Is your uC an 8051 compatible type?

If the answer is yes, I think your code is very strange, at least in the reset vector entry:

ORG 00h ;Reset
ACALL MAIN ; Starts program

Why a sobroutine call where a ljmp is the commonly used option?.

What will happen when your uC executes the RET instruction in the following lines? :

MAIN: ACALL LCD_iNIT
RET

I think it will execute the lines:

Dly1ms: PUSH ACC MOV ACC,R0 ; R0 use as a counter
MOV R0,#0
(...)

Is this what you really want?.


Regards,
Alfredo.