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

[John L Marshall]

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.

PDP-11 used Unibus or Q-Bus.

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.

Take care,
John

www.sound-photo.com
47-30-39.02 N, 122-09-51.75 W, elev 440'
  ----- Original Message ----- 
  From: Rykhaard D.A.M.I.A.N. 
  To: synth-diy 
  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 

  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: 

  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. 
  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  
  D.A.M.I.A.N. (my new modular) will love it!  Haha.  The marriage of electronics and wood.  Ahhhhhhhh. :D ;) 

  -- 
  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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