Systems Concepts SC-4 computer
billdegnan at gmail.com
Mon Feb 15 09:16:27 CST 2021
A clue from Dan Roganti's web page or did "they" used to refer to SEL as
"Systems" back then and are you saying that the SC=4 is an SEL product?
(Systems [engineering labs] - Concept  ?
On Mon, Feb 15, 2021 at 10:08 AM Eric Moore via cctalk <
cctalk at classiccmp.org> wrote:
> You can see some info on the systems (gould SEL) concept line here, but
> looking at that PDF, systems concepts was something different.
> On Mon, Feb 15, 2021, 4:47 AM Lars Brinkhoff via cctalk <
> cctalk at classiccmp.org> wrote:
> > Anyone ever heard of the Systems Concepts SC-4 computer?
> > "This is an two's-complement 18-bit machine, with 16 general registers
> > and a 16 level priority interrupt system. Its programming ascpects
> > are explained in great detail in the SC-4 Reference Manual, of which a
> > draft is enclosed. Below are times for some typical instructions.
> > Add word on stack (not top word) to general register 1.5 us
> > Multiply general register by memory word 6.2 us
> > Jump 750 ns
> > Push and Jump 1.5 us
> > Compare Immediate 750 ns"
> > From page 6 here:
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