On Friday, Apr 23, 2004, at 03:22 US/Pacific, Jinx wrote:

>> 1 << GIE = B'10000000'
>> 1 << T0IE= B'00100000'
>> IOR them   B'10100000'
>
> Ah, gotcha. So T0IE is representing, in a user-friendly way, 5

Yep.  And the PIC uses bit numbers rather than masks in the bsf and
related instructions, so all of the symbols are also bit numbers.  The
(1 << bitnum) shift is a standard C hack for converting bit numbers to
masks.  (You wouldn't want to do this at runtime, multiple shifts being
rather inefficient.  But there's not reason not to let the compiler do
the math at compile time.)

BillW

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