Dear Dan Henry,

I have your code tested,
It is good and working,

Again, thank you very much
Kurnia Brahmana


Dan Henry wrote:
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Taking your requirements quite literally, "rotate from addr 20h to 2fh", means rotate as opposed to shift bits up (i.e., left) and the bit at bit address 7FH rotates around to bit address 00H.
MOV R0,#020H
MOV B,#16
MOV C,07FH
LOOP: MOV A,@R0
RLC A
MOV @R0,A
INC R0
DJNZ B,LOOP
NOTE: This code has not assembled or tested.