Ethan Dicks wrote:
On Mon, Jun 4, 2012 at 1:45 AM, Holm Tiffe <holm at
There is a manual for the UC07/08 on the net, it
is one of the first hits
when you try to google.
Right. Found that with no problems, though their own docs describe
the UC07 as a quad-height Unibus card - I'm sure that's just an
ancient cut-and-paste error.
All the settings are in there; that's the important part. I can check
if it's strapped to share the bus with an RQDX3, a common arrangement
(to keep the floppies active). I think that would make the first
drive on this card DUB0: when booting to VMS, but ultimately, except
for typing habits, it doesn't matter what the drive name ends up as.
Don't know for now, but it should be possible to jumper the RQDX3 as 2nd
MSCP Controller to...
Haven't found anything regarding differences
between versions jet....
I would be interested to hear any stories or if anyone happens to have
Release Notes or ECO sheets for different ROM versions. ISTR the
processor on this is an 8031, so it's not impossible to decompile and
diff the different ROM versions, but it's probably not worth the time.
guessing there isn't a lot of info out there to attempt to see if
it's possible to "convert" an SQ3703A to an SQ3706A in the field, but
if anyone knows anything about both boards, I'd be game to try if it's
EPROMs or PALs or whatever.
Found almost nothing for them.
Me either - just 3rd party and eBay sellers (with some listings under $100).
This is, since there seems to be no easy way to convert them to MSCP.
Like you most people don't need an TMSCP SCSI Controller. I'm using them in
conjunction with some Tandberg quarter Inch drives, have install tapes
build with simh for RSX11M, RT11, XXDP ans 2.11 BSD and I'm using this to
transfer data between the simh on my unix pc and the PDP11s.
I have a board LAbeled SQ703 where the 03 is on a
paper label and the SQ7
is printed on the board. Have repaired it sometime, it is working as TMSCP
controller. It has an 10pin Connector for an Terminal to set it up on the
Interface connector side. I remember that I put the rom image from a 706 on
it (shadoo sent me one) but it doesn't work as 706.
Shame it isn't that easy, but I rather expect it's a ROM and PAL
difference, since MSCP and TMSCP controllers use different address
ranges. Any differences in SCSI command sets from tape to disk drives
would be a firmware issues; any differences in bus interaction would
be (mostly?) PAL issues.
I don't looked that cwclose to that board that I could say how the address
decoder is made. It could be an register written by firmware and a
comparator too, this isn't much more hassle as an programmed Pal (but I
remember that I have seen many of them on that board).
I know that there is a 739 that can make both,
MSCP and TMSCP...
Right. Just like the 3703A and 3706A were replaced by the more flexible 3709A.
...Ahh...The SQ3703 has SBOX Handles?
Since I don't _need_ SCSI TMSCP, it reduces my interest in laying
hands on a BA4000-type chassis. I do have that KDJ11 with the S-box
handles, so I'm more likely to mod that than go with an S-box (I have
a stash of real DEC Qbus handles from the place where we made Qbus and
I don't have an BA4000, got an DELQA sometimes from Ebay and removed the
SBOX Handles to put it in a straight 11.
You don't have some of the QBus Hanldes left over? May be you remember that
we build some punched universal Boards lately.. (Arghh, forgot the right
Have a KA630 with memory laying around too, but an PDP11 is more fun for me
(don't know why). iBut I had Quasiarus running on the KA630.
If I want VMS I'm booting the VS4000/90...
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