On 08/03/2015 09:06 PM, Al Kossow wrote:

do you have anything on the instruction set?

Instruction set? This was not a computer. It was an all hard-wired-logic key to tape system. It could be set to enter data to tape, verify data by retyping it, and it would beep if a record did not match, or allow you to view the tape contents on a panel of lights, one bulb per EBCDIC character. The thing had a core memory buffer to hold one 80-character record, only keeping 6 bits per character.

I ripped out all the key to tape logic, fortunately, it was designed with a mag tape sort of interface at a particular card slot, so I left the 3 boards or so that managed the tape drive, and then supplied the rest of the interface with a few one-shots and some 8-bit wide registers, and a bunch of timing loops. I used this mostly to back up my S-100 hard drive.

OK, I verified it was indeed made by Pertec. The title block of the drawings doesn't have anything real obvious, but there is a bunch of legal boilerplate advising the restrictions on use of the drawings, and the last words are "prior written permission of Pertec".

Jon

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