Difference between revisions of "Programming:Reverse A"

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(added reverse A routine)
 
m (layout)
 
Line 5: Line 5:
 
;- Reverse a
 
;- Reverse a
 
;Input: A
 
;Input: A
;Output: Reversed A
+
;Output: Reversed A
 
;Destroys: B
 
;Destroys: B
;Length: 18 bytes
+
;Length: 18 bytes
;Author: calcmaniac84
+
;Author: calcmaniac84
 
;
 
;
 
ReverseA:
 
ReverseA:

Latest revision as of 15:56, 18 April 2011

This routine will return the reverse order of register A.

;
;- Reverse a
;Input:		A
;Output:	Reversed A
;Destroys:	B
;Length: 	18 bytes
;Author: 	calcmaniac84
;
ReverseA:
	ld b,a
	rrca
	rrca
	xor b
	and %10101010
	xor b
	ld b,a
	rrca
	rrca
	rrca
	rrca
	xor b
	and %01100110
	xor b
	rrca
	ret