> I am using this now, but I am a little dubious, after the first cycle of
> 231, the outer loop overflows to 255, firing up the osciliscope.

I don't think you meant "overflows to 255". Overflows to 0 or
underflows to 255

> d0
> movwf count1

> d1 
> movlw 0xE7 ; E7 = 231 decimal
> movwf counta ; outer loop - delay 231 cycles

> movlw 0x04 ; delay - 4 loops
> movwf countb

> Delay_0
>
> decfsz counta, f
> goto $+2
> decfsz countb, f
> goto Delay_0
> decfsz count1 ,f
> goto d1

AFAICT this section of code, with processor=20MHz, executes in
999.8us. Try it with MPLAB's Stopwatch

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