JPC

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JPC
Description Count and jump if X register is positive or zero.
Format JPC <disp.>
Code 132 0008
Affected (X):=(X)+1, If (X)>=0 (P):=(P)+Δ
Type User
Architecture ND-100, ND-110

JPC is an assembly instruction. It increments the X register by one. If the X register is positive or zero (bit 15 = 0), 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.

References