Hi Andy:


Ok I over did it but Dan K. has three changes in program so comments in group of changes should not be to much. I am only doing what I read in "8051 Microcontroller and Embedded Systems by Mazidi you should comment on each line code. Remember he trying teach us good habits in programming code.

Here's example what I mean.

Write program to (a)load the accumulator with the value 55H, and (b)complement the ACC 700 times.


MOV A,#55 ;A=55H
MOV R3,#10 ;R3=10, THE OUTER LOOP COUNT
NEXT: MOV R2,#70 ;R2=70, THE INNER LOOP COUNT
AGAIN: CPL A ;COMPLEMENT A REGISTER
DJNZ R2,AGAIN ;REPEAT IT 70 TIMES (INNER LOOP)
DJNZ R3,NEXT

Maybe this is too many coments but it has to help newbie to better understand the program.

comments please be nice I have so much to learn and will except your opinions.

Best reguards,


Ralph Sack