3 Nov
2005
3 Nov
'05
5:26 p.m.
>>>> "Chuck" == Chuck Guzis
<cclist at sydex.com> writes:
Chuck> On 11/3/2005 at 12:03 PM J.C. Wren wrote:
> Do you remember the CDC song?
>
> "I/O, I/O, it's off to disk we go! Put CIO in RA+1, I/O, I/O..."
Chuck> Heck, I can probably remember most of the PPU overlay names
Chuck> and what they did.
Ok, let's test that. 1LT?
:-)
(I've been doing battle with that particular one recently...)
Chuck> For a time, I worked on a transaction system on the Cybers,
Chuck> where system calls were done exclusively with XJ instructions
Chuck> and not RA+1 stores. Made much more sense when your system
Chuck> was CMTR based--and on this particular system (swaps were done
Chuck> to ECS), exactly where RA was for any given job could change
Chuck> very rapidly. But then, 7000 SCOPE did much the same thing,
Chuck> didn't it?
Before my time... I worked on PLATO when it ran on 6000 series NOS.
paul