Date   : Sun, 27 Sep 1998 15:17:53 +0100
From   : Michael Borcherds <emulators@...>
Subject: Opcode timings

Has anyone ever verified for themselves the oft-qtoted
"+1 if page crossed" for opcode timings?

I tried to recreate it when getting precise timings for
my emulator, and failed to find it.

My code went something like:

LDA &1050,X ; this is the opcode we want to time

LDA &3000,X
EOR &FE68 ; low byte of timer 2
STA &3000,X

<loop until screen filled>

so as to fill the screen with "rubbish". Then load this
into emulator and, if all the timings are correct, the
screen will clear again.

>From memory, I was running this on a Master 128.

cheers,

Mike