29 Sep
2020
29 Sep
'20
1:21 a.m.
From: Pete Turnbull
The SRUNL signal that was mentioned isn't likely
to cause a problem
That was just a guess on my part as to the exact cause. It is definite,
though, that Q22 memory won't work with an LSI-11/2 (M7270); I just tried it.
I didn't touch any of the other boards; just swapped the LSI-11/2 for a
KDF11-A (M8186), everything worked fine; put the LSI-11/2 back, dead again.
I'll try an LSI-11 (M7264) tomorrow, make sure it's the same; it and the
LSI-11/2 are similar enough that it should, but it'd be good to confirm it.
Then back to trying to work out why Mini-Unix is so fragile for me. Has
anyone else ever worked with Mini-Unix, and if so, any tips?
Noel
30 Sep
30 Sep
3:50 a.m.
New subject: Fwd: Choice of Unix for 11/03 and 11/23+ Systems
Noel,
Some more info on my machines...
*The
DLV11-J: http://gunkies.org/wiki/DLV11-J_asynchronous_serial_line_interface
<http://gunkies.org/wiki/DLV11-J_asynchronous_serial_line_interface>is
basically 4 DLV11's rolled into a single dual-width card; that's
definitelyan option for Mini-Unix (which apparently supports up to 4
simultaneoususers). They are program compatible with the DHV11, so the
driver should 'justwork'. The boards are readily available on eBait;
'glitchworks' (of thisparish) sells replacement cables (quite good, I have
several).*
I bought a DLV-11J on eBay so that's a starter for my /03 machine. I've
also bought an MSV11-DE 32kW memory board. Peter Schranz has confirmed a
modification to his RLV12/RL02 emulator to allow it to run on the /03. I'm
all set for Mini-Unix on the /03 then!
Regarding the KDF11-B:
*If yours doesn't have the MMU chip, you're probably SOL; those are very
rare.KEF11-A FPU chips are avilable on eBay for modest amounts. *
Looks like I'm in luck! My /23+ CPU board does have the MMU installed. I
also bought a KEF11-A separately. Glad my wife doesn't know about all these
purchases. ;)
Paul
*Paul Riley*
Mo: +86 186 8227 8332
Email: paul(a)rileyriot.com
On Tue, 29 Sep 2020 at 07:23, Noel Chiappa <jnc(a)mercury.lcs.mit.edu> wrote:
From: Pete
Turnbull
The SRUNL signal that was mentioned isn't
likely to cause a problem
That was just a guess on my part as to the exact cause. It is definite,
though, that Q22 memory won't work with an LSI-11/2 (M7270); I just tried
it.
I didn't touch any of the other boards; just swapped the LSI-11/2 for a
KDF11-A (M8186), everything worked fine; put the LSI-11/2 back, dead again.
I'll try an LSI-11 (M7264) tomorrow, make sure it's the same; it and the
LSI-11/2 are similar enough that it should, but it'd be good to confirm it.
Then back to trying to work out why Mini-Unix is so fragile for me. Has
anyone else ever worked with Mini-Unix, and if so, any tips?
Noel
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