/* Program 2 Given variable A holds an 8-bit signed 2's complement number, 
 *           write a program to find the absolute value A. 
 *           Save result back into variable A.
 *           A = |A|
 */

.INCLUDE <m328pdef.inc> 

.DSEG
A:     .BYTE 1

.CSEG
Absolute:
	lds  r16, A    ; load
	tst  r16       ; if (A < 0)
	brpl endAbs
	neg  r16       ; then convert to a positive number
endAbs:
    sts  A, r16    ; store
    rjmp Absolute