HP2000/Access - (hpemu clarification)

From: Jay West <jwest_at_classiccmp.org>
Date: Fri Jan 30 22:55:22 2004

Mike wrote...
> Here's a quick chain test for doing 255 (+-) chains with timing for my
> SIMH configuration as described (about 23 sec.) I would hope that real
> would out perform it. If not I'll have to think about what could be wrong
> the simulator and come up with another test. Let me know what you get,
Jay, next
> time you have her up.

I should have some time to run the chain test sometime this weekend, doesn't
appear to be much planned on the honey-do list. I'll let you know how that
test runs.

In the future if you want me to run anything to compare against the real
hardware, just let me know. I would think an emulator would run circles
around the real hardware though, at least hardware of the 2100 vintage. One
suggestion. I think you mentioned some sluggishness in the login procedure
under SIMH, and you also mentioned the SIMH approach was tieing the two cpus
together with sockets. I was using sockets for part of HPEMU, and found them
to be dismally slow, at least comparatively for the transfer speeds I
needed. I reworked that part with shared memory and the speed problem in
that section is now thoroughly gone :) Just a thought anyways.


Jay West
Received on Fri Jan 30 2004 - 22:55:22 GMT

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