Nintendo GAME BOY Programming Manual page 104

Game Boy Programming Manual
Examples: When A = 3Bh, (HL) = 4Fh, H = 2Ah, and CY = 1,
SBC A, H ;
SBC A, 3Ah ; A ← 00h, Z ← 1, H ← 0, N ← 1 CY ← 0
SBC A, (HL) ; A ← EBh, Z ← 0, H ← 1, N ← 1 CY ← 1
AND s
Takes the logical-AND for each bit of the contents of operand s and register A, and stores the results in
register A.
r, n, and (HL) are used for operand s.
Examples: When A = 5Ah, L = 3Fh and (HL) = 0h,
AND L
AND 38h ; A ← 18h, Z ← 0, H ← 1, N ← 0 CY ← 0
AND (HL)
OR s
Takes the logical-OR for each bit of the contents of operand s and register A and stores the results in
register A. r, n, and (HL) are used for operand s.
SBC A, r
SBC A, n
SBC A. (HL)
A ← 10h, Z ← 0, H ← 0, N ← 1 CY ← 0
A ← A
AND r
AND n
AND (HL)
A ← 1Ah, Z ← 0, H ← 1, N ← 0 CY ← 0
;
; A ← 00h, Z ← 1, H ← 1, N ← 0 CY ← 0
AVs
CYCL 7 6 5 4 3
1 10 011
2 11 011
2 10 011
CY
∧
s 0
CYCL 7 6 5
1 10 100
2 11 100
2 10 100
CY
0
104
2 1 0
r
110
n
110
H N Z CYCL
1 0 * --
4 3 2 1 0
r
110
n
110
H N Z CYCL
0 0 * --
7 6 5 4 3 2 1 0
-- -- --
7 6 5 4 3 2 1 0
-- -- --