diff options
Diffstat (limited to 'src/emu/machine/nscsi_hd.c')
-rw-r--r-- | src/emu/machine/nscsi_hd.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/src/emu/machine/nscsi_hd.c b/src/emu/machine/nscsi_hd.c new file mode 100644 index 00000000000..61642ed0468 --- /dev/null +++ b/src/emu/machine/nscsi_hd.c @@ -0,0 +1,155 @@ +#include "machine/nscsi_hd.h" +#include "imagedev/harddriv.h" + +const device_type NSCSI_HARDDISK = &device_creator<nscsi_harddisk_device>; + +nscsi_harddisk_device::nscsi_harddisk_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + nscsi_full_device(mconfig, NSCSI_HARDDISK, "SCSI HARDDISK", tag, owner, clock) +{ +} + +void nscsi_harddisk_device::device_start() +{ + nscsi_full_device::device_start(); +} + +void nscsi_harddisk_device::device_reset() +{ + nscsi_full_device::device_reset(); + harddisk_image_device *hd = subdevice<harddisk_image_device>("image"); + harddisk = hd->get_hard_disk_file(); + if(!harddisk) { + scsi_id = -1; + bytes_per_sector = 0; + } else { + const hard_disk_info *hdinfo = hard_disk_get_info(harddisk); + bytes_per_sector = hdinfo->sectorbytes; + } +} + +harddisk_interface nscsi_harddisk_device::hd_intf = { 0, 0 }; + +static MACHINE_CONFIG_FRAGMENT(scsi_harddisk) + MCFG_HARDDISK_CONFIG_ADD("image", nscsi_harddisk_device::hd_intf) +MACHINE_CONFIG_END + +machine_config_constructor nscsi_harddisk_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME(scsi_harddisk); +} + +UINT8 nscsi_harddisk_device::scsi_get_data(int id, int pos) +{ + if(id != 2) + return nscsi_full_device::scsi_get_data(id, pos); + int clba = lba + pos / bytes_per_sector; + if(clba != cur_lba) { + cur_lba = clba; + if(!hard_disk_read(harddisk, cur_lba, block)) { + logerror("%s: HD READ ERROR !\n", tag()); + memset(block, 0, sizeof(block)); + } + } + return block[pos & (bytes_per_sector - 1)]; +} + +void nscsi_harddisk_device::scsi_command() +{ + switch(scsi_cmdbuf[0]) { + case SC_TEST_UNIT_READY: + logerror("%s: command TEST UNIT READY\n", tag()); + scsi_status_complete(SS_GOOD); + break; + + case SC_READ: + lba = ((scsi_cmdbuf[1] & 0x1f)<<16) | (scsi_cmdbuf[2]<<8) | scsi_cmdbuf[3]; + blocks = scsi_cmdbuf[4]; + if(!blocks) + blocks = 256; + + logerror("%s: command READ start=%08x blocks=%04x\n", + tag(), lba, blocks); + + scsi_data_in(2, blocks*bytes_per_sector); + scsi_status_complete(SS_GOOD); + break; + + case SC_INQUIRY: { + int lun = get_lun(scsi_cmdbuf[1] >> 5); + logerror("%s: INQUIRY lun=%d EVPD=%d page=%d alloc=%02x link=%02x\n", + tag(), + lun, scsi_cmdbuf[1] & 1, scsi_cmdbuf[2], scsi_cmdbuf[4], scsi_cmdbuf[5]); + if(lun) { + bad_lun(); + return; + } + + int page = scsi_cmdbuf[2]; + int size = scsi_cmdbuf[4]; + switch(page) { + case 0: + memset(scsi_cmdbuf, 0, 148); + scsi_cmdbuf[0] = 0x00; // device is direct-access (e.g. hard disk) + scsi_cmdbuf[1] = 0x00; // media is not removable + scsi_cmdbuf[2] = 0x05; // device complies with SPC-3 standard + scsi_cmdbuf[3] = 0x02; // response data format = SPC-3 standard + // Apple HD SC setup utility needs to see this + strcpy((char *)&scsi_cmdbuf[8], " SEAGATE"); + strcpy((char *)&scsi_cmdbuf[16], " ST225N"); + strcpy((char *)&scsi_cmdbuf[32], "1.0"); + if(size > 148) + size = 148; + scsi_data_in(0, size); + break; + } + scsi_status_complete(SS_GOOD); + break; + } + + case SC_START_STOP_UNIT: + logerror("%s: command START STOP UNIT\n", tag()); + scsi_status_complete(SS_GOOD); + break; + + case SC_READ_CAPACITY: { + logerror("%s: command READ CAPACITY\n", tag()); + + hard_disk_info *info; + UINT32 temp; + + info = hard_disk_get_info(harddisk); + + // get # of sectors + temp = info->cylinders * info->heads * info->sectors; + temp--; + + scsi_cmdbuf[0] = (temp>>24) & 0xff; + scsi_cmdbuf[1] = (temp>>16) & 0xff; + scsi_cmdbuf[2] = (temp>>8) & 0xff; + scsi_cmdbuf[3] = (temp & 0xff); + scsi_cmdbuf[4] = (info->sectorbytes>>24)&0xff; + scsi_cmdbuf[5] = (info->sectorbytes>>16)&0xff; + scsi_cmdbuf[6] = (info->sectorbytes>>8)&0xff; + scsi_cmdbuf[7] = (info->sectorbytes & 0xff); + + scsi_data_in(0, 8); + scsi_status_complete(SS_GOOD); + break; + } + + case SC_READ_EXTENDED: + lba = (scsi_cmdbuf[2]<<24) | (scsi_cmdbuf[3]<<16) | (scsi_cmdbuf[4]<<8) | scsi_cmdbuf[5]; + blocks = (scsi_cmdbuf[7] << 8) | scsi_cmdbuf[8]; + + logerror("%s: command READ EXTENDED start=%08x blocks=%04x\n", + tag(), lba, blocks); + + scsi_data_in(2, blocks*bytes_per_sector); + scsi_status_complete(SS_GOOD); + break; + + default: + nscsi_full_device::scsi_command(); + break; + } +} |