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RIOT Timer


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#1 Schmutzpuppe OFFLINE  

Schmutzpuppe

    Dragonstomper

  • 782 posts
  • Location:Germany

Posted Sat Jul 9, 2005 6:53 PM

Hi,

does anybody have good documentation/demo source about the RIOT?
I am especially interested in the timer function.

#2 EricBall OFFLINE  

EricBall

    Dragonstomper

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  • Location:Markham, Ontario, Canada

Posted Mon Jul 11, 2005 10:08 AM

http://www.6502.org/...s_6532_riot.pdf

Note: there is a "quirk" with the RIOT timer on the 7800. Because the RIOT clock line is slaved to the 6502, which is controlled by MARIA, it gets impacted by the "downshift" the CPU makes when it accesses the TIA and RIOT.

#3 Schmutzpuppe OFFLINE  

Schmutzpuppe

    Dragonstomper

  • 782 posts
  • Location:Germany

Posted Wed Jul 13, 2005 10:27 AM

Thanks for the link!




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