JNC              Jump If No Carry                    Flags: not altered

JNC short-label

Jump Condition:  Jump if CF = 0

JNC transfers control to short-label if the Carry Flag is clear. The
target of the jump must be within -128 to +127 bytes of the next
instruction.

                                                                          
Operands                  Clocks   Transfers  Bytes   Example
short-label              16 or 4       -        2     JNC CARRY_CLEAR
                                                                          

Note:          Use JC, Jump if Carry, to jump if the carry flag is
set.

See also: JC

JNC Jump If No Carry