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Diffstat (limited to 'trunk/src/emu/machine/nscsi_cd.c')
-rw-r--r--trunk/src/emu/machine/nscsi_cd.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/trunk/src/emu/machine/nscsi_cd.c b/trunk/src/emu/machine/nscsi_cd.c
new file mode 100644
index 00000000000..048928555d7
--- /dev/null
+++ b/trunk/src/emu/machine/nscsi_cd.c
@@ -0,0 +1,146 @@
+#include "machine/nscsi_cd.h"
+#include "imagedev/chd_cd.h"
+
+const device_type NSCSI_CDROM = &device_creator<nscsi_cdrom_device>;
+
+nscsi_cdrom_device::nscsi_cdrom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ nscsi_full_device(mconfig, NSCSI_CDROM, "SCSI CDROM", tag, owner, clock)
+{
+}
+
+void nscsi_cdrom_device::device_start()
+{
+ nscsi_full_device::device_start();
+ bytes_per_sector = 2048;
+}
+
+void nscsi_cdrom_device::device_reset()
+{
+ nscsi_full_device::device_reset();
+ cdrom = subdevice<cdrom_image_device>("image")->get_cdrom_file();
+ lba = 0;
+ blocks = 0;
+ cur_lba = -1;
+}
+
+cdrom_interface nscsi_cdrom_device::cd_intf = { 0, 0 };
+
+static MACHINE_CONFIG_FRAGMENT(scsi_cdrom)
+ MCFG_CDROM_ADD("image", nscsi_cdrom_device::cd_intf)
+MACHINE_CONFIG_END
+
+machine_config_constructor nscsi_cdrom_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME(scsi_cdrom);
+}
+
+UINT8 nscsi_cdrom_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(!cdrom_read_data(cdrom, cur_lba, block, CD_TRACK_MODE1)) {
+ logerror("%s: CD READ ERROR !\n", tag());
+ memset(block, 0, sizeof(block));
+ }
+ }
+ return block[pos & (bytes_per_sector - 1)];
+}
+
+void nscsi_cdrom_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: command 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] = 0x05; // device is present, device is CD/DVD (MMC-3)
+ scsi_cmdbuf[1] = 0x80; // media is removable
+ scsi_cmdbuf[2] = 0x05; // device complies with SPC-3 standard
+ scsi_cmdbuf[3] = 0x02; // response data format = SPC-3 standard
+ // some Konami games freak out if this isn't "Sony", so we'll lie
+ // this is the actual drive on my Nagano '98 board
+ strcpy((char *)&scsi_cmdbuf[8], "Sony");
+ strcpy((char *)&scsi_cmdbuf[16], "CDU-76S");
+ strcpy((char *)&scsi_cmdbuf[32], "1.0");
+ if(size > 148)
+ size = 148;
+ scsi_data_in(SBUF_MAIN, 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());
+
+ UINT32 temp = cdrom_get_track_start(cdrom, 0xaa);
+ temp--; // return the last used block on the disc
+
+ 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] = 0;
+ scsi_cmdbuf[5] = 0;
+ scsi_cmdbuf[6] = (bytes_per_sector>>8)&0xff;
+ scsi_cmdbuf[7] = (bytes_per_sector & 0xff);
+
+ scsi_data_in(SBUF_MAIN, 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;
+ }
+}