GM P4 $400x regs

[Barry E. King]

> -----Original Message-----
> Now that I look at these again, I think you're right about 4006 it and the
> rate at which 4005 counts up - 32.768kHz. At the start of the routine at
> B38D 4006 is read, #$CD (205) is added to it and the value written back to
> 4006. 205*30.518uS (the period of 32.768kHz) is 6.25mS or so. This number
> rings a bell for some reason...where the heck have I heard this
> number before?


2^(16-1) == 32768.  Maximum positive value of the typical implementation for
a 16 bit signed integer.


Regards,

Barry