static uint8 DISK3_Write(const uint32 Addr, uint8 cData)
{
uint32 next_link;
uint8 result = DISK3_STATUS_COMPLETE;
uint8 i;
uint8 cmd;
DISK3_DRIVE_INFO *pDrive;
for(i = 0; i < DISK3_IOPB_LEN; i++) {
disk3_info->iopb[i] = GetByteDMA(disk3_info->link_addr + i);
}
cmd = disk3_info->iopb[DISK3_IOPB_CMD];
disk3_info->sel_drive = disk3_info->iopb[DISK3_IOPB_DRIVE] & 0x03;
disk3_info->dma_addr = disk3_info->iopb[0x0A];
disk3_info->dma_addr |= disk3_info->iopb[0x0B] << 8;
disk3_info->dma_addr |= disk3_info->iopb[0x0C] << 16;
next_link = disk3_info->iopb[DISK3_IOPB_LINK+0];
next_link |= disk3_info->iopb[DISK3_IOPB_LINK+1] << 8;
next_link |= disk3_info->iopb[DISK3_IOPB_LINK+2] << 16;
sim_debug(VERBOSE_MSG, &disk3_dev, "DISK3[%d]: LINK=0x%05x, NEXT=0x%05x, CMD=%x, %s DMA@0x%05x\n",
disk3_info->sel_drive,
disk3_info->link_addr,
next_link,
disk3_info->iopb[DISK3_IOPB_CMD] & DISK3_CMD_MASK,
(disk3_info->iopb[DISK3_IOPB_CMD] & DISK3_REQUEST_IRQ) ? "IRQ" : "POLL",
disk3_info->dma_addr);
pDrive = &disk3_info->drive[disk3_info->sel_drive];
if(pDrive->ready) {
/* Perform command */
switch(cmd & DISK3_CMD_MASK) {
case DISK3_CODE_NOOP:
sim_debug(VERBOSE_MSG, &disk3_dev, "DISK3[%d]: " ADDRESS_FORMAT
" NOOP\n", disk3_info->sel_drive, PCX);
break;
case DISK3_CODE_VERSION:
break;
case DISK3_CODE_GLOBAL:
sim_debug(CMD_MSG, &disk3_dev, "DISK3[%d]: " ADDRESS_FORMAT
" GLOBAL\n", disk3_info->sel_drive, PCX);
disk3_info->mode = disk3_info->iopb[DISK3_IOPB_ARG1];
disk3_info->retries = disk3_info->iopb[DISK3_IOPB_ARG2];
disk3_info->ndrives = disk3_info->iopb[DISK3_IOPB_ARG3];
sim_debug(SPECIFY_MSG, &disk3_dev, " Mode: 0x%02x\n", disk3_info->mode);
sim_debug(SPECIFY_MSG, &disk3_dev, " # Retries: 0x%02x\n", disk3_info->retries);
sim_debug(SPECIFY_MSG, &disk3_dev, " # Drives: 0x%02x\n", disk3_info->ndrives);
if(disk3_info->mode == DISK3_MODE_ABS) {
sim_debug(ERROR_MSG, &disk3_dev, "DISK3: Absolute addressing not supported.\n");
}
break;
case DISK3_CODE_SPECIFY:
{
uint8 specify_data[22];
sim_debug(CMD_MSG, &disk3_dev, "DISK3[%d]: " ADDRESS_FORMAT
" SPECIFY\n", disk3_info->sel_drive, PCX);
for(i = 0; i < 22; i++) {
specify_data[i] = GetByteDMA(disk3_info->dma_addr + i);
}
pDrive->sectsize = specify_data[4] | (specify_data[5] << 8);
pDrive->nsectors = specify_data[6] | (specify_data[7] << 8);
pDrive->nheads = specify_data[8] | (specify_data[9] << 8);
pDrive->ntracks = specify_data[10] | (specify_data[11] << 8);
pDrive->res_tracks = specify_data[18] | (specify_data[19] << 8);
sim_debug(SPECIFY_MSG, &disk3_dev, " Sectsize: %d\n", pDrive->sectsize);
sim_debug(SPECIFY_MSG, &disk3_dev, " Sectors: %d\n", pDrive->nsectors);
sim_debug(SPECIFY_MSG, &disk3_dev, " Heads: %d\n", pDrive->nheads);
sim_debug(SPECIFY_MSG, &disk3_dev, " Tracks: %d\n", pDrive->ntracks);
sim_debug(SPECIFY_MSG, &disk3_dev, " Reserved: %d\n", pDrive->res_tracks);
break;
}
case DISK3_CODE_HOME:
pDrive->track = 0;
sim_debug(SEEK_MSG, &disk3_dev, "DISK3[%d]: " ADDRESS_FORMAT
" HOME\n", disk3_info->sel_drive, PCX);
break;
case DISK3_CODE_SEEK:
pDrive->track = disk3_info->iopb[DISK3_IOPB_ARG1];
pDrive->track |= (disk3_info->iopb[DISK3_IOPB_ARG2] << 8);
if(pDrive->track > pDrive->ntracks) {
sim_debug(ERROR_MSG, &disk3_dev, "DISK3[%d]: " ADDRESS_FORMAT
" SEEK ERROR %d not found\n", disk3_info->sel_drive, PCX, pDrive->track);
pDrive->track = pDrive->ntracks - 1;
result = DISK3_STATUS_TIMEOUT;
} else {
sim_debug(SEEK_MSG, &disk3_dev, "DISK3[%d]: " ADDRESS_FORMAT
" SEEK %d\n", disk3_info->sel_drive, PCX, pDrive->track);
}
break;
case DISK3_CODE_READ_HDR:
{
sim_debug(CMD_MSG, &disk3_dev, "DISK3[%d]: " ADDRESS_FORMAT
" READ HEADER: %d\n", pDrive->track, PCX, pDrive->track >> 8);
PutByteDMA(disk3_info->dma_addr + 0, pDrive->track & 0xFF);
PutByteDMA(disk3_info->dma_addr + 1, (pDrive->track >> 8) & 0xFF);
PutByteDMA(disk3_info->dma_addr + 2, 0);
PutByteDMA(disk3_info->dma_addr + 3, 1);
break;
}
case DISK3_CODE_READWRITE:
{
uint32 track_len;
uint32 xfr_len;
uint32 file_offset;
uint32 xfr_count = 0;
uint8 *dataBuffer;
size_t rtn;
if(disk3_info->mode == DISK3_MODE_ABS) {
sim_debug(ERROR_MSG, &disk3_dev, "DISK3: Absolute addressing not supported.\n");
break;
}
pDrive->cur_sect = disk3_info->iopb[DISK3_IOPB_ARG2] | (disk3_info->iopb[DISK3_IOPB_ARG3] << 8);
pDrive->cur_track = disk3_info->iopb[DISK3_IOPB_ARG4] | (disk3_info->iopb[DISK3_IOPB_ARG5] << 8);
pDrive->xfr_nsects = disk3_info->iopb[DISK3_IOPB_ARG6] | (disk3_info->iopb[DISK3_IOPB_ARG7] << 8);
track_len = pDrive->nsectors * pDrive->sectsize;
file_offset = (pDrive->cur_track * track_len); /* Calculate offset based on current track */
file_offset += pDrive->cur_sect * pDrive->sectsize;
xfr_len = pDrive->xfr_nsects * pDrive->sectsize;
dataBuffer = malloc(xfr_len);
sim_fseek((pDrive->uptr)->fileref, file_offset, SEEK_SET);
if(disk3_info->iopb[DISK3_IOPB_ARG1] == 1) { /* Read */
rtn = sim_fread(dataBuffer, 1, xfr_len, (pDrive->uptr)->fileref);
sim_debug(RD_DATA_MSG, &disk3_dev, "DISK3[%d]: " ADDRESS_FORMAT
" READ @0x%05x T:%04d/S:%04d/#:%d %s\n",
disk3_info->sel_drive,
PCX,
disk3_info->dma_addr,
pDrive->cur_track,
pDrive->cur_sect,
pDrive->xfr_nsects,
rtn == (size_t)xfr_len ? "OK" : "NOK" );
/* Perform DMA Transfer */
for(xfr_count = 0;xfr_count < xfr_len; xfr_count++) {
PutByteDMA(disk3_info->dma_addr + xfr_count, dataBuffer[xfr_count]);
}
} else { /* Write */
sim_debug(WR_DATA_MSG, &disk3_dev, "DISK3[%d]: " ADDRESS_FORMAT
" WRITE @0x%05x T:%04d/S:%04d/#:%d\n", disk3_info->sel_drive, PCX, disk3_info->dma_addr, pDrive->cur_track, pDrive->cur_sect, pDrive->xfr_nsects );
/* Perform DMA Transfer */
for(xfr_count = 0;xfr_count < xfr_len; xfr_count++) {
dataBuffer[xfr_count] = GetByteDMA(disk3_info->dma_addr + xfr_count);
}
sim_fwrite(dataBuffer, 1, xfr_len, (pDrive->uptr)->fileref);
}
free(dataBuffer);
/* Update Track/Sector in IOPB */
pDrive->cur_sect += pDrive->xfr_nsects;
if(pDrive->cur_sect >= pDrive->nsectors) {
pDrive->cur_sect = pDrive->cur_sect % pDrive->nsectors;
pDrive->cur_track++;
}
disk3_info->iopb[DISK3_IOPB_ARG2] = pDrive->cur_sect & 0xFF;
disk3_info->iopb[DISK3_IOPB_ARG3] = (pDrive->cur_sect >> 8) & 0xFF;
disk3_info->iopb[DISK3_IOPB_ARG4] = pDrive->cur_track & 0xFF;
disk3_info->iopb[DISK3_IOPB_ARG5] = (pDrive->cur_track >> 8) & 0xFF;
disk3_info->iopb[DISK3_IOPB_ARG6] = 0;
disk3_info->iopb[DISK3_IOPB_ARG7] = 0;
/* Update the DATA field in the IOPB */
disk3_info->dma_addr += xfr_len;
disk3_info->iopb[DISK3_IOPB_DATA+0] = disk3_info->dma_addr & 0xFF;
disk3_info->iopb[DISK3_IOPB_DATA+1] = (disk3_info->dma_addr >> 8) & 0xFF;
disk3_info->iopb[DISK3_IOPB_DATA+2] = (disk3_info->dma_addr >> 16) & 0xFF;
break;
}
case DISK3_CODE_FORMAT:
{
uint32 data_len;
uint32 file_offset;
uint8 *fmtBuffer;
data_len = pDrive->nsectors * pDrive->sectsize;
sim_debug(WR_DATA_MSG, &disk3_dev, "DISK3[%d]: " ADDRESS_FORMAT
" FORMAT T:%d/H:%d/Fill=0x%02x/Len=%d\n",
disk3_info->sel_drive,
PCX,
pDrive->track,
disk3_info->iopb[DISK3_IOPB_ARG3],
disk3_info->iopb[DISK3_IOPB_ARG2],
data_len);
file_offset = (pDrive->track * (pDrive->nheads) * data_len); /* Calculate offset based on current track */
file_offset += (disk3_info->iopb[DISK3_IOPB_ARG3] * data_len);
fmtBuffer = malloc(data_len);
memset(fmtBuffer, disk3_info->iopb[DISK3_IOPB_ARG2], data_len);
sim_fseek((pDrive->uptr)->fileref, file_offset, SEEK_SET);
sim_fwrite(fmtBuffer, 1, data_len, (pDrive->uptr)->fileref);
free(fmtBuffer);
break;
}
case DISK3_CODE_SET_MAP:
break;
case DISK3_CODE_RELOCATE:
case DISK3_CODE_FORMAT_BAD:
case DISK3_CODE_STATUS:
case DISK3_CODE_SELECT:
case DISK3_CODE_EXAMINE:
case DISK3_CODE_MODIFY:
default:
sim_debug(ERROR_MSG, &disk3_dev, "DISK3[%d]: " ADDRESS_FORMAT
" CMD=%x Unsupported\n",
disk3_info->sel_drive,
PCX,
cmd & DISK3_CMD_MASK);
break;
}
} else { /* Drive not ready */
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);
}
