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nscsi_cd: make sgi cdrom identify as hard disk

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(nw) Personal Iris depends on the drive reporting as a non-removable hard disk in response to INQUIRY.
This commit is contained in:
Patrick Mackinlay 2019-07-18 11:16:02 +07:00
parent 8039ba8226
commit 2e25d99be6
2 changed files with 26 additions and 6 deletions
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27
src/devices/bus/nscsi/cd.cpp
View File

@ -64,6 +64,8 @@ nscsi_cdrom_apple_device::nscsi_cdrom_apple_device(const machine_config &mconfig
nscsi_cdrom_device::nscsi_cdrom_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
: nscsi_full_device(mconfig, type, tag, owner, clock)
, cdrom(nullptr)
, periph_qt(0x05)
, removable(true)
, bytes_per_block(bytes_per_sector)
, lba(0)
, cur_sector(0)
@ -223,8 +225,8 @@ void nscsi_cdrom_device::scsi_command()
if (lun != 0)
scsi_cmdbuf[0] = 0x7f;
else
scsi_cmdbuf[0] = 0x05; // device is present, device is CD/DVD (MMC-3)
scsi_cmdbuf[1] = 0x80; // media is removable
scsi_cmdbuf[0] = periph_qt;
scsi_cmdbuf[1] = removable ? 0x80 : 0;
scsi_cmdbuf[2] = compliance; // device complies with SPC-3 standard
scsi_cmdbuf[3] = 0x02; // response data format = SPC-3 standard
scsi_cmdbuf[4] = 0x20; // additional length
@ -264,7 +266,7 @@ void nscsi_cdrom_device::scsi_command()
break;
case SC_RECIEVE_DIAG_RES: {
LOG("command RECIEVE DIAGNOSTICS RESULTS");
LOG("command RECEIVE DIAGNOSTICS RESULTS\n");
int size = (scsi_cmdbuf[3] << 8) | scsi_cmdbuf[4];
int pos = 0;
scsi_cmdbuf[pos++] = 0;
@ -282,7 +284,7 @@ void nscsi_cdrom_device::scsi_command()
}
case SC_SEND_DIAGNOSTICS: {
LOG("command SEND DIAGNOSTICS");
LOG("command SEND DIAGNOSTICS\n");
int size = (scsi_cmdbuf[3] << 8) | scsi_cmdbuf[4];
if(scsi_cmdbuf[1] & 4) {
// Self-test
@ -605,12 +607,25 @@ enum sgi_scsi_command_e : uint8_t {
SGI_HD2CDROM = 0xc9,
};
void nscsi_cdrom_sgi_device::device_reset()
{
nscsi_cdrom_device::device_reset();
// identify as non-removable hard disk after reset
periph_qt = 0x00;
removable = false;
}
void nscsi_cdrom_sgi_device::scsi_command()
{
switch (scsi_cmdbuf[0]) {
case SGI_HD2CDROM:
LOG("command SGI_HD2CDROM");
// No need to do anything (yet). Just acknowledge the command.
LOG("command SGI_HD2CDROM\n");
// now identify as removable cdrom
periph_qt = 0x05;
removable = true;
scsi_status_complete(SS_GOOD);
break;

5
src/devices/bus/nscsi/cd.h
View File

@ -39,6 +39,9 @@ protected:
cdrom_file *cdrom;
uint8_t periph_qt;
bool removable;
private:
static constexpr uint32_t bytes_per_sector = 2048;
@ -64,6 +67,8 @@ public:
nscsi_cdrom_sgi_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
protected:
virtual void device_reset() override;
virtual void scsi_command() override;
virtual bool scsi_command_done(uint8_t command, uint8_t length) override;
};