Siemens C500 User Manual page 64

JC rel
Function: Jump if carry is set
Description: If the carry flag is set, 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. No flags are affected.
Example: The carry flag is cleared. The instruction sequence
JC
CPL
JC
will set the carry and cause program execution to continue at the instruction
identified by the label LABEL2.
Operation: JC
(PC) ¬ (PC) + 2
if (C) = 1
then (PC) ¬ (PC) + rel
Encoding: 0 1 0 0
Bytes: 2
Cycles: 2
Semiconductor Group
LABEL1
C
LABEL2
0 0 0 0 rel. address
4-38
Instruction Set
C500 Family
1998-04-01