I did output the Revs and it increment without any input:
not as fast, takes about 2 seconds to get to ten.
The odd thing is that it increment without changes to RA4.
I am going to try your code you posted and be back later
thanks for your time

Mainloop:
TMR0 = 0 ' clear count before each pass

' output 8 clocks on RB0 to RA4/T0CKI
'instead, input from sensor


Revs = TMR0 ' get TMR0 count
Counter = Revs + 1
IF OPTION_REG.0 THEN
LCDOUT $FE,1,"Revs: ", DEC Revs
ELSE
lcdout $FE,$C0, "Counter2: ", DEC Counter
ENDIF
OPTION_REG.0 = OPTION_REG.0 ^ 1 ' toggle 1:4 or 1:2 prescale

GOTO Mainloop

end