[rescue] SS2 memory?

[Phil Schilling]

George Adkins wrote:
>
> Many of the 3 chip 30's were intended as PeeCee parts in the days when the
> clone stuff was even poorer in quality than it is today.  Many of the Boards
> did not use or even check the parity bit on the memory, so _some_ memory
> makers (the cheapest ones) simply took shortcuts and used really lousy chips
> for the parity bit, (counting on the fact that they'd never get used much) or
> 'faked' it with 'logic parity', where the third chip actually /dev/null's the
> incoming parity data and then during reads, generates the parity bit on the
> fly, and feeds it back to the system.  (obviously useless for actually
> DETECTING single bit memory errors.)
> 
> George
> _______________________________________________
> rescue list - http://www.sunhelp.org/mailman/listinfo/rescue

Boy do I remember that shit all too well.  Memory was soo expensive and they
all tried to cut a corner.

Phil

-- 
"I talk to myself, and when I do that, I know I am talking to an
           an intelligent person" - Nelson DeMille

        Phil Schilling - GCS Tech - phils at gcstech.net