Chapter 3 Instruction Definition
SDZA [m]
Description
Skip if decrement Data Memory is zero with result in ACC
The contents of the specified Data Memory are first decremented by 1. If the result is 0, the
following instruction is skipped. The result is stored in the Accumulator but the specified
Data Memory contents remain unchanged. As this requires the insertion of a dummy in-
struction while the next instruction is fetched, it is a two cycle instruction. If the result is not
0, the program proceeds with the following instruction.
ACC
¬
[m]
-
1
Skip if ACC = 0
None
Set Data Memory
Each bit of the specified Data Memory is set to 1.
[m]
¬
FFH
None
Set bit of Data Memory
Bit i of the specified Data Memory is set to 1.
[m].i
¬
1
None
Skip if increment Data Memory is 0
The contents of the specified Data Memory are first incremented by 1. If the result is 0, the
following instruction is skipped. As this requires the insertion of a dummy instruction while
the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program
proceeds with the following instruction.
[m]
¬
[m] + 1
Skip if [m] = 0
None
Skip if increment Data Memory is zero with result in ACC
The contents of the specified Data Memory are first incremented by 1. If the result is 0, the
following instruction is skipped. The result is stored in the Accumulator but the specified
Data Memory contents remain unchanged. As this requires the insertion of a dummy in-
struction while the next instruction is fetched, it is a two cycle instruction. If the result is not
0 the program proceeds with the following instruction.
ACC
¬
[m] + 1
Skip if ACC = 0
None
Operation
Affected flag(s)
SET [m]
Description
Operation
Affected flag(s)
SET [m].i
Description
Operation
Affected flag(s)
SIZ [m]
Description
Operation
Affected flag(s)
SIZA [m]
Description
Operation
Affected flag(s)
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