DT-Ints latency and other interrupt conciderations

[Darrel Taylor]

With PBPL, all internal System and T? variables are LONGs.

All multiplications and divisions are done as Longs, even if they are byte vars.
Most things that get put in a System var with a CALL to the library are done as a Long.

IF ByteVar1 >= ByteVar2 THEN             ; <-- Long 
IF ByteVar1 = ByteVar2 THEN              ; <-- Byte
WordVar = WordVar /* Const               ; <-- Long
ByteVar1 = ByteVar1 + Const              ; <-- Byte
ByteVar1 = ByteVar1 + (ByteVar2 >> 2)    ; <-- Long
ByteVar1 = ByteVar1 + (ByteVar2 >> 1)    ; <-- Byte

Having 32-bit vars is nice, ... unless you need speed.

Is there a particular reason you need PBPL?
Maybe we can cut that down to word sized math so you can go back to PBPW.
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