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IN STRUC TION S
Ad d r e s s in g m o d e :
F u n c tio n :
In s tr u c tio n s :
Ex a m p le :
Ze r o Pa g e Y
Zero Page Y
Specifies the contents in a Zero Page memory
location as the data for the instruction. The address
in the Zero Page memory location is determined by
the following:
(a) Operand and the Index Register Y are added (if as
a result of this addition a carry occurs, it is ig-
nored).
(b) The result of the addition is used as the low-order
byte of the address and 00
byte.
LDX, STX
Mnemonic
∆
∆
LDX
$62,Y
Zero page
(X) ← XX
Data(XX
16
Op-code (B6
Operand (62
Machine code
Memory
00
16
)
68
16
16
FF
16
Zero page Y
designation
)
16
)
+ 06
= 68
16
16
Contents of Index Register Y
Addressing mode
as the high-order
16
B6
62
16
16
16
11
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