Shifting left and right could give you 4 or 8 hours with 4 or 8 minute
increments.
> If I remember correctly, TR uses 6 bits of a byte to hold the bandmap decay
> time. The largest number one can store in 6 bits is 63. If you increased it
> to use all 8 bits of a byte, the largest number you could store would be
> 255, which would give you the four hours (plus 15 minutes) you want.
>
> But, I'm pretty sure that TR is using the other two bits of that byte
> for something else important.
--
Juhan ES5QX
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