--- Joe <rigdonj_at_intellistar.net> wrote:
> Hi,
>
> I just finished scanning all of the computer related pages from my Fall
> 1978 Heathkit catalag and posting them on the web...
Thank you for these. I have been (slowly) restoring an H-11 I recovered
from the crawlspace of a former boss. We did custom DEC work about 12-14
years ago on his H-11 (KDF-11) and my 11/23 (the target system was an 11/73
w/4Mb RAM, Fuji Eagle, the works, running TSX-11 - I loved the fact that I
could develop on a system I paid $300 for and deliver code to a machine that
cost >$10K).
I'm still on the lookout for the schematics for the Heathkit floppy interface.
Mine siezes the bus such that on power-on, I never get an ODT prompt. If I
put a gap in the Qbus, I can run the CPU, see the I/O registers on the floppy
card, etc., but, of course, it doesn't boot up fully - it seems to read in
the boot block, but as soon as RT-11 turns up interrupts, because of the
break in the grant chain, they, of course, never come. I really just need
to know what chips have their fingers in the interrupt handling and to probably
just replace them. My board is socketed and I have checked all the TTL chips
with an IC tester. I'm down to the Heath/DEC bus driver/receiver parts.
Thanks,
-ethan
=====
Even though my old e-mail address is no longer going to
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The original webpage address is still going away. The
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See
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Received on Fri Dec 08 2000 - 11:09:19 GMT