OT, but info needed: RAM uprade

From: SUPRDAVE_at_aol.com <(SUPRDAVE_at_aol.com)>
Date: Tue Dec 29 20:45:19 1998

In a message dated 12/29/98 8:43:40 PM EST, kurtkilg_at_geocities.com writes:

<< On Tue, 29 Dec 1998 ard_at_p850ug1.demon.co.uk wrote:
> Totally crazy designs like the IBM PC interrupt system.
 Well, I've heard many complaints about it, but I don't know what's
 actually wrong with it, and I doubt I would understand if you told me. But
 try anyway.
 ---------------------------------- >>
the way i understand it is that the pc interrupt system is edge triggered. i
think an interrupt went low only momentarily and if the machine happened to
overlook that interrupt, the machine would hang. on the ps2 models, the
interrupts on that are level sensitive, meaning that an interrupt request goes
low and stays low until it's satisfied. there is much less possibility of
level sensitive interrupts going unnoticed. ps2 models can also share IRQs.
Received on Tue Dec 29 1998 - 20:45:19 GMT

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