You need to use the 'pre' tags for code - not 'quote'
See: http://www.8052.com/faqs.phtml?FAQ=120199

Like this:

REF_KA_H:	DB 	'0D','86','04','0C3','9C','82','6F','61'
		DB	'56','4E','47','41','3C','37','34','30'
		DB	'2D','2B','29','27'

REF_KA_L:	DB 	'0D','86','04','0C3','9C','82','6F','61'
		DB	'56','4E','47','41','3C','37','34','30'
		DB	'2D','2B','29','27'

You haven't given any indication of what you're trying to achieve by it - not even any comments in your code - so it's impossible to say whether this will do it or not!

It looks like you're trying to look-up a 16-bit value using a table of high bytes and a table of low bytes?


Again, without knowing what "it" it, it's impossible to say whether the program does "it" or not!

mov  a,sbuf
mov  dptr,#ref_ka_h
movc a,@a+dptr
mov  ka_h,a

mov  a,sbuf
mov  dptr,#ref_ka_h
movc a,@a+dptr
mov  ki_h,a

I think it would be better to read SBUF once and save it - otherwise there's a risk that it may contain a different value on the second read!

Also, could you not just use a single table where adjacent entries are high and low bytes; eg,

REF_KA: DB  <hi-0>, <lo-0>   ; 16 bits for value 0	
            <hi-1>, <lo-1>   ; 16 bits for value 1	
            <hi-2>, <lo-2>   ; 16 bits for value 2
            <>etc

Then you load DPTR once to get the high byte, and simply increment it to get the low byte.

Try it, and see if it is any quicker and/or more compact...