bluesky6(a)ix.netcom.com (Benedict Chong) wrote :
> There is or was a prentice hall book on logic design that described
> the design of a PDP-8 workalike. I bought the book and told myself
> that one day, I'll build a PDP-8 with EPLDs. Like Allison, I ended up
> with 16 bits and then other things got in the way...
> The book is called top-down logic design or something like that.
The Art of Digital Design, an introduction to top-down design
by Franklin P. Prosser and David E. Winkel
Prentice-Hall 1987 ISBN 0-13-046673-5 025
I have a copy and can highly recommend it. It has a two complete design
descriptions of a PDP-8 CPU, one a state machine implementation the
other a microprogrammed one.
Talking of 16 bit extensions to the PDP-8, that is what the HP-2116A
appears to be, anyone konw that processor?
Regards,
Hans B Pufal
<From: Phil Sutherland <philsuth(a)mycroft.DIALix.oz.au>
<I recently tracked down the articles on the EDUC-8 as the first step
<towards building one. My plan to put it in the corner of my office as an
<"executive toy". However, by the time I get round to it I suspect I'll
<be using it as an educational toy for my (currently 1 year old) son!
On the build it yourself tack I've considered building my own TTL pdp-8 but
every time I put the paper down I end up with 16 bits. The basic 16bit
design was PDP-8 with four more address bits.
Allison
Just a test of the *Broadcast* facility. Trying to put up
a Calendar and Scheduling program on the web site 8-)
--------------------------------------------------
Performed by Auto-Remind : another fine product of
The Software Forge and danjo(a)xnet.com
--------------------------------------------------
>> Presumably if it has a UHF output it also has an internal modulator. Can't you
>> just tap off composite video from the input to that?
>
>It does indeed, and on a separate board, too!
Well, finding a composite video point is trivial, therefore.
>
>Someday I must get a decent TV standard monitor - probably the Barco I
>sold to my brother for use as a telly - but I ought to have a composite
Err... You do not use a Barco monitor as a TV. It's far too nice for that. I
happen to have one, you see.
>one as well (Barco is RGB, of course). At present the monitor I have
Not of course. There were Barco's with built-in PAL, SECAM or NTSC decoders
acording to the user manual for mine. (Barco User manual = 1/2 page explaining
the controls and about 40 pages telling you how to set it up, schematics,
waveforms, test points, etc).
>requires Video + Composite Sync - or it can free-run and generate sync
>for a TV camera.
>
>> What chips _other than the 8048_ are in this device? Is the video side
>> custom or does it use one of the many Philips video chipsets? (Philips Prestel
>> terminals tend to be stuffed with their Teletext IC's, for example...)
>
>I can't remember offhand, except that there are quite a lot of them.
>I'll have another look tonight.
Please e-mail me a list when you get a chance and I'll see what I can find out
about them.
>
>There seem to be two large rectangular metal cans - one with its own PCB
>(probably the UHF modulator) and one on the motherbaord (VHF for US?)
Possible VHF for europe. There are 625 line transmissions on Bands 1 and 3
according to some info I have.
>
>Philip.
-tony
They're extremely rare. Rarer than almost anything except an Apple I.
Just before I was lucky enough to be gifted mine from a saintly
old-timer, I saw one sell for $650. That's the only one I've ever seen
for sale, and the seller said he'd received over 60 inquiries. He also
said he could have gotten more if he wanted to drag the bidding on for
another couple of weeks.
I am aware of a gentleman who may be willing to part with a 5110 + dual
8" external drives + printer, but he wants a "very generous offer" for
it and the shipping alone would be a killer since the total weight is
about 200 lbs (he's in PA).
BTW, do you have a web page for your collection?
Kai
> ----------
> From: Anthony Eros
> Reply To: classiccmp(a)u.washington.edu
> Sent: Wednesday, August 13, 1997 7:32 AM
> To: Discussion re-collecting of classic computers
> Subject: IBM 5100
>
> High up on the list of wants for my collection is an IBM 5100. I
> passed on
> one several years ago at a Goodwill (arrrgh!), but I'd sure like to
> track one
> down now.
>
> Any ideas?
>
> -- Tony Eros
> proprietor -- FooBear's Cluttered Cellar Classic Computer
> Collection
>
Anything that will do downloads with Zmodem, Ymodem or Xmodem
I just need a start. I think the most popular is called BOBTERM
----------
> From: Faiaz, Michael C. HSD <FAIAZMC(a)hsd.utc.com>
> To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
> Subject: RE: Atari 850 Interface
> Date: Wednesday, August 13, 1997 3:27 PM
>
> I may have one. Can you be more specific, as to which term program you
> need?
> Mike
>
> ----------
> From: Bill Girnius
> To: Discussion re-collecting of classic computers
> Subject: Atari 850 Interface
> Date: Wednesday, August 13, 1997 12:16PM
>
>
> Welp! I finally got one. Case got a little damaged in shipping,but it
> looks
> like it will still work. Is there anyone out there that still uses the
> 8bit Atari's that can send me a copy of a Term program on an Atari 8bit
> format disk so I can start downloading stuff to my 8bit atari's?
I may have one. Can you be more specific, as to which term program you
need?
Mike
----------
From: Bill Girnius
To: Discussion re-collecting of classic computers
Subject: Atari 850 Interface
Date: Wednesday, August 13, 1997 12:16PM
Welp! I finally got one. Case got a little damaged in shipping,but it
looks
like it will still work. Is there anyone out there that still uses the
8bit Atari's that can send me a copy of a Term program on an Atari 8bit
format disk so I can start downloading stuff to my 8bit atari's?
> Presumably if it has a UHF output it also has an internal modulator. Can't you
> just tap off composite video from the input to that?
It does indeed, and on a separate board, too!
Someday I must get a decent TV standard monitor - probably the Barco I
sold to my brother for use as a telly - but I ought to have a composite
one as well (Barco is RGB, of course). At present the monitor I have
requires Video + Composite Sync - or it can free-run and generate sync
for a TV camera.
> What chips _other than the 8048_ are in this device? Is the video side
> custom or does it use one of the many Philips video chipsets? (Philips Prestel
> terminals tend to be stuffed with their Teletext IC's, for example...)
I can't remember offhand, except that there are quite a lot of them.
I'll have another look tonight.
There seem to be two large rectangular metal cans - one with its own PCB
(probably the UHF modulator) and one on the motherbaord (VHF for US?)
Philip.
[G7000]
>
>Yes thanks, I have four or five. I don't expect to use the thing until
>I can find out how to get composite video or RGB out, since I don't
>possess a television.
Presumably if it has a UHF output it also has an internal modulator. Can't you
just tap off composite video from the input to that?
What chips _other than the 8048_ are in this device? Is the video side custom
or does it use one of the many Philips video chipsets? (Philips Prestel
terminals tend to be stuffed with their Teletext IC's, for example...)
>
>Philip.
-tony
I met someone who had worked on the Olivetti M20 many years ago and
could possibly still get a hold of some of these.
The M20 is a Z8001 based machine with bitmapped graphics and can run
PCOS (its own OS) or CP/M 8000
Is anyone else interested?
Ben
