Systems Concepts SC-4 computer

[Bill Degnan]

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 [4] ?

Bill

On Mon, Feb 15, 2021 at 10:08 AM Eric Moore via cctalk <
cctalk at classiccmp.org> wrote:

> http://mnembler.com/ragooman/computers_mini_products.html
>
> You can see some info on the systems (gould SEL) concept line here, but
> looking at that PDF, systems concepts was something different.
>
> -Eric
>
>
> 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:
> >
> >
> http://people.csail.mit.edu/saltzer/Multics/MHP-Saltzer-060508/filedrawers/141.graphics-system/Scan%203.PDF
> >
>