JNC: Difference between revisions
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'''JNC''' is an assembly instruction. It | '''JNC''' is an assembly instruction. It increments the [[X register]] by one. 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]], that can be between -128 to 127. Else it continues the program execution at (P) + 1. | ||
== References == | == References == | ||
Revision as of 14:47, 30 June 2010
| JNC | |
|---|---|
| Description | Count and jump if X register is negative. |
| Format | JNC <disp.> |
| Code | 132 4008 |
| Affected | (X):=(X)+1, If (X)<0 (P):=(P)+Δ |
| Type | User |
| Architecture | ND-100, ND-110 |
JNC is an assembly instruction. It increments the X register by one. 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, that can be between -128 to 127. Else it continues 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