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1.10. Etc.
U-page Addressing Mode
The operand becomes offset address in U-page(FF00h~FFFFh). The program is jumped to the specified
address in U-page.
OP CODE
Example)
4F 35
Table CALL
n
The vector table of TCALL is determined by the upper 4bits of op code. The domain of TCALL vector is in
address FFC0
~FFDF
H
OP CODE
Example)
4A
upage
upage
PCALL 35H
.
H
TCALL 4
PC
1
1
1
1
F
h
Op code
0
1
0
0
reverse
1
1
1
1
1
1
0
1
0
1
1
0
F
D
6
h
h
h
Addressing Mode
MEMORY
Op code ( 4F )
Operand ( 35 )
FF00
NEXT
FF35
FFFF
MEMORY
Op code ( 4A )
A
h
NEXT
D125
FF00
T/vector1 ( 25 )
FFD6
h
T/vector2 ( D1 )
FFD7
h
FFFF
h
h
U Page
h
h
h
U Page
h
15
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