Dev : Register 31
Register 31 : Timer
! WARNING : this register doesn't work during VInt !
As any added register, the original Megadrive/Genesis should skip them (as written in the Dev Kit documentation)
Timer register
start/reset and output a timer (based on m68k cycles)
Value is sr000000 where
s=0 Counter output on Message window
s=1 Counter start
r=0 <undefined>
r=1 reset counter
I made it for optimizing issue : you can know how cycles a call take and optimize it.
Copyright ©2007 Kaneda
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