参数资料
型号: 780018Y
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: 112/129页
文件大小: 644K
代理商: 780018Y
112
CHAPTER 5 EXPLANATION OF INSTRUCTIONS
User's Manual U12326EJ4V0UM
Branch if True
BT
Conditional Branch by Bit Test (Byte Data Bit = 1)
[Instruction format]
BT bit, $addr16
[Operation]
PC
PC+b+jdisp8 if bit = 1
[Operand]
Mnemonic
Operand(bit,$addr16)
b(Number of bytes)
BT
saddr.bit, $addr16
3
sfr.bit, $addr16
4
A.bit, $addr16
3
PSW.bit, $addr16
3
[HL].bit, $addr16
3
[Flag]
Z
AC
CY
[Description]
If the 1st operand (bit) contents have been set (1), data is branched to the address specified by the 2nd
operand ($addr16).
If the 1st operand (bit) contents have not been set (1), no processing is carried out and the subsequent
instruction is executed.
[Description example]
BT FE47H.3, $55CH;
When bit 3 at address FE47H is 1, data is branched to 055CH (with the start of this
instruction set in the range of addresses 04DAH to 05D9H).
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