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Description Jump if A negative
Format JAN <disp.>
Code 130 4008
Affected If A<0 P:=P+Δ
Type User
Architecture ND-100, ND-110

JAN is an assembly instruction. If the A 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 in the range -128 .. 127. Else it continues the program execution at (P) + 1.