Poul-Henning Kamp wrote:
In message <72c46d68028c463ebdb775ee14fb9...@laptop>, "Roy Phillips" writes:
Tim
I have recently acquired a 5370B and find your comments of interest. So in
addition, what was the intention of designing the mother-board to have no
less than three additional (and in my case,unused) pcb slots following the
uP and Display interface, marked ROM, MEM(optional) and SERVICE(AID)
The backplane is the same as in the 5370A.
The SERVICE AID is mentioned in the manual, amongst other things it has
two D/A converters so you can watch the address bus on a X/Y scope.
The optional MEM I have not found any references to, but the 5370A might
have its ram there.
According to the manual, the 5370A has its ram on a separate card. I
think these units use a bit of power - this might explain the heat. I'm
none to sure as to how useful the service aid would be. I remember a
project in a mag about these back in the '80s and suspect that like the
signature analyser, they were experiments in digital circuit
troubleshooting. I haven't seen the technique used extensively. ( at
all ). It is a bit like a real time software profiler - I have seen it
used but the usefulness was not too great.
Tim
p.s. Did my original post make the newsgroup, or just one person?
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