Subject: Re: delay()
To: Bakul Shah <firstname.lastname@example.org>
From: Chris G Demetriou <Chris_G_Demetriou@LAGAVULIN.PDL.CS.CMU.EDU>
Date: 04/07/1995 01:02:50
> I notice that the alpha, sun3 & hp300 port use the
> calibrated multiplier trick, the sparc port is similar to
> i386 port while pc532 uses its own thing. I didn't check
> the rest.
Point of information:
The alpha port uses a "guessed multiplier trick."
I took the number in the Mach port of the Alpha, scaled it by the
speed of the machine i was developing on / the speed of the machine
they developed for, and used that.
In the future, the Alpha port will either:
(1) use a calibrated delay loop
(2) use the Alpha's Process Cycle Counter
to do reasonably delay timing.
(Both methods are more or less equivalent, it's just a matter of
how i end up implementing it... 8-)