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Re: MFP automatic end interrupt?
Posted by: evil Apr,18.2015-11:26 

We use automatic end of interrupt to save some cycles, the bclr you described seems to be 20 cycles, and doing that once per scanline (200 lines), there are almost 8 scans CPU wasted. Or almost 11 scans with top/lower borders away. 2.5% or 3.5%.

As you say, if one interrupt hasn't finished before next one happen it can probably become a bit hairy with the automatic end. But I think some real MFP wizard (Alien, where are you?) :) need to do the tech crunch.


So are we going to be treated with some Atari-release from the 1 Infinite Loop camp? :-)

--
Anders Eriksson
ae@dhs.nu







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Topic Posted by  Date 
MFP automatic end interrupt? PeyloW Apr,17.2015-19:22
  Re: MFP automatic end interrupt? PeyloW Apr,17.2015-19:24
  Re: MFP automatic end interrupt? evil Apr,18.2015-11:26
    Re: MFP automatic end interrupt? PeyloW Apr,20.2015-16:15


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