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Description: The trusty old PDP  8.

 

Does anyone have the alignment procedures for the G007 and G008 cards in the Straight 8? 
  The problem we are facing now is getting the memory checker board to run more than a few minutes. It looks like there has been enough drift in components over the years that it needs to have the pots tweaked. We have gotten the memory checkerboard to run in field zero for up to 15 minutes by swaping cards on the bits that fail to the... more »
By dpi  - Nov 6 - 2 new of 2 messages    

Small Computer Handbook 1973 
  Is there any value in "pdp8/e pdp8/m & pdp8/f small computer handbook" of 1973? It's full of pictures about how computers are designed and made but which seem to bear no resemblance to today's products
By Phil O. Sopher  - Nov 6 - 2 new of 2 messages    

8 Restoration progress 
  I don't know if there are people interested or not but I find I have a desire to talk about the progress we are making on getting it going again. This last week we made pretty good progress. By we I mean Warren Stearns, who also is a lover of old dusty computers, and myself. We both used this particular computer in college back in the 1970's. I... more »
By dpi  - Nov 2 - 10 new of 10 messages    

40 year old PDP-8 
  A friend of mine who likes dusty old computers has been helping me get my Straight 8 running again. For the last couple of months it has been one thing after another going wrong. Over the weekend we were running a program we wrote to diagnose a JMS problem that was driving us crazy. Sometimes, it would set the return address to the address... more »
By dpi  - Oct 20 - 3 new of 3 messages    

50Hz vs. 60Hz? 
  Folks, I'd appreciate some thoughts in general, and on some specific cases, on using 50Hz DEC equipment on 60Hz power, since I've started processsing and restoring a large quantity of DEC equipment I've brought over from my UK storage to the USA: 1. Thinking about old DEC logic power supplies in general (pdp-8, -11, -12, -15... more »
By Mike Ross  - Sep 23 - 26 new of 26 messages    

Spare H960 racks anyone? 
  Title says it all... I'm in need of a few (up to 10) H960 racks in decent (rust-free) shape. Anyone who can help, please reply! Failing that I'll need to get out the sandblaster and the spraygun! Mike
By Mike Ross  - Sep 23 - 1 new of 1 message    

VT78 Available MN 
  A VT78 is available for pickup in Minneapolis, MN area. It consists of the VT78, a RX02 floppy drive, and a printer. Shipping may be possible if no offers are received for pick up and if all costs are paid. Email to v...@pdp8online.com will forward to the owner, don't reply to this posting. Its a little far of a drive for me so I'm passing the offer on to... more »
By David Gesswein  - Sep 16 - 1 new of 1 message    

Anyone have the Fabritek 8/I memory expansion? 
  It uses a couple centronics style connectors on the back that go to paddle boards. They seem to be awfully short, I don't see exactly how it was hooked up. Anyway, I know somebody ended up with mine (looked like a basket case, mouse infestation). I found the cables! Lemme know where you are (email directly, not list, krellboy (at)... more »
By krellboy  - Sep 13 - 3 new of 3 messages    

MR8-EC useless? 
  I have a couple MR8-EC, is it safe to assume they are useless & undesirable if you have enough memory? From reading CJL it looks like the code on them is poorly written and it's better to use the system handler. Although they can boot the system, I do have an MI8 also.
By krellboy  - Sep 7 - 2 new of 2 messages    

Anyone have a red/blue industrial 8 front panel they are trying to fix up? Or a blue toggle? 
  I've got an industrial 8E panel with about 30% (mostly red) of the switch toggles broken or missing, the front panel is perfect except for one scratch. It could be used to fix up another industrial 8 if someone had one. Or alternatively I could replace all the red toggles with dark orange, but I think there is a blue broken also, the blue is probably the same... more »
By krellboy  - Sep 4 - 1 new of 1 message    

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