2 Jun
2008
2 Jun
'08
12:29 p.m.
I have a CMD CQD-203/T (same board as the CQD-200, only with the S handle for the BA213)
in my MicroVax 3900. This is a SCSI tape controller.
Is there any way to upgrade/convert this board into the /MT (disk/tape) version of the
board? Is it just a simple EPROM replacement, or something more complicated/impossible?
In it's stock form, can this board work with a CDROM drive at all, or do I need the M
or MT version for that?
Thanks!
-Ian
2 Jun
2 Jun
4:55 p.m.
Ian wrote:
Is there any way to upgrade/convert this board into
the /MT (disk/tape)
version of the board? Is it just a simple EPROM replacement, or something
more complicated/impossible?
AFAICT, the /MT has the same firmware as the /M and /T versions, but a
different address decode PAL. I haven't tried to reverse-engineer
the PAL.
In it's stock form, can this board work with a
CDROM drive at all, or do I
need the M or MT version for that?
The /T definitely won't talk to it. I'm not sure about the /M or /MT.
Eric
9:18 p.m.
Eric Smith wrote:
Ian wrote:
I don't know about the /M, but the /MT definitely can. Just shows up as
a regular disk.
Peace... Sridhar
Is there any way to upgrade/convert this board
into the /MT (disk/tape)
version of the board? Is it just a simple EPROM replacement, or something
more complicated/impossible?
AFAICT, the /MT has the same firmware as the /M and /T versions, but a
different address decode PAL. I haven't tried to reverse-engineer
the PAL.
In it's stock form, can this board work with
a CDROM drive at all, or do I
need the M or MT version for that?
The /T definitely won't talk to it. I'm not sure about the /M or /MT.
8:21 p.m.
Eric Smith wrote:
Sridhar wrote:
I don't remember clearly, but I would wager that it would require
512-byte sectors.
Peace... Sridhar
I don't know about the /M, but the /MT
definitely can. Just shows up as
a regular disk.
The /M should work, then.
Does the CD-ROM have to be jumpered for 512-byte logical sectors? Or
will the SCSI controller handle standard 2048-byte sectors?
5888
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eric＠brouhaha.com -
ian_primus＠yahoo.com -
ploopster＠gmail.com