4 Jun
2012
4 Jun
'12
12:35 p.m.
On Mon, Jun 4, 2012 at 3:19 PM, Holm Tiffe <holm at freibergnet.de> wrote:
There are at least half-a-dozen PALs. It shouldn't take long to
figure out what goes with what - not exact down-to-the-gate-level
reverse engineering, but at least functional grouping would be quick
to do.
...Ahh...The SQ3703 has SBOX Handles?
Yes.
Don't know for now, but it should be possible to
jumper the RQDX3 as 2nd
MSCP Controller to...
It is, but then the boot ROMs can't boot up Standalone Backup for installs.
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.
Right, but to most people, including me, that's a secondary use.
Everybody needs disk interfaces.
Shame it
isn't that easy, but I rather expect it's a ROM and PAL
difference
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. 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
description AGAIN).
I have a few, not hundreds. I have a lot more hex-height handles for
Unibus (and other) cards.
Have a KA630 with memory laying around too, but an
PDP11 is more fun for me
(don't know why).
I enjoy playing on PDP-11s, but the 64K process limit is a bit much
for serious work. I've done _real_ work on VAXen.
If I want VMS I'm booting the VS4000/90...
Right. I only recently got a slower (/60?) VAXstation 4000. Prior to
that, I was struggling to get the SCSI patched ROMs and driver onto a
VAXstation 2000. I never did get that working. I still have a lot of
the VS2000 hardware including the 8-port expansion and an external MFM
drive cable set. Only one ethernet option, sadly. I keep meaning to
test and box up most of my VS2000 hardware and sell off the stuff I
don't need, but other more important things keep me from getting it
all together. Before MicroVAX3100s and VAXstation4000s got cheap and
available, the MicroVAX2000 was the only way to get a small VAX at
home for under $1000. That's been a few years, though. ;-)
-ethan