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STA
(M) ← (A)
Op e r a t io n :
F u n c t io n :
This instruction stores the contents of A in M.
The contents of A does not change.
St a t u s fla g :
No change
Addressing mode
∆STA∆$zz
Zero page
∆STA∆$zz,X
Zero page X
∆STA∆$hhll
Absolute
∆STA∆$hhll,X
Absolute X
∆STA∆$hhll,Y
Absolute Y
∆STA∆($zz,X)
(Indirect X )
∆STA∆($zz),Y
(Indirect Y)
90
ST
A
ORE
CCUMULATOR IN MEMORY
Statement
Machine codes
Byte number
85
, zz
16
16
95
, zz
16
16
8D
, ll
, hh
16
16
16
9D
, ll
, hh
16
16
16
99
, ll
, hh
16
16
16
81
, zz
16
16
91
, zz
16
16
STA
Cycle number
2
4
2
5
3
5
3
6
3
6
2
7
2
7
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