Hi all,

I have build a look up table to linearize the AC curver for a light dimmer, and I need to compare this 16-bit value with the timer 0 value, when I compare just the high byte the dimmer works, but when I try to simply read the look up for the low byte it get stuck.

sorry,... bute here is the code:

mov dptr, #0x1E00 ; High byte look up table
mov a, LIGHTLVL ; light level from 0-255
mov dpl, a
mov a, #0x00
movc a, @a+dptr
clr c
clr TR0 ; stop the timer
subb a, TH0 ; test high byte
inc dph ; 0x1F00 = low byte look up table
mov a, #0x00
movc a, @a+dptr
subb a, TL0 ; test low byte
setb TR0 ; timer 0 on
jnc DontGate ; Dont trigger light if TIMER 0 is
; less then the look up value


Thanks already....., crying to sleep (3:47am), Gabriel