On Wed, 1 Sep 2021 12:50:35 -0500, Louis Ohland <
ohland@charter.net>
wrote:
http://www.righto.com/2021/01/ibm-paperweight-teardown-reverse.html
Sounds pretty accurate. They probably don't know the first 10 mod 145s
had Core Storage (M2I arrays like the 360 mod 30). We had S/N 20001
and 20002 in my territory in internal accounts. They needed machines
and all the customer ready ones were spoken for. These were
development machines. They are right about the levels too. SLT ran
signal levels of 0 and 3v MST was 1.9v to 0.9v. SMS, the discrete
component on card technology was 0 and 6v and some ran 12v.
Other than the logic levels and the 4 wide cards, MST and SLT didn't
mean anything to us in any practical sense.
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