|Description||Jump if X negative|
|Affected||If X<0 P:=P+Δ|
JXN is an assembly instruction. If the X register is negative (bit 15 = 1), it jumps the program execution to the address of the program counter (P register) plus the value of displacement, which can be between -128 to 127. Else it continues the program execution at (P) + 1.