23 Dec
2020
23 Dec
'20
2 p.m.
On 12/23/20 1:51 PM, Herb Johnson via vcf-midatlantic wrote:
A kind of predecessor was ALU chips like the 74XX181 chips, with related carry and shift and register chips in the series. Again - minicomputer CPUs were often constructed from such chips. Some CPUs were made from bit slices too. They were all the bleeding edge at some point. David Gesswein mentioned the Tektronix graphic terminals as an example.
The DECsystem-2020 and VAX-11/730 (and /725) are additional examples of an entire "large" CPU built around bit-slice processors, Am2901s in these cases. -Dave -- Dave McGuire, AK4HZ New Kensington, PA