Re: A86: Interrupts
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Re: A86: Interrupts
At 22:13 1998-12-05 -0500, you wrote:
>will enable interrupts. What happens when you do this? How many T-states does
>each take? Most importantly, would it be wise or a good idea to
>disable/renable interrups during "Computationally Expensive" parts of code?
I can't recall the number of T-states, but that shouldn't be too
important as you most often only use ei/di instructions at the beginning
and the end of a big part of the source.
Disabling the interrupts will not gain much speed, unless there's a badly
written user installed interrupt. The most common reason to disable
interrupts is probably to use the IY register and the shadow registers.
//Jimmy Mårdell
E-mail: yarin@acc.umu.se
Homepage: http://www.acc.umu.se/~yarin/
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