gc80c510 CORERIVER Semiconductor, gc80c510 Datasheet - Page 149

• Manufacturer Part Number: gc80c510
• Description: Eprom/rom 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

JNC
MiDAS1.1 Family
Description:
Operation:
Encoding:
rel
Function:
Example:
Cycles:
Bytes:
Jump if Carry not set
If the carry flag is a zero, branch to the address indicated; otherwise proceed
with the next instruction. The branch destination is computed by adding the
signed relative-displacement in the second instruction byte to the PC, after
incrementing the PC twice to point to the next instruction. The carry flag is not
modified.
The carry flag is set. The instruction sequence,
JNC LABEL1
CPL C
JNC LABEL2
will clear the carry and cause program execution to continue at the instruction
identified by the label LABEL2.
2
3
JNC
(PC)
IF (C) = 0
0
THEN (PC)
←
1
(PC) + 2
0
1
0 0 0 0
←
(PC) + rel
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