JPC

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 increment the X register by one. If the X register is positive or zero (bit 15 = 0), it jump the program execution to the address of the program counter (P register) plus the value of displacement, that can be between -128 to 127. Else it continue the program execution at (P) + 1.

References

• Norsk Data Document ND–06.014.02 ND-100 REFERENCE MANUAL Page 139
• Norsk Data Document ND–06.029.01 ND-110 Instruction Set Page 80