Re: The "Good" Old Days - Complete Specs for DX-10 Operating System

On Wed, 2 Oct 2024 18:07:21 -0700, Peter Flass wrote:

rbowman <bowman@montana.com> wrote:

On Wed, 2 Oct 2024 09:15:02 -0700, John Ames wrote:
 

I've always found the 9900 concept interesting, although its core
assumption about memory speed doesn't really hold up today; much of
the architecture was eventually reincarnated in TI's MSP430 series
micro- controllers, but they ditched the memory-resident register
file. But for the time, context-switching certainly didn't get any
faster than that; only three actual registers to save, but you still
got a comfortably PDP-11ish environment from the programmer's
perspective.

 
I worked on one project that used the 9900. Its claim to fame is TI had
a rad hard version.
 
 

Skidmore College had one.

Figures...  I went to RPI years before the 9900 was even a dream. Let's
just say the girls from Skidmore, Vassar, and Bennington weren't the most
approachable for nerdy engineers. I hadn't thought about Skidmore in
decades.