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by Bill Degnan - 08/29/2010 11:07 |
Repair Workshop at the Wilmington Hackerspace. Matt (foreground) working on a PDP 11/05 to generate I/O using the console, and Alex (rear) working to attach a 3.5 disk drive to a Heathkit H89 computer. Click image for larger picture
Local Tandy expert Fred M. dropped off a huge lot of Tandy III and 4-era systems, drives, software, and docs. Some of these items are for sale. Can you find 9 Tandy computers in this picture? Click image for larger view.
![]() Alex B. and one of his Heathkit H89 computer systems, with external drive. Click image for larger view.
![]() The IBM XT that was used to test disk drives. Today an original IBM 20MB hard drive was saved from the ravages of "stiction". We performed the delicate operation and I think the patient is going to make it.
Matt W. spent a lot of time researching the principles of DEC PDP 11/05 console I/O. This photo is a closeup of the M9970 console card after it had been moved into a more convenient location from the front of the bus. A continuity card was inserted in it's place. Matt determined that the system and interface cable is set for a 110baud/20mAmp teletype. I will post a separate thread with more details. Click image for larger view.
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