JXN: Difference between revisions

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(JXN instruction)
 
m (Minor grammar fixes)
 
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|Format=JXN <[[displacement|disp.]]>''
|Format=JXN <[[displacement|disp.]]>''
|Code=133&nbsp;400
|Code=133&nbsp;400
|Affected=If X<0 (P):=(P)+&Delta;  
|Affected=If X<0 P:=P+&Delta;  
|Architecture=[[ND-100]], [[ND-110 CPU|ND-110]]
|Architecture=[[ND-100]], [[ND-110 CPU|ND-110]]
}}
}}


'''JXN''' is an assembly instruction. If the [[X register]] is negative (bit 15 = 1), 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.
'''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.


== References ==
== References ==

Latest revision as of 11:14, 4 February 2019

JXN
Description Jump if X negative
Format JXN <disp.>
Code 133 4008
Affected If X<0 P:=P+Δ
Type User
Architecture ND-100, ND-110

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.

References