Intel 80C196NU ユーザーズマニュアル
A-5
INSTRUCTION SET REFERENCE
Table A-3 shows the effect of the PSW flags or a specified condition on conditional jump instruc-
tions. Table A-4 defines the symbols used in Table A-6 to show the effect of each instruction on
the PSW flags.
tions. Table A-4 defines the symbols used in Table A-6 to show the effect of each instruction on
the PSW flags.
.
Table A-3. Effect of PSW Flags or Specified Conditions on Conditional Jump Instructions
Instruction
Jumps to Destination if
Continues if
DJNZ
decremented byte
≠
0
decremented byte = 0
DJNZW
decremented word
≠
0
decremented word = 0
JBC
specified register bit = 0
specified register bit = 1
JBS
specified register bit = 1
specified register bit = 0
JNC
C = 0
C = 1
JNH
C = 0 OR Z = 1
C = 1 AND Z = 0
JC
C = 1
C = 0
JH
C = 1 AND Z = 0
C = 0 OR Z = 1
JGE
N = 0
N = 1
JGT
N = 0 AND Z = 0
N = 1 OR Z = 1
JLT
N = 1
N = 0
JLE
N = 1 OR Z = 1
N = 0 AND Z = 0
JNST
ST = 0
ST = 1
JST
ST = 1
ST = 0
JNV
V = 0
V = 1
JV
V = 1
V = 0
JNVT
VT = 0
VT = 1 (clears VT)
JVT
VT = 1 (clears VT)
VT = 0
JNE
Z = 0
Z = 1
JE
Z = 1
Z = 0
Table A-4. PSW Flag Setting Symbols
Symbol
Description
✓
The instruction sets or clears the flag, as appropriate.
—
The instruction does not modify the flag.
↓
The instruction may clear the flag, if it is appropriate, but cannot set it.
↑
The instruction may set the flag, if it is appropriate, but cannot clear it.
1
The instruction sets the flag.
0
The instruction clears the flag.
?
The instruction leaves the flag in an indeterminate state.