HT82K68 datasheet(36/40 Pages) HOLTEK

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SNZ [m].i

Skip if bit ²i² of the data memory is not 0

Description

If bit ²i² of the specified data memory is not zero, the next instruction is

skipped. If bit ²i² of the data memory is not 0, the following instruction,

fetched during the current instruction execution, is discarded and a dummy

cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed

with the next instruction (1 cycle).

Operation

Skip if [m].i¹0

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

SUB A,[m]

Subtract data memory from the accumulator

Description

The specified data memory is subtracted from the contents of the accumula-

tor, leaving the result in the accumulator.

Operation

ACC ¬ ACC+[m]+1

Affected flag(s)

TC2 TC1

ÖÖÖÖ

SUBM A,[m]

Subtract data memory from the accumulator

Description

The specified data memory is subtracted from the contents of the accumula-

tor, leaving the result in the data memory.

Operation

[m] ¬ ACC+[m]+1

Affected flag(s)

TC2 TC1

ÖÖÖÖ

SUB A,x

Subtract immediate data from the accumulator

Description

The immediate data specified by the code is subtracted from the contents of

the accumulator, leaving the result in the accumulator.

Operation

ACC ¬ ACC+x+1

Affected flag(s)

TC2 TC1

ÖÖÖÖ

HT82K68E

August 8, 2000

Preliminary

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