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