d, attached to '%s', type=%s, len=%d\n", i, cptr,
uptr->u3 == IMAGE_TYPE_CPT ? "CPT" : "DSK",
uptr->capac);
return SCPE_OK;
}
uint32 sim_fsize_name (char *fname)
{
FILE *fp;
uint32 sz;
if ((fp = sim_fopen (fname, "rb")) == NULL) return 0;
sz = sim_fsize (fp);
fclose (fp);
return sz;
}
/* Attach routine */
static t_stat disk3_attach(UNIT *uptr, char *cptr)
{
t_stat r = SCPE_OK;
DISK3_DRIVE_INFO *pDrive;
int i = 0;
i = find_unit_index(uptr);
if (i == -1) {
return (SCPE_IERR);
}
pDrive = &disk3_info->drive[i];
pDrive->ready = 1;
pDrive->track = 5;
pDrive->ntracks = C20MB_NTRACKS;
pDrive->nheads = C20MB_NHEADS;
pDrive->nsectors = C20MB_NSECTORS;
pDrive->sectsize = C20MB_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) {
r = assignDiskType(uptr);
if (r != SCPE_OK) {
disk3_detach(uptr);
return r;
}
}
if (uptr->flags & UNIT_DISK3_VERBOSE)
printf("DISK3%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");
disk3_detach(uptr);
return SCPE_OPENERR;
}
if (uptr->flags & UNIT_DISK3_VERBOSE)
printf("--------------------------------------------------------\n");
disk3_info->drive[i].imd = diskOpenEx((uptr->fileref), (uptr->flags & UNIT_DISK3_VERBOSE),
&disk3_dev, VERBOSE_MSG, VERBOSE_MSG);
if (uptr->flags & UNIT_DISK3_VERBOSE)
printf("\n");
} else {
disk3_info->drive[i].imd = NULL;
}
return SCPE_OK;
}
/* Attach routine */
static t_stat hdc1001_attach(UNIT *uptr, char *cptr)
{
t_stat r = SCPE_OK;
HDC1001_DRIVE_INFO *pDrive;
char header[4];
unsigned int i = 0;
i = find_unit_index(uptr);
if (i == -1) {
return (SCPE_IERR);
}
pDrive = &hdc1001_info->drive[i];
pDrive->ready = 1;
pDrive->track = 5;
pDrive->ntracks = 243;
pDrive->nheads = 8;
pDrive->nsectors = 11;
pDrive->sectsize = 1024;
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;
hdc1001_detach(uptr);
return SCPE_OPENERR;
} else {
uptr->u3 = IMAGE_TYPE_DSK;
}
}
if (uptr->flags & UNIT_HDC1001_VERBOSE)
printf("HDC1001%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");
hdc1001_detach(uptr);
return SCPE_OPENERR;
}
if (uptr->flags & UNIT_HDC1001_VERBOSE)
printf("--------------------------------------------------------\n");
hdc1001_info->drive[i].imd = diskOpen((uptr->fileref), (uptr->flags & UNIT_HDC1001_VERBOSE));
if (uptr->flags & UNIT_HDC1001_VERBOSE)
printf("\n");
} else {
hdc1001_info->drive[i].imd = NULL;
}
return SCPE_OK;
}
uint8 I8272_Write(const uint32 Addr, uint8 cData)
{
I8272_DRIVE_INFO *pDrive;
uint32 flags = 0;
uint32 readlen;
uint8 disk_read = 0;
int32 i;
pDrive = &i8272_info->drive[i8272_info->sel_drive];
if(pDrive->uptr == NULL) {
return 0xFF;
}
switch(Addr & 0x3) {
case I8272_FDC_MSR:
sim_debug(WR_DATA_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" WR Drive Select Reg=%02x\n", PCX, cData);
break;
case I8272_FDC_DATA:
i8272_info->fdc_msr &= 0xF0;
sim_debug(VERBOSE_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" WR Data, phase=%d, index=%d\n",
PCX, i8272_info->fdc_phase, i8272_info->cmd_index);
if(i8272_info->fdc_phase == CMD_PHASE) {
i8272_info->cmd[i8272_info->cmd_index] = cData;
if(i8272_info->cmd_index == 0) {
sim_debug(CMD_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" CMD=0x%02x[%s]\n", PCX, cData & 0x1F, messages[cData & 0x1F]);
I8272_Setup_Cmd(cData & 0x1F);
}
i8272_info->cmd_index ++;
if(i8272_info->cmd_len == i8272_info->cmd_index) {
i8272_info->cmd_index = 0;
i8272_info->fdc_phase = EXEC_PHASE;
}
}
if(i8272_info->fdc_phase == EXEC_PHASE) {
switch(i8272_info->cmd[0] & 0x1F) {
case I8272_READ_DATA:
case I8272_WRITE_DATA:
case I8272_READ_DELETED_DATA:
case I8272_WRITE_DELETED_DATA:
case I8272_READ_TRACK:
case I8272_SCAN_LOW_EQUAL:
case I8272_SCAN_HIGH_EQUAL:
case I8272_SCAN_EQUAL:
i8272_info->fdc_mt = (i8272_info->cmd[0] & 0x80) >> 7;
i8272_info->fdc_mfm = (i8272_info->cmd[0] & 0x40) >> 6;
i8272_info->fdc_sk = (i8272_info->cmd[0] & 0x20) >> 5;
i8272_info->fdc_hds = (i8272_info->cmd[1] & 0x04) >> 2;
i8272_info->sel_drive = (i8272_info->cmd[1] & 0x03);
pDrive = &i8272_info->drive[i8272_info->sel_drive];
if(pDrive->uptr == NULL) {
return 0xFF;
}
if(pDrive->track != i8272_info->cmd[2]) {
i8272_info->fdc_seek_end = 1;
} else {
i8272_info->fdc_seek_end = 0;
}
if(pDrive->track != i8272_info->cmd[2]) {
sim_debug(CMD_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" ERROR: CMD=0x%02x[%s]: Drive: %d, Command wants track %d, "
"but positioner is on track %d.\n",
PCX, i8272_info->cmd[0] & 0x1F,
messages[i8272_info->cmd[0] & 0x1F],
i8272_info->sel_drive, i8272_info->cmd[2], pDrive->track);
}
pDrive->track = i8272_info->cmd[2];
i8272_info->fdc_head = i8272_info->cmd[3] & 1; /* AGN mask to head 0 or 1 */
i8272_info->fdc_sector = i8272_info->cmd[4];
i8272_info->fdc_sec_len = i8272_info->cmd[5];
if(i8272_info->fdc_sec_len > I8272_MAX_N) {
sim_debug(ERROR_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Illegal sector size %d [N=%d]. Reset to %d [N=%d].\n",
PCX, 128 << i8272_info->fdc_sec_len,
i8272_info->fdc_sec_len, 128 << I8272_MAX_N, I8272_MAX_N);
i8272_info->fdc_sec_len = I8272_MAX_N;
}
i8272_info->fdc_eot = i8272_info->cmd[6];
i8272_info->fdc_gpl = i8272_info->cmd[7];
i8272_info->fdc_dtl = i8272_info->cmd[8];
sim_debug(CMD_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" CMD=0x%02x[%s]: Drive: %d, %s %s, C=%d. H=%d. S=%d, N=%d, "
"EOT=%02x, GPL=%02x, DTL=%02x\n", PCX,
i8272_info->cmd[0] & 0x1F,
messages[i8272_info->cmd[0] & 0x1F],
i8272_info->sel_drive,
i8272_info->fdc_mt ? "Multi" : "Single",
i8272_info->fdc_mfm ? "MFM" : "FM",
pDrive->track,
i8272_info->fdc_head,
i8272_info->fdc_sector,
i8272_info->fdc_sec_len,
i8272_info->fdc_eot,
i8272_info->fdc_gpl,
i8272_info->fdc_dtl);
i8272_info->fdc_status[0] = (i8272_info->fdc_hds & 1) << 2;
i8272_info->fdc_status[0] |= (i8272_info->sel_drive & 0x03);
i8272_info->fdc_status[0] |= 0x40;
i8272_info->fdc_status[1] = 0;
i8272_info->fdc_status[2] = 0;
i8272_info->result[0] = i8272_info->fdc_status[0];
i8272_info->result[1] = i8272_info->fdc_status[1];
i8272_info->result[2] = i8272_info->fdc_status[2];
i8272_info->result[3] = pDrive->imd->track[pDrive->track][i8272_info->fdc_head].logicalCyl[i8272_info->fdc_sector]; /* AGN logicalCyl */
i8272_info->result[4] = pDrive->imd->track[pDrive->track][i8272_info->fdc_head].logicalHead[i8272_info->fdc_sector]; /* AGN logicalHead */
i8272_info->result[5] = i8272_info->fdc_sector;
i8272_info->result[6] = i8272_info->fdc_sec_len;
break;
case I8272_READ_ID: /* READ ID */
i8272_info->fdc_mfm = (i8272_info->cmd[0] & 0x40) >> 6;
i8272_info->fdc_hds = (i8272_info->cmd[1] & 0x04) >> 2;
i8272_info->sel_drive = (i8272_info->cmd[1] & 0x03);
pDrive = &i8272_info->drive[i8272_info->sel_drive];
if(pDrive->uptr == NULL) {
return 0xFF;
}
/* Compute the i8272 "N" value from the sectorsize of this */
/* disk's current track - i.e. N = log2(sectsize) - log2(128) */
/* The calculation also works for non-standard format disk images with */
/* sectorsizes of 2048, 4096 and 8192 bytes */
i8272_info->fdc_sec_len = floorlog2(
pDrive->imd->track[pDrive->track][i8272_info->fdc_hds].sectsize) - 7; /* AGN fix to use fdc_hds (was fdc_head)*/
/* For now always return the starting sector number */
/* but could return (say) a valid sector number based */
/* on elapsed time for a more "realistic" simulation. */
/* This would allow disk analysis programs that use */
/* READID to detect non-standard disk formats. */
i8272_info->fdc_sector = pDrive->imd->track[pDrive->track][i8272_info->fdc_hds].start_sector;
if((i8272_info->fdc_sec_len == 0xF8) || (i8272_info->fdc_sec_len > I8272_MAX_N)) { /* Error calculating N or N too large */
sim_debug(ERROR_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Illegal sector size N=%d. Reset to 0.\n",
PCX, i8272_info->fdc_sec_len);
i8272_info->fdc_sec_len = 0;
return 0xFF;
}
i8272_info->fdc_status[0] = (i8272_info->fdc_hds & 1) << 2;
i8272_info->fdc_status[0] |= (i8272_info->sel_drive & 0x03);
i8272_info->fdc_status[1] = 0;
i8272_info->fdc_status[2] = 0;
i8272_info->result[0] = i8272_info->fdc_status[0];
i8272_info->result[1] = i8272_info->fdc_status[1];
i8272_info->result[2] = i8272_info->fdc_status[2];
i8272_info->result[3] = pDrive->imd->track[pDrive->track][i8272_info->fdc_hds].logicalCyl[i8272_info->fdc_sector]; /* AGN logicalCyl */
i8272_info->result[4] = pDrive->imd->track[pDrive->track][i8272_info->fdc_hds].logicalHead[i8272_info->fdc_sector]; /* AGN logicalHead */
i8272_info->result[5] = i8272_info->fdc_sector;
i8272_info->result[6] = i8272_info->fdc_sec_len;
break;
case I8272_RECALIBRATE: /* RECALIBRATE */
i8272_info->sel_drive = i8272_info->cmd[1] & 0x03;
pDrive = &i8272_info->drive[i8272_info->sel_drive];
if(pDrive->uptr == NULL) {
return 0xFF;
}
pDrive->track = 0;
i8272_info->fdc_phase = CMD_PHASE; /* No result phase */
i8272_info->fdc_seek_end = 1;
sim_debug(SEEK_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Recalibrate: Drive 0x%02x\n",
PCX, i8272_info->sel_drive);
break;
case I8272_FORMAT_TRACK: /* FORMAT A TRACK */
i8272_info->fdc_mfm = (i8272_info->cmd[0] & 0x40) >> 6;
i8272_info->fdc_hds = (i8272_info->cmd[1] & 0x04) >> 2;
i8272_info->fdc_head = i8272_info->fdc_hds;
i8272_info->sel_drive = (i8272_info->cmd[1] & 0x03);
pDrive = &i8272_info->drive[i8272_info->sel_drive];
if(pDrive->uptr == NULL) {
return 0xFF;
}
if(pDrive->track != i8272_info->cmd[2]) {
i8272_info->fdc_seek_end = 1;
} else {
i8272_info->fdc_seek_end = 0;
}
i8272_info->fdc_sec_len = i8272_info->cmd[2];
if(i8272_info->fdc_sec_len > I8272_MAX_N) {
sim_debug(ERROR_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Illegal sector size %d [N=%d]. Reset to %d [N=%d].\n",
PCX, 128 << i8272_info->fdc_sec_len,
i8272_info->fdc_sec_len, 128 << I8272_MAX_N, I8272_MAX_N);
i8272_info->fdc_sec_len = I8272_MAX_N;
}
i8272_info->fdc_sc = i8272_info->cmd[3];
i8272_info->fdc_gpl = i8272_info->cmd[4];
i8272_info->fdc_fillbyte = i8272_info->cmd[5];
sim_debug(FMT_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Format Drive: %d, %s, C=%d. H=%d. N=%d, SC=%d, GPL=%02x, FILL=%02x\n",
PCX,
i8272_info->sel_drive,
i8272_info->fdc_mfm ? "MFM" : "FM",
pDrive->track,
i8272_info->fdc_head,
i8272_info->fdc_sec_len,
i8272_info->fdc_sc,
i8272_info->fdc_gpl,
i8272_info->fdc_fillbyte);
i8272_info->fdc_status[0] = (i8272_info->fdc_hds & 1) << 2;
i8272_info->fdc_status[0] |= (i8272_info->sel_drive & 0x03);
i8272_info->fdc_status[1] = 0;
i8272_info->fdc_status[2] = 0;
i8272_info->fdc_sectorcount = 0;
i8272_info->result[0] = i8272_info->fdc_status[0];
i8272_info->result[1] = i8272_info->fdc_status[1];
i8272_info->result[2] = i8272_info->fdc_status[2];
i8272_info->result[3] = pDrive->track;
i8272_info->result[4] = i8272_info->fdc_head; /* AGN for now we cannot format with logicalHead */
i8272_info->result[5] = i8272_info->fdc_sector; /* AGN ditto for logicalCyl */
i8272_info->result[6] = i8272_info->fdc_sec_len;
break;
case I8272_SENSE_INTR_STATUS: /* SENSE INTERRUPT STATUS */
sim_debug(CMD_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Sense Interrupt Status\n", PCX);
i8272_info->result[0] = i8272_info->fdc_seek_end ? 0x20 : 0x00; /* SEEK_END */
i8272_info->result[0] |= i8272_info->sel_drive;
i8272_info->result[1] = pDrive->track;
i8272_irq = 0;
break;
case I8272_SPECIFY: /* SPECIFY */
i8272_info->fdc_srt = 16 - ((i8272_info->cmd[1] & 0xF0) >> 4);
i8272_info->fdc_hut = (i8272_info->cmd[1] & 0x0F) * 16;
i8272_info->fdc_hlt = ((i8272_info->cmd[2] & 0xFE) >> 1) * 2;
i8272_info->fdc_nd = (i8272_info->cmd[2] & 0x01);
i8272_info->fdc_phase = CMD_PHASE; /* No result phase */
sim_debug(CMD_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Specify: SRT=%d, HUT=%d, HLT=%d, ND=%s\n",
PCX, i8272_info->fdc_srt,
i8272_info->fdc_hut,
i8272_info->fdc_hlt,
i8272_info->fdc_nd ? "NON-DMA" : "DMA");
break;
case I8272_SENSE_DRIVE_STATUS: /* Setup Status3 Byte */
i8272_info->fdc_hds = (i8272_info->cmd[1] & 0x04) >> 2;
i8272_info->sel_drive = (i8272_info->cmd[1] & 0x03);
pDrive = &i8272_info->drive[i8272_info->sel_drive];
if(pDrive->uptr == NULL) {
return 0xFF;
}
i8272_info->result[0] = (pDrive->ready) ? DRIVE_STATUS_READY : 0; /* Drive Ready */
if(imdGetSides(pDrive->imd) == 2) {
i8272_info->result[0] |= DRIVE_STATUS_TWO_SIDED; /* Two-sided? */
}
if(imdIsWriteLocked(pDrive->imd)) {
i8272_info->result[0] |= DRIVE_STATUS_WP; /* Write Protected? */
}
i8272_info->result[0] |= (i8272_info->fdc_hds & 1) << 2;
i8272_info->result[0] |= (i8272_info->sel_drive & 0x03);
i8272_info->result[0] |= (pDrive->track == 0) ? DRIVE_STATUS_TRACK0 : 0x00; /* Track 0 */
sim_debug(CMD_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Sense Drive Status = 0x%02x\n", PCX, i8272_info->result[0]);
break;
case I8272_SEEK: /* SEEK */
i8272_info->fdc_mt = (i8272_info->cmd[0] & 0x80) >> 7;
i8272_info->fdc_mfm = (i8272_info->cmd[0] & 0x40) >> 6;
i8272_info->fdc_sk = (i8272_info->cmd[0] & 0x20) >> 5;
i8272_info->fdc_hds = (i8272_info->cmd[1] & 0x04) >> 2;
i8272_info->sel_drive = (i8272_info->cmd[1] & 0x03);
pDrive = &i8272_info->drive[i8272_info->sel_drive];
if(pDrive->uptr == NULL) {
return 0xFF;
}
pDrive->track = i8272_info->cmd[2];
i8272_info->fdc_head = i8272_info->fdc_hds; /*AGN seek should save the head */
i8272_info->fdc_seek_end = 1;
sim_debug(SEEK_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Seek Drive: %d, %s %s, C=%d. Skip Deleted Data=%s Head Select=%s\n",
PCX,
i8272_info->sel_drive,
i8272_info->fdc_mt ? "Multi" : "Single",
i8272_info->fdc_mfm ? "MFM" : "FM",
i8272_info->cmd[2],
i8272_info->fdc_sk ? "True" : "False",
i8272_info->fdc_hds ? "True" : "False");
break;
default: /* INVALID */
break;
}
if(i8272_info->fdc_phase == EXEC_PHASE) {
switch(i8272_info->cmd[0] & 0x1F) {
case I8272_READ_TRACK:
printf("I8272: " ADDRESS_FORMAT " Read a track (untested.)" NLP, PCX);
i8272_info->fdc_sector = 1; /* Read entire track from sector 1...eot */
case I8272_READ_DATA:
case I8272_READ_DELETED_DATA:
disk_read = 1;
case I8272_WRITE_DATA:
case I8272_WRITE_DELETED_DATA:
for(;i8272_info->fdc_sector<=i8272_info->fdc_eot;i8272_info->fdc_sector++) {
sim_debug(RD_DATA_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" %s Data, sector: %d sector len=%d\n",
PCX, disk_read ? "RD" : "WR",
i8272_info->fdc_sector,
128 << i8272_info->fdc_sec_len);
if(pDrive->imd == NULL) {
printf(".imd is NULL!" NLP);
}
if(disk_read) { /* Read sector */
sectRead(pDrive->imd,
pDrive->track,
i8272_info->fdc_head,
i8272_info->fdc_sector,
sdata.raw,
128 << i8272_info->fdc_sec_len,
&flags,
&readlen);
for(i=0;i<(128 << i8272_info->fdc_sec_len);i++) {
PutByteDMA(i8272_info->fdc_dma_addr, sdata.raw[i]);
i8272_info->fdc_dma_addr++;
}
sim_debug(RD_DATA_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" T:%d/H:%d/S:%d/L:%4d: Data transferred to RAM at 0x%06x\n",
PCX, pDrive->track,
i8272_info->fdc_head,
i8272_info->fdc_sector,
128 << i8272_info->fdc_sec_len,
i8272_info->fdc_dma_addr - i);
} else { /* Write */
for(i=0;i<(128 << i8272_info->fdc_sec_len);i++) {
sdata.raw[i] = GetByteDMA(i8272_info->fdc_dma_addr);
i8272_info->fdc_dma_addr++;
}
sim_debug(WR_DATA_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Data transferred from RAM at 0x%06x\n",
PCX, i8272_info->fdc_dma_addr);
sectWrite(pDrive->imd,
pDrive->track,
i8272_info->fdc_head,
i8272_info->fdc_sector,
sdata.raw,
128 << i8272_info->fdc_sec_len,
&flags,
&readlen);
}
i8272_info->result[5] = i8272_info->fdc_sector;
i8272_info->result[1] = 0x80;
}
break;
case I8272_FORMAT_TRACK: /* FORMAT A TRACK */
for(i8272_info->fdc_sector = 1;i8272_info->fdc_sector<=i8272_info->fdc_sc;i8272_info->fdc_sector++) {
sim_debug(CMD_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Format Track %d, Sector=%d, len=%d\n", PCX, pDrive->track, i8272_info->fdc_sector, 128 << i8272_info->fdc_sec_len);
if(i8272_info->fdc_sectorcount >= I8272_MAX_SECTOR) {
sim_debug(ERROR_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Illegal sector count\n", PCX);
i8272_info->fdc_sectorcount = 0;
}
i8272_info->fdc_sectormap[i8272_info->fdc_sectorcount] = i8272_info->fdc_sector;
i8272_info->fdc_sectorcount++;
if(i8272_info->fdc_sectorcount == i8272_info->fdc_sc) {
trackWrite(pDrive->imd,
pDrive->track,
i8272_info->fdc_head,
i8272_info->fdc_sc,
128 << i8272_info->fdc_sec_len,
i8272_info->fdc_sectormap,
i8272_info->fdc_mfm ? 3 : 0,
i8272_info->fdc_fillbyte,
&flags);
/* Recalculate disk size */
pDrive->uptr->capac = sim_fsize(pDrive->uptr->fileref);
}
}
break;
case I8272_SCAN_LOW_EQUAL: /* SCAN LOW OR EQUAL */
case I8272_SCAN_HIGH_EQUAL: /* SCAN HIGH OR EQUAL */
case I8272_SCAN_EQUAL: /* SCAN EQUAL */
sim_debug(CMD_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" Scan Data\n", PCX);
sim_debug(ERROR_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" ERROR: Scan not implemented.\n", PCX);
break;
case I8272_READ_ID: /* READ ID */
sim_debug(CMD_MSG, &i8272_dev, "I8272: " ADDRESS_FORMAT
" READ ID Drive %d result ST0=%02x ST1=%02x ST2=%02x "
"C=%d H=%d R=%02x N=%d\n", PCX,
i8272_info->sel_drive,
i8272_info->result[0], i8272_info->result[1],
i8272_info->result[2], i8272_info->result[3],
i8272_info->result[4], i8272_info->result[5],
i8272_info->result[6]);
break;
default:
break;
}
}
if(i8272_info->result_len != 0) {
i8272_info->fdc_phase ++;
} else {
i8272_info->fdc_phase = CMD_PHASE;
}
i8272_info->result_index = 0;
if((i8272_info->cmd[0] & 0x1F) != I8272_SENSE_INTR_STATUS) {
raise_i8272_interrupt();
}
}
break;
}
cData = 0x00;
return (cData);
}
/* Attach routine */
t_stat i8272_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 I8272%d\n", i));
i8272_info->drive[i].uptr = uptr;
/* Default to drive not ready */
i8272_info->drive[i].ready = 0;
if(uptr->capac > 0) {
char *rtn = fgets(header, 4, uptr->fileref);
if((rtn != NULL) && strncmp(header, "IMD", 3)) {
printf("I8272: Only IMD disk images are supported\n");
i8272_info->drive[i].uptr = NULL;
return SCPE_OPENERR;
}
} else {
/* create a disk image file in IMD format. */
if (diskCreate(uptr->fileref, "$Id: i8272.c 1999 2008-07-22 04:25:28Z hharte $") != SCPE_OK) {
printf("I8272: Failed to create IMD disk.\n");
i8272_info->drive[i].uptr = NULL;
return SCPE_OPENERR;
}
uptr->capac = sim_fsize(uptr->fileref);
}
uptr->u3 = IMAGE_TYPE_IMD;
if (uptr->flags & UNIT_I8272_VERBOSE) {
printf("I8272%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_I8272_VERBOSE)
printf("--------------------------------------------------------\n");
i8272_info->drive[i].imd = diskOpen(uptr->fileref, uptr->flags & UNIT_I8272_VERBOSE);
if (uptr->flags & UNIT_I8272_VERBOSE)
printf("\n");
if (i8272_info->drive[i].imd == NULL) {
printf("I8272: IMD disk corrupt.\n");
i8272_info->drive[i].uptr = NULL;
return SCPE_OPENERR;
}
i8272_info->drive[i].ready = 1;
} else {
i8272_info->drive[i].imd = NULL;
}
return SCPE_OK;
}
/* Attach routine */
static t_stat vfdhd_attach(UNIT *uptr, char *cptr)
{
char header[4];
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) {
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;
vfdhd_detach(uptr);
return SCPE_OPENERR;
} else {
uptr->u3 = IMAGE_TYPE_DSK;
}
} else {
/* creating file, must be DSK format. */
uptr->u3 = IMAGE_TYPE_DSK;
}
if (uptr->flags & UNIT_VFDHD_VERBOSE)
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) {
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)
printf("--------------------------------------------------------\n");
vfdhd_info->drive[i].imd = diskOpen((uptr->fileref), (uptr->flags & UNIT_VFDHD_VERBOSE));
if (uptr->flags & UNIT_VFDHD_VERBOSE)
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;
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;
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;
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;
}
/*
* Create an ImageDisk (IMD) file. This function just creates the comment header, and allows
* the user to enter a comment. After the IMD is created, it must be formatted with a format
* program on the simulated operating system, ie CP/M, CDOS, 86-DOS.
*
* If the IMD file already exists, the user will be given the option of overwriting it.
*/
t_stat diskCreate(FILE *fileref, const char *ctlr_comment)
{
DISK_INFO *myDisk = NULL;
char *comment;
char *curptr;
char *result;
uint8 answer;
int32 len, remaining;
if(fileref == NULL) {
return (SCPE_OPENERR);
}
if(sim_fsize(fileref) != 0) {
sim_printf("SIM_IMD: Disk image already has data, do you want to overwrite it? ");
answer = getchar();
if((answer != 'y') && (answer != 'Y')) {
return (SCPE_OPENERR);
}
}
if((curptr = comment = (char *)calloc(1, MAX_COMMENT_LEN)) == 0) {
sim_printf("Memory allocation failure.\n");
return (SCPE_MEM);
}
sim_printf("SIM_IMD: Enter a comment for this disk.\n"
"SIM_IMD: Terminate with a '.' on an otherwise blank line.\n");
remaining = MAX_COMMENT_LEN;
do {
sim_printf("IMD> ");
result = fgets(curptr, remaining - 3, stdin);
if ((result == NULL) || (strcmp(curptr, ".\n") == 0)) {
remaining = 0;
} else {
len = strlen(curptr) - 1;
if (curptr[len] != '\n')
len++;
remaining -= len;
curptr += len;
*curptr++ = 0x0d;
*curptr++ = 0x0a;
}
} while (remaining > 4);
*curptr = 0x00;
/* rewind to the beginning of the file. */
rewind(fileref);
/* Erase the contents of the IMD file in case we are overwriting an existing image. */
if (sim_set_fsize(fileref, (t_addr)ftell (fileref)) == -1) {
sim_printf("SIM_IMD: Error overwriting disk image.\n");
return(SCPE_OPENERR);
}
fprintf(fileref, "IMD SIMH %s %s\n", __DATE__, __TIME__);
fputs(comment, fileref);
free(comment);
fprintf(fileref, "\n\n$Id: sim_imd.c 1999 2008-07-22 04:25:28Z hharte $\n");
fprintf(fileref, "%s\n", ctlr_comment);
fputc(0x1A, fileref); /* EOF marker for IMD comment. */
fflush(fileref);
if((myDisk = diskOpen(fileref, 0)) == NULL) {
sim_printf("SIM_IMD: Error opening disk for format.\n");
return(SCPE_OPENERR);
}
if(diskFormat(myDisk) != SCPE_OK) {
sim_printf("SIM_IMD: error formatting disk.\n");
}
return diskClose(&myDisk);
}
/* Attach routine */
static t_stat hdsk_attach(UNIT *uptr, char *cptr) {
t_stat r;
uint32 i;
char unitChar;
r = attach_unit(uptr, cptr); /* attach unit */
if ( r != SCPE_OK) /* error? */
return r;
/* Step 1: Determine capacity of this disk */
uptr -> capac = sim_fsize(uptr -> fileref); /* the file length is a good candidate */
if (uptr -> capac == 0) { /* file does not exist or has length 0 */
uptr -> capac = uptr -> HDSK_NUMBER_OF_TRACKS *
uptr -> HDSK_SECTORS_PER_TRACK * uptr -> HDSK_SECTOR_SIZE;
if (uptr -> capac == 0)
uptr -> capac = HDSK_CAPACITY;
} /* post condition: uptr -> capac > 0 */
assert(uptr -> capac);
/* Step 2: Determine format based on disk capacity */
uptr -> HDSK_FORMAT_TYPE = -1; /* default to unknown format type */
for (i = 0; dpb[i].capac != 0; i++) { /* find disk parameter block */
if (dpb[i].capac == uptr -> capac) { /* found if correct capacity */
uptr -> HDSK_FORMAT_TYPE = i;
break;
}
}
/* Step 3: Set number of sectors per track and sector size */
if (uptr -> HDSK_FORMAT_TYPE == -1) { /* Case 1: no disk parameter block found*/
for (i = 0; i < hdsk_dev.numunits; i++) /* find affected unit number */
if (&hdsk_unit[i] == uptr)
break; /* found */
unitChar = '0' + i;
uptr -> HDSK_FORMAT_TYPE = 0;
printf("HDSK%c: WARNING: Unsupported disk capacity, assuming HDSK type with capacity %iKB.\n",
unitChar, uptr -> capac / 1000);
uptr -> flags |= UNIT_HDSK_WLK;
printf("HDSK%c: WARNING: Forcing WRTLCK.\n", unitChar);
/* check whether capacity corresponds to setting of tracks, sectors per track and sector size */
if (uptr -> capac != (uint32)(uptr -> HDSK_NUMBER_OF_TRACKS *
uptr -> HDSK_SECTORS_PER_TRACK * uptr -> HDSK_SECTOR_SIZE)) {
printf("HDSK%c: WARNING: Fixing geometry.\n", unitChar);
if (uptr -> HDSK_SECTORS_PER_TRACK == 0)
uptr -> HDSK_SECTORS_PER_TRACK = 32;
if (uptr -> HDSK_SECTOR_SIZE == 0)
uptr -> HDSK_SECTOR_SIZE = 128;
}
}
else { /* Case 2: disk parameter block found */
uptr -> HDSK_SECTORS_PER_TRACK = dpb[uptr -> HDSK_FORMAT_TYPE].spt >> dpb[uptr -> HDSK_FORMAT_TYPE].psh;
uptr -> HDSK_SECTOR_SIZE = (128 << dpb[uptr -> HDSK_FORMAT_TYPE].psh);
}
assert(uptr -> HDSK_SECTORS_PER_TRACK && uptr -> HDSK_SECTOR_SIZE);
/* Step 4: Number of tracks is smallest number to accomodate capacity */
uptr -> HDSK_NUMBER_OF_TRACKS = (uptr -> capac + uptr -> HDSK_SECTORS_PER_TRACK *
uptr -> HDSK_SECTOR_SIZE - 1) / (uptr -> HDSK_SECTORS_PER_TRACK * uptr -> HDSK_SECTOR_SIZE);
assert( ( (t_addr) ((uptr -> HDSK_NUMBER_OF_TRACKS - 1) * uptr -> HDSK_SECTORS_PER_TRACK *
uptr -> HDSK_SECTOR_SIZE) < uptr -> capac) &&
(uptr -> capac <= (t_addr) (uptr -> HDSK_NUMBER_OF_TRACKS *
uptr -> HDSK_SECTORS_PER_TRACK * uptr -> HDSK_SECTOR_SIZE) ) );
return SCPE_OK;
}
/* Attach routine */
static t_stat hdsk_attach(UNIT *uptr, char *cptr) {
int32 thisUnitIndex;
char unitChar;
const t_stat r = attach_unit(uptr, cptr); /* attach unit */
if (r != SCPE_OK) /* error? */
return r;
assert(uptr != NULL);
thisUnitIndex = find_unit_index(uptr);
unitChar = '0' + thisUnitIndex;
assert((0 <= thisUnitIndex) && (thisUnitIndex < HDSK_NUMBER));
if (is_imd(uptr)) {
if ((sim_fsize(uptr -> fileref) == 0) &&
(diskCreate(uptr -> fileref, "$Id: SIMH hdsk.c $") != SCPE_OK)) {
printf("HDSK%c (IMD): Failed to create IMD disk.\n", unitChar);
detach_unit(uptr);
return SCPE_OPENERR;
}
hdsk_imd[thisUnitIndex] = diskOpen(uptr -> fileref, sim_deb && (hdsk_dev.dctrl & VERBOSE_MSG));
if (hdsk_imd[thisUnitIndex] == NULL)
return SCPE_IOERR;
verifyDiskInfo(*hdsk_imd[thisUnitIndex], '0' + thisUnitIndex);
uptr -> HDSK_NUMBER_OF_TRACKS = hdsk_imd[thisUnitIndex] -> ntracks;
uptr -> HDSK_SECTORS_PER_TRACK = hdsk_imd[thisUnitIndex] -> track[1][0].nsects;
uptr -> HDSK_SECTOR_SIZE = hdsk_imd[thisUnitIndex] -> track[1][0].sectsize;
uptr -> capac = ((uptr -> HDSK_NUMBER_OF_TRACKS) *
(uptr -> HDSK_SECTORS_PER_TRACK) *
(uptr -> HDSK_SECTOR_SIZE));
assignFormat(uptr);
if (uptr -> HDSK_FORMAT_TYPE == -1) { /* Case 1: no disk parameter block found*/
uptr -> HDSK_FORMAT_TYPE = 0;
printf("HDSK%c (IMD): WARNING: Unsupported disk capacity, assuming HDSK type "
"with capacity %iKB.\n", unitChar, uptr -> capac / 1000);
uptr -> flags |= UNIT_HDSK_WLK;
printf("HDSK%c (IMD): WARNING: Forcing WRTLCK.\n", unitChar);
}
return SCPE_OK;
}
/* Step 1: Determine capacity of this disk */
uptr -> capac = sim_fsize(uptr -> fileref); /* the file length is a good indication */
if (uptr -> capac == 0) { /* file does not exist or has length 0 */
uptr -> capac = (uptr -> HDSK_NUMBER_OF_TRACKS *
uptr -> HDSK_SECTORS_PER_TRACK * uptr -> HDSK_SECTOR_SIZE);
if (uptr -> capac == 0)
uptr -> capac = HDSK_CAPACITY;
} /* post condition: uptr -> capac > 0 */
assert(uptr -> capac);
/* Step 2: Determine format based on disk capacity */
assignFormat(uptr);
/* Step 3: Set number of sectors per track and sector size */
if (uptr -> HDSK_FORMAT_TYPE == -1) { /* Case 1: no disk parameter block found */
uptr -> HDSK_FORMAT_TYPE = 0;
printf("HDSK%c: WARNING: Unsupported disk capacity, assuming HDSK type with capacity %iKB.\n",
unitChar, uptr -> capac / 1000);
uptr -> flags |= UNIT_HDSK_WLK;
printf("HDSK%c: WARNING: Forcing WRTLCK.\n", unitChar);
/* check whether capacity corresponds to setting of tracks, sectors per track and sector size */
if (uptr -> capac != (uint32)(uptr -> HDSK_NUMBER_OF_TRACKS *
uptr -> HDSK_SECTORS_PER_TRACK * uptr -> HDSK_SECTOR_SIZE)) {
printf("HDSK%c: WARNING: Fixing geometry.\n", unitChar);
if (uptr -> HDSK_SECTORS_PER_TRACK == 0)
uptr -> HDSK_SECTORS_PER_TRACK = 32;
if (uptr -> HDSK_SECTOR_SIZE == 0)
uptr -> HDSK_SECTOR_SIZE = 128;
}
}
else { /* Case 2: disk parameter block found */
uptr -> HDSK_SECTORS_PER_TRACK = dpb[uptr -> HDSK_FORMAT_TYPE].spt >> dpb[uptr -> HDSK_FORMAT_TYPE].psh;
uptr -> HDSK_SECTOR_SIZE = (128 << dpb[uptr -> HDSK_FORMAT_TYPE].psh);
}
assert((uptr -> HDSK_SECTORS_PER_TRACK) && (uptr -> HDSK_SECTOR_SIZE) && (uptr -> HDSK_FORMAT_TYPE >= 0));
/* Step 4: Number of tracks is smallest number to accomodate capacity */
uptr -> HDSK_NUMBER_OF_TRACKS = (uptr -> capac + uptr -> HDSK_SECTORS_PER_TRACK *
uptr -> HDSK_SECTOR_SIZE - 1) / (uptr -> HDSK_SECTORS_PER_TRACK * uptr -> HDSK_SECTOR_SIZE);
assert( ( (t_addr) ((uptr -> HDSK_NUMBER_OF_TRACKS - 1) * uptr -> HDSK_SECTORS_PER_TRACK *
uptr -> HDSK_SECTOR_SIZE) < uptr -> capac) &&
(uptr -> capac <= (t_addr) (uptr -> HDSK_NUMBER_OF_TRACKS *
uptr -> HDSK_SECTORS_PER_TRACK * uptr -> HDSK_SECTOR_SIZE) ) );
return SCPE_OK;
}
/* 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)) {
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) {
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)
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)
printf("--------------------------------------------------------\n");
wd179x_info->drive[i].imd = diskOpen(uptr->fileref, uptr->flags & UNIT_WD179X_VERBOSE);
if (uptr->flags & UNIT_WD179X_VERBOSE)
printf("\n");
if (wd179x_info->drive[i].imd == NULL) {
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;
}
t_stat sim_tape_wrgap (UNIT *uptr, uint32 gaplen, uint32 bpi)
{
t_stat st;
t_mtrlnt meta, sbc, new_len, rec_size;
t_addr gap_pos = uptr->pos;
uint32 file_size, marker_count;
uint32 format = MT_GET_FMT (uptr);
uint32 gap_alloc = 0; /* gap allocated from tape */
int32 gap_needed = (gaplen * bpi) / 10; /* gap remainder still needed */
const uint32 meta_size = sizeof (t_mtrlnt); /* bytes per metadatum */
const uint32 min_rec_size = 2 + sizeof (t_mtrlnt) * 2; /* smallest data record size */
MT_CLR_PNU (uptr);
if ((uptr->flags & UNIT_ATT) == 0) /* not attached? */
return MTSE_UNATT;
if (format != MTUF_F_STD) /* not SIMH fmt? */
return MTSE_FMT;
if (sim_tape_wrp (uptr)) /* write protected? */
return MTSE_WRP;
file_size = sim_fsize (uptr->fileref); /* get file size */
sim_fseek (uptr->fileref, uptr->pos, SEEK_SET); /* position tape */
/* Read tape records and allocate to gap until amount required is consumed.
Read next metadatum from tape:
- EOF or EOM: allocate remainder of bytes needed.
- TMK or GAP: allocate sizeof(metadatum) bytes.
- Reverse GAP: allocate sizeof(metadatum) / 2 bytes.
- Data record: see below.
Loop until bytes needed = 0.
*/
do {
sim_fread (&meta, meta_size, 1, uptr->fileref); /* read metadatum */
if (ferror (uptr->fileref)) { /* read error? */
uptr->pos = gap_pos; /* restore original position */
MT_SET_PNU (uptr); /* position not updated */
return sim_tape_ioerr (uptr); /* translate error */
}
else
uptr->pos = uptr->pos + meta_size; /* move tape over datum */
if (feof (uptr->fileref) || (meta == MTR_EOM)) { /* at eof or eom? */
gap_alloc = gap_alloc + gap_needed; /* allocate remainder */
gap_needed = 0;
}
else if ((meta == MTR_GAP) || (meta == MTR_TMK)) { /* gap or tape mark? */
gap_alloc = gap_alloc + meta_size; /* allocate marker space */
gap_needed = gap_needed - meta_size; /* reduce requirement */
}
else if (meta == MTR_FHGAP) { /* half gap? */
uptr->pos = uptr->pos - meta_size / 2; /* backup to resync */
sim_fseek (uptr->fileref, uptr->pos, SEEK_SET); /* position tape */
gap_alloc = gap_alloc + meta_size / 2; /* allocate marker space */
gap_needed = gap_needed - meta_size / 2; /* reduce requirement */
}
else if (uptr->pos +
MTR_L (meta) + meta_size > file_size) { /* rec len out of range? */
gap_alloc = gap_alloc + gap_needed; /* presume overwritten tape */
gap_needed = 0; /* allocate remainder */
}
/* Allocate a data record:
- Determine record size in bytes (including metadata)
- If record size - bytes needed < smallest allowed record size,
allocate entire record to gap, else allocate needed amount and
truncate data record to reflect remainder.
*/
else { /* data record */
sbc = MTR_L (meta); /* get record data length */
rec_size = ((sbc + 1) & ~1) + meta_size * 2; /* overall size in bytes */
if (rec_size < gap_needed + min_rec_size) { /* rec too small? */
uptr->pos = uptr->pos - meta_size + rec_size; /* position past record */
sim_fseek (uptr->fileref, uptr->pos, SEEK_SET); /* move tape */
gap_alloc = gap_alloc + rec_size; /* allocate record */
gap_needed = gap_needed - rec_size; /* reduce requirement */
}
else { /* record size OK */
uptr->pos = uptr->pos - meta_size + gap_needed; /* position to end of gap */
new_len = MTR_F (meta) | (sbc - gap_needed); /* truncate to new len */
st = sim_tape_wrdata (uptr, new_len); /* write new rec len */
if (st != MTSE_OK) { /* write OK? */
uptr->pos = gap_pos; /* restore orig pos */
return st; /* PNU was set by wrdata */
}
uptr->pos = uptr->pos + sbc - gap_needed; /* position to end of data */
st = sim_tape_wrdata (uptr, new_len); /* write new rec len */
if (st != MTSE_OK) { /* write OK? */
uptr->pos = gap_pos; /* restore orig pos */
return st; /* PNU was set by wrdata */
}
gap_alloc = gap_alloc + gap_needed; /* allocate remainder */
gap_needed = 0;
}
}
}
while (gap_needed > 0);
uptr->pos = gap_pos; /* reposition to gap start */
if (gap_alloc & (meta_size - 1)) { /* gap size "odd?" */
st = sim_tape_wrdata (uptr, MTR_FHGAP); /* write half gap marker */
if (st != MTSE_OK) { /* write OK? */
uptr->pos = gap_pos; /* restore orig pos */
return st; /* PNU was set by wrdata */
}
uptr->pos = uptr->pos - meta_size / 2; /* realign position */
gap_alloc = gap_alloc - 2; /* decrease gap to write */
}
marker_count = gap_alloc / meta_size; /* count of gap markers */
do {
st = sim_tape_wrdata (uptr, MTR_GAP); /* write gap markers */
if (st != MTSE_OK) { /* write OK? */
uptr->pos = gap_pos; /* restore orig pos */
return st; /* PNU was set by wrdata */
}
}
while (--marker_count > 0);
return MTSE_OK;
}