Nintendo GAME BOY Programming Manual page 96

Game Boy Programming Manual
LD r, n
Loads 8-bit immediate data n into register r
Example: L D B, 24h ; B
LD r, (HL)
Loads the contents of memory (8 bits) specified by register pair HL into register r.
Example: When
(HL) = 5Ch,
LD H, (HL) ; H ←
LD (HL),
Stores the contents of register r in memory specified by register pair HL.
Example: When
A = 3Ch, HL = 8AC5h
LD (HL), A ; (8AC5h) ← 3Ch
LD (HL),
Loads 8-bit immediate data n into memory specified by register pair HL.
Example: When HL = 8AC5h,
LD (HL), 0 ; 8AC5h ← 0
LD A,
Loads the contents specified by the contents of register pair BC into register A.
Example: When (BC) = 2Fh,
LD A, (BC) ; A ← 2Fh
LD A,
Loads the contents specified by the contents of register pair DE into register A.
Example: When (DE) = 5Fh,
LD A, (DE) ; A ← 5Fh
r ← n
.
←
24h
r ← (HL)
5Ch
(HL) ← r
r
(HL) ← n
n
A ← (BC)
(BC)
A ← (DE)
(DE)
CY H N
-- -- --
CY H N
-- -- --
CY H N
-- -- --
CY H N
-- -- --
CY H N
-- -- --
CY H N
-- -- --
96
Z CYCL 7 6 5 4 3
-- 2 00 r
n
Z CYCL 7 6 5 4 3
-- 2 01 r
Z CYCL 7 6 5 4 3
-- 2 01 110
Z CYCL 7 6 5 4 3
-- 3 00 110
n
Z CYCL 7 6 5 4 3
-- 2 00 001
Z CYCL 7 6 5 4 3
-- 2 00 011
2 1 0
110
2 1 0
110
2 1 0
r
2 1 0
110
2 1 0
010
2 1 0
010