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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 :
22
Ze r o Pa g e Bit
Zero Page Bit
Specifies one bit of the contents in a Zero Page
memory location as the data for the instruction.
Operand is used as the low-order byte of the address
in the Zero Page memory location and 00
high-order byte. The bit position is designated by the
high-order three bits of the Op-code.
CLB, SEB
Mnemonic
∆
∆
CLB
5,$44
Zero page
bit 5
Zero page
designation
Bit designation
1
0
Operand (44
Zero page
bit 5
Machine code
Memory
00
16
44
?
16
FF
16
Op-code(BF
)
16
1
1
1
1
1
1
)
16
0
44
16
Addressing mode
as the
16
BF
44
16
16
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