Dave's Genesis Tests
A great way to improve emulators is to run code
experiments on the real machine and make sure they act the same way as
on the emulators.
Experiment 4B
Description:
Attempts to measures the hvcounter at the time that the
v-interrupt happens. (4B: Slowed it down so it's easier to read.)
Results (emus)
On most emus the value is about E000-E200.
Results (real genesis)
Brazilian genesis: E024-E035.
Canadian genesis: it usually is E030
the 3 is pretty stable, while the last digit is running through numbers.
Italian Genesis:
The value is: E03x
x = value from 0 to F (i think... it's flipped too fast to see)
The value of 3 is stable for most of the time but changes
(either to 4 or 5... too fast to see which!)
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Experiment 2
Description:
Attempts to measures the hvcounter at the time that the
v-interrupt happens.
The left counter is the hvcounter, and the right counter
is a V-int count.
Results (emus)
On most emus the value is about e000-e200.
Results (real genesis)
On a real Genesis the left counter is random, and the right counter
sounds like it goes up far too fast.
Sounds like I messed up my code! I'll try rewriting it in exp4.
Thanks for all your help!
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