Subject: Re: Valuable Offer!

From: [email-masked] (Douglas W. Jones,201H MLH,3193350740,3193382879)
Date: 13 Jan 1995 19:19:40 GMT

>From  article <[email-masked]>, by [email-masked] (Charles Lasner):
> In article <[email-masked]> Philip Chien <[email-masked]> writes:

>>Anybody interested in a DEC PDP-8/S????  The first 'personal' (e.g. under
>>$10,000) computer ever made.  Makes a *GREAT* paperweight.  I don't think
>>it has the Pentium bug (tm) though - it could only add and subtract
>>integers - never could handle those division signs!

If you're serious, the machine is a museum piece, and I do have the complete
maintenance manual for it.  Unlike the pentium, it's an open architecture
machine, albeit a bit on the very slow side, even when compared with other
members of the PDP-8 family.

Note, however, that it doesn't subtract.  All arithmetic is done with the
TAD instruction (Two's Complement Add).  There is another instruction with
a microcoded format that includes bits to one's complement and increment
the accumulator -- if both bits are set, it does a two's complement, and
that plus TAD gives you subtraction.

				Doug Jones
				[email-masked]

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From: [email-masked] (Charles Lasner)
Date: Fri, 13 Jan 1995 17:22:35 GMT

In article <[email-masked]> Philip Chien <[email-masked]> writes:
>Philip Chien, Earth News - space writer and consultant  [email-masked]

Are you serious.  We at a.s.p want to know!

cjl

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From: Philip Chien <[email-masked]>
Date: 16 Jan 1995 20:21:06 GMT

>Are you serious.  We at a.s.p want to know!

Actually, considering that I just had to carry the 200 lb. monster 20
miles to my new home, yes I am serious - I've got a DEC PDP-8/S here. 
Makes a great paperweight ...

Philip Chien, Earth News - space writer and consultant  [email-masked]
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