IBM 5150 maximum memory?

Sridhar Ayengar ploopster at
Thu Apr 24 22:47:11 CDT 2008

Jim Leonard wrote:
> Eric Smith wrote:
>> (e.g., the stupid
>> edge-triggered interrupts, where anyone with the slightest bit of
>> experience would have known to use negative level triggered interrupts).
> I do not have the slightest bit of experience:  Can you explain why 
> level-triggered interrupts are better than edge-triggered?

Makes it easier for multiple devices to share the same interrupt line. 
It's why there's less contention for IRQs in PCI and MCA than in ISA.

Peace...  Sridhar

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