[sdiy] Here's an odd search I'm on - S-100 bus systems ......

[Scott Gravenhorst]

"John L Marshall" <j.l.marshall at comcast.net> wrote:
>PDP-8 some used Flip Chips, basic logic elements on a plug-in card. If I 
>remember correctly PDP-8 used the Omnibus. PDP-8S was painfully slow. It 
>had a one bit accumulator.

I worked for DEC as a CE for 7 years.  I'm not sure about the one bit
accumulator, that sounds right, but it did have a single bit _serial_ bus,
which is what the 'S' actually represented (although we all said it was for
either 'sh!t' or 'slow')

>PDP-11 used Unibus or Q-Bus.

Except for the LSI-11, PDP-11 systems used the Unibus.  Qbus was for the
LSI-11.

>S-100 bus not well thought out. It has two unidirectional data buses, 
>for example.

>680 probably did not have S-100 bus, the 6800 has different bus signals 
>than the 8080.

>I had the first Imsai 8080 in the Pacific Northwest. A friend has it nw.

>Good luck finding any of this old stuff in working condition.

Before I was married, I had a PDP11/04 system with 3 RK05 drives.  I wrote
a two channel disk server for it that worked with a Radio Shack Color
Computer and a SWTPC 6800, it emulated fast floppy diskettes.  I donated
the DEC stuff to a university.

>Take care,
>John
>
>www.sound-photo.com
>47-30-39.02 N, 122-09-51.75 W, elev 440'
>  ----- Original Message -----=20
>  From: Rykhaard D.A.M.I.A.N.=20
>  To: synth-diy=20
>  Sent: Thursday, December 01, 2005 12:21 AM
>  Subject: [sdiy] Here's an odd search I'm on - S-100 bus systems ......
>
>
>  For the past couple of months, I've remembered seeing the 1975 January =
>issue of Popular Electronics magazine, featuring the 'home computer' =
>origin - the Altair 8800 system.  A panel full of switches with =
>individual LEDs for programming the actual software by, in BITS. :O=20
>
>  Oddly - for the past couple of months - I thought that such a system =
>would be wonderful, built into a modular for controlling my clocks and =
>sequencers, that are coming. ;)
>
>  Now - does ANYone out there know of the availability of any:=20
>
>  Altair 8800 computers
>  Imsai 680 series computers (and THEY are back at http://www.imsai.net =
>:) :) )
>  Digital PDP-8, or PDP-7 computers
>
>  ??  If I recall correctly, they're all S-100 buss systems, that can be =
>configured in a mindbendlingly HUGE # of ways.=20
>  Yes - it's a primitive way of programming, but - the character it =
>would add to my machine.  ;)  The 30 year old desire for such a system =
>has re-emerged. ;)  LOL
>
>  If anyone knows of any S-100 buss modules / parts / computers =
>available, please let me know. :)  The search is on. :D =20
>  D.A.M.I.A.N. (my new modular) will love it!  Haha.  The marriage of =
>electronics and wood.  Ahhhhhhhh. :D ;)=20
>
>  --=20
>  Take care,
>  Warmth and Peace,
>  Ryk
>  http://www.geocities.com/dolphinicus2003/damian.html - old webpage of =
>my new modular synthesizer, D.A.M.I.A.N. :)
>  http://deathlehem.bravehost.com/damian.html - new webpage that I'm =
>moving the old one to ;) (still very new. Much more info to be moved =
>into it.)
>

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-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
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