Re: [cc65] Profiling, timing on the Apple //e

From: David A. Lyons <>
Date: 2009-08-23 01:39:51
> I can imagine how surprised you might be to hear that in general an  
> apple2 actually does _NOT_ have any timer interrupt facility.

On the other hand, the OP mentioned wanting to do timing specifically  
on an Apple IIe, which does have a vertical blanking (VBL) interrupt  
available (60 Hz for an NTSC display, 50 Hz for PAL).


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Received on Sun Aug 23 01:40:02 2009

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