参数资料
型号: 780208
厂商: NEC Corp.
英文描述: Common to 78K/0 Series
中文描述: 共同的78K / 0系列
文件页数: 84/129页
文件大小: 644K
代理商: 780208
84
CHAPTER 5 EXPLANATION OF INSTRUCTIONS
User's Manual U12326EJ4V0UM
Decimal Adjust Register for Subtraction
ADJBS
Decimal Adjustment of Subtraction Result
[Instruction format]
ADJBS
[Operation]
Decimal Adjust Accumulator for Subtraction
[Operand]
None
[Flag]
Z
AC
CY
×
×
×
[Description]
The A register, CY flag and AC flag are decimally adjusted from their contents. This instruction carries out
an operation having meaning only when the BCD (binary coded decimal) data is subtracted and the
subtraction result is stored in the A register (in all other cases, the instruction carries out an operation having
no meaning).
See the table below for the adjustment method.
If the adjustment result shows that the A register contents are 0, the Z flag is set (1). In all other cases,
the Z flag is cleared (0).
Condition
Operation
AC = 0
CY = 0
A
A, CY
0, AC
0
CY = 1
A
A–01100000B, CY
1, AC
0
AC = 1
CY = 0
A
A–00000110B, CY
0, AC
0
CY = 1
A
A–01100110B, CY
1, AC
0
相关PDF资料
PDF描述
780228 Common to 78K/0 Series
780308 Common to 78K/0 Series
780308Y Common to 78K/0 Series
78058FY Common to 78K/0 Series
78064B Common to 78K/0 Series
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