>>Michael R Zucca wrote:
>> On a side note, do any IIci/IIsi owners out there tend to get more
>> problems with time critical code than other people? The reason I ask is
>> that when the video DAC has grab memory from the CPU to draw the screen
>> the CPU is blocked from using that entire bank of RAM. If NetBSD is in that
>> bank and, say, an interrupt occurs then the CPU has to wait to fetch the
>> code for the interrupt handler (unless it's cached) while the DAC is cycle
>> stealing. Just wondering.
>
>I use a NuBus video card, so this doesn't really effect me.  This could be
>a legitimate problem, tho, I guess.  As a IIci user, if there is anything
>I could do that would really help. please let me know.
>

This would be hard to guage since the mac clocks are screwed up by interupt
priority level being different than unix expects.  I know that my clocks
used to run slow, but I never really pay attention, and I don't have any
reason to attribute the slow down to interrupt code fetch being delayed.

---------
Christopher R. Bowman
crb@eng.umd.edu
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