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J SR
(M(S)) ← (PC
Op e r a t io n :
(S) ← (S) – 1
(M(S)) ← (PC
(S) ← (S) – 1
After the above operations, if the addressing mode is
(a) Absolute, then
(b) Special page, then
(c) Zero page Indirect, then
F u n c t io n :
This instruction stores the contents of the PC in the stack, then
jumps to the address designated by the following addressing
modes:
Absolute
Special Page
Zero Page Indirect Absolute
St a t u s fla g :
No change
Addressing mode
Absolute
Special page
Zero page Indirect
(Note) "\" (5C
of the ASCII code) denotes special page. hh
16
in the special page addressing mode.
66
J
UMP TO
)
H
)
L
(PC) ← hhll
) ← ll
(PC
L
) ← FF
(PC
H
) ← (zz)
(PC
L
) ← (zz+1)
(PC
H
Statement
∆JSR∆$hhll
∆JSR∆\$hhll
(Note)
∆JSR∆($zz)
S
R
UB
OUTINE
16
Machine codes
20
, ll
, hh
16
16
16
22
, ll
16
16
02
, zz
16
16
J SR
Byte number
Cycle number
3
6
2
5
2
7
must be FF
16
16
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