building a PDP11 from the things you find at home

From: R. D. Davis <rdd_at_smart.net>
Date: Wed Aug 1 23:10:30 2001

On Sun, 29 Jul 2001, Jerome Fine wrote:
> > >On Thu, 26 Jul 2001, Jerome Fine wrote:
> > > While I probably don't really understand someone who's goal is using the
> > > original hardware, on the other hand, I find that any software development
> > Hmmmm, this IS the classiccmp list isn't it?
>
> Jerome Fine replies:
>
> Thanks for your comment - I had a good laugh. Also with a bit of tongue in
> cheek, a reply ...

Good, I'm glad that it gave you a laugh. :-)

> Yep! It includes those nerds who need to hear the screech of a disk drive
> bearing gone bad (the RD53 whine is about the best) and the broken back
> achieved while lifting an RA81.

Sounds like a rather honorable way to break one's back, what?

> I will admit that on occasion, I do delight in using VERY OLD
> hardware. About 2 years ago, I needed to transfer some data to a
[...]

Ah-hah! Just as I thought. :-)

> Actually, I think both the hardware and software goals that we have are
> crazy, but since we all seem to enjoy ourselves and I know of no law
> that is being broken that will need to be invoked to slowly lower us feet
> first into molten iron, it seems harmless enough.

Well said. What we're doing with computers here basically amounts to
having fun, which is perhaps the healthiest way to use computers!
...despite the risks we take by lifting and moving these toys about.

[...]
> distribution media - not that I would EVER consider the TK50 to be
> a successful backup drive/media - although a TK70 at 256 MBytes
> finally seems acceptable.

If only TK50 and TK70 cartridges were as inexpensive and easily
obtainable as 9-track magtapes.

> Well, when you get to be my age (I just turned 63), you may sing a
> different tune. This weekend, I just finished nursing a very sore
> back into a reasonable

That, I can't dispute; please be careful with lifting.

[...]
> boards which ended up crashing the system again. Took out the last 4 dual
> boards at which point it was OK and started adding them one at a time.
> Viola!!! One board to go - the M7941 and it started crashing again. Out and
> replace with an M9047 - bus grant card - AND it works!!!!!! FINALLY!!!!
 
While I'm not at all keen on the idea of board swapping, I'll still
say congratulations on getting it running again!

--
Copyright (C) 2001 R. D. Davis The difference between humans & other animals: 
All Rights Reserved            an unnatural belief that we're above Nature & 
rdd_at_rddavis.net  410-744-4900  her other creatures, using dogma to justify such
http://www.rddavis.net         beliefs and to justify much human cruelty.
Received on Wed Aug 01 2001 - 23:10:30 BST

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