[Coco] 6x09 instruction timings

Joel Ewy jcewy at swbell.net
Sat Jan 20 18:01:20 EST 2007


Ok, stupid question.

I know that the Q clock and the E clock are 180 degrees out of phase,
and that the CPU uses this relationship to separately clock different
internal states.  But when reading instruction set timings, a cycle is
one complete cycle of the E clock, without respect to what Q is doing
(though their period is the same), is that correct?  So at 1.78 MHz, 1
cycle of the E clock is a little more than .56 microseconds, if I
understand this correctly.

Just looking at Sockmaster's Hicolor code and thinking about how much
processing could be done during the scan lines, vertical blanking, etc.

JCE




More information about the Coco mailing list