3 Aug
2015
3 Aug
'15
8:48 p.m.
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