bordyn cheevatanakonkul:

No!
cjne a, Rn, relative;register addressing
is not found in my Intel manual.

Then I test with the below source file.
---------------------------------------
org 0000H
mov r0, #1
mov r1, #2
mov a, r0
cjne a, r1, loop
;error for register addressing

;cjne a,p1,loop
;no error for direct addressing

loop: sjmp loop
end
---------------------------------------

If you try to assemble it using asm51, syntax error report on the line
"cjne a, r1, loop"

So, the method that you suggest will failed. Tell me if you have any better suggestion.

thanks

regards
yccheok