UINT32 hard_disk_write(struct hard_disk_file *file, UINT32 lbasector, UINT32 numsectors, const void *buffer)
{
UINT32 hunknum = lbasector / file->hunksectors;
UINT32 sectoroffs = lbasector % file->hunksectors;
/* for now, just break down multisector writes into single sectors */
if (numsectors > 1)
{
UINT32 total = 0;
while (numsectors--)
{
if (hard_disk_write(file, lbasector++, 1, (const UINT8 *)buffer + total * file->info.sectorbytes))
total++;
else
break;
}
return total;
}
/* if we haven't cached this hunk, read it now */
if (file->cachehunk != hunknum)
{
if (!chd_read(file->chd, hunknum, 1, file->cache))
return 0;
file->cachehunk = hunknum;
}
/* copy in the requested data */
memcpy(&file->cache[sectoroffs * file->info.sectorbytes], buffer, file->info.sectorbytes);
/* write it back out */
if (chd_write(file->chd, hunknum, 1, file->cache))
return 1;
return 0;
}
//
// Corvus_Write_Sector
//
// Write a variably-sized chunk of data to the CHD file
//
// Pass:
// drv: Corvus drive id (1..15)
// sector: Physical sector number to write to
// buffer: Buffer to write
// len: Length of the buffer (amount of data to write)
//
// Returns:
// status: Command status
//
UINT8 corvus_hdc_t::corvus_write_sector(UINT8 drv, UINT32 sector, UINT8 *buffer, int len) {
hard_disk_file
*disk; // Structures for interface to CHD routines
UINT8 tbuffer[512]; // Buffer to hold an entire sector
UINT16 cylinder; // Cylinder this sector resides on
LOG(("corvus_write_sector: Write Drive: %d, physical sector: 0x%5.5x\n", drv, sector));
disk = corvus_hdc_file(drv);
if(!disk) {
logerror("corvus_write_sector: Failure returned by corvus_hdc_file(%d)\n", drv);
return STAT_FATAL_ERR | STAT_DRIVE_NOT_ONLINE;
}
//
// Calculate what cylinder the sector resides on for timing purposes
//
cylinder = (double) sector / (double) m_sectors_per_track / (double) m_tracks_per_cylinder;
m_delay = abs(m_last_cylinder - cylinder) * TRACK_SEEK_TIME + INTERSECTOR_DELAY;
//
// Corvus supports write sizes of 128, 256 and 512 bytes. In the case of a write smaller than
// the sector size of 512 bytes, the sector is read, the provided data is overlayed and then the
// sector is written back out. See pp. 5 of the Mass Storage Systems GTI for the details of this
// wonderful functionality.
//
if(len == 512) {
hard_disk_write(disk, sector, buffer);
} else {
hard_disk_read(disk, sector, tbuffer); // Read the existing data into our temporary buffer
memcpy(tbuffer, buffer, len); // Overlay the data with the buffer passed
m_delay += INTERSECTOR_DELAY; // Add another delay because of the Read / Write
hard_disk_write(disk, sector, tbuffer); // Re-write the data
}
m_last_cylinder = cylinder;
LOG(("corvus_write_sector: Full sector dump on a write of %d bytes follows:\n", len));
LOG_BUFFER(len == 512 ? buffer : tbuffer, 512);
return STAT_SUCCESS;
}
/*
imghd_write()
Write sector(s) from MAME HD image
*/
imgtoolerr_t imghd_write(struct mess_hard_disk_file *disk, UINT32 lbasector, const void *buffer)
{
chd_interface interface_save;
UINT32 reply;
chd_save_interface(&interface_save);
chd_set_interface(&imgtool_chd_interface);
reply = hard_disk_write(disk->hard_disk, lbasector, buffer);
chd_set_interface(&interface_save);
return reply ? IMGTOOLERR_SUCCESS : map_chd_error(reply);
}
/*
imghd_write()
Write sector(s) from MAME HD image
*/
imgtoolerr_t imghd_write(struct mess_hard_disk_file *disk, UINT32 lbasector, const void *buffer)
{
UINT32 reply;
reply = hard_disk_write(disk->hard_disk, lbasector, buffer);
return (imgtoolerr_t)(reply ? IMGTOOLERR_SUCCESS : map_chd_error((chd_error)reply));
}
void omti5100_device::ExecCommand()
{
int drive = (command[1] >> 5) & 1;
hard_disk_file *image = (drive ? m_image1 : m_image0)->get_hard_disk_file();
if(!image)
{
if(command[0] == T10SPC_CMD_REQUEST_SENSE)
return scsihd_device::ExecCommand();
m_phase = SCSI_PHASE_STATUS;
m_status_code = SCSI_STATUS_CODE_CHECK_CONDITION;
m_sense_asc = OMTI_STATUS_NOT_READY;
m_transfer_length = 0;
return;
}
hard_disk_info *info = hard_disk_get_info(image);
switch(command[0])
{
case OMTI_READ_DATA_BUFFER:
m_phase = SCSI_PHASE_DATAIN;
m_status_code = SCSI_STATUS_CODE_GOOD;
m_transfer_length = 512;
break;
case OMTI_ASSIGN_DISK_PARAM:
m_phase = SCSI_PHASE_DATAOUT;
m_status_code = SCSI_STATUS_CODE_GOOD;
m_transfer_length = 10;
break;
case OMTI_CHECK_TRACK_FORMAT:
m_phase = SCSI_PHASE_STATUS;
m_status_code = SCSI_STATUS_CODE_GOOD;
m_transfer_length = 0;
break;
case T10SBC_CMD_READ_6:
{
int track = ((command[1]&0x1f)<<16 | command[2]<<8 | command[3]) / (m_param[drive].sectors ? m_param[drive].sectors : 1);
int heads = m_param[drive].heads ? m_param[drive].heads : 1;
if(((track % heads) > info->heads) || (track >= (info->cylinders * heads)))
{
m_phase = SCSI_PHASE_STATUS;
m_status_code = SCSI_STATUS_CODE_CHECK_CONDITION;
m_sense_asc = OMTI_STATUS_SEEK_FAIL;
m_transfer_length = 0;
}
else
{
SetDevice(image);
scsihd_device::ExecCommand();
}
break;
}
case OMTI_FORMAT_TRACK:
{
int track = ((command[1]&0x1f)<<16 | command[2]<<8 | command[3]) / m_param[drive].sectors;
if(((track % m_param[drive].heads) <= info->heads) && (track < (info->cylinders * m_param[drive].heads)))
{
dynamic_buffer sector(info->sectorbytes);
memset(§or[0], 0xe5, info->sectorbytes);
m_phase = SCSI_PHASE_STATUS;
m_status_code = SCSI_STATUS_CODE_GOOD;
m_transfer_length = 0;
for(int i = 0; i < info->sectors; i++)
hard_disk_write(image, track * info->sectors + i, §or[0]);
}
else
{
m_phase = SCSI_PHASE_STATUS;
m_status_code = SCSI_STATUS_CODE_CHECK_CONDITION;
m_sense_asc = OMTI_STATUS_SEEK_FAIL;
m_transfer_length = 0;
}
break;
}
default:
SetDevice(image);
scsihd_device::ExecCommand();
break;
}
}
static void write_sector_done(int which)
{
struct ide_state *ide = &idestate[which];
int lba = lba_address(ide), count = 0;
/* now do the write */
if (ide->disk)
count = hard_disk_write(ide->disk, lba, 1, ide->buffer);
/* by default, mark the buffer ready and the seek complete */
ide->status |= IDE_STATUS_BUFFER_READY;
ide->status |= IDE_STATUS_SEEK_COMPLETE;
/* and clear the busy adn error flags */
ide->status &= ~IDE_STATUS_ERROR;
ide->status &= ~IDE_STATUS_BUSY;
/* if we succeeded, advance to the next sector and set the nice bits */
if (count == 1)
{
/* advance the pointers, unless this is the last sector */
/* Gauntlet: Dark Legacy checks to make sure we stop on the last sector */
if (ide->sector_count != 1)
next_sector(ide);
/* clear the error value */
ide->error = IDE_ERROR_NONE;
/* signal an interrupt */
if (--ide->sectors_until_int == 0 || ide->sector_count == 1)
{
ide->sectors_until_int = ((ide->command == IDE_COMMAND_WRITE_MULTIPLE_BLOCK) ? ide->block_count : 1);
signal_interrupt(ide);
}
/* signal an interrupt if there's more data needed */
if (ide->sector_count > 0)
ide->sector_count--;
if (ide->sector_count == 0)
ide->status &= ~IDE_STATUS_BUFFER_READY;
/* keep going for DMA */
if (ide->dma_active && ide->sector_count != 0)
{
read_buffer_from_dma(ide);
continue_write(ide);
}
else
ide->dma_active = 0;
}
/* if we got an error, we need to report it */
else
{
/* set the error flag and the error */
ide->status |= IDE_STATUS_ERROR;
ide->error = IDE_ERROR_BAD_SECTOR;
ide->bus_master_status |= IDE_BUSMASTER_STATUS_ERROR;
ide->bus_master_status &= ~IDE_BUSMASTER_STATUS_ACTIVE;
/* signal an interrupt */
signal_interrupt(ide);
}
}
