Difference between revisions of "JPC"

From NDWiki
Jump to: navigation, search
m (Minor grammar changes)
(Register notation uniformity fix)
 
Line 4: Line 4:
 
|Format=JPC <[[displacement|disp.]]>''
 
|Format=JPC <[[displacement|disp.]]>''
 
|Code=132&nbsp;000
 
|Code=132&nbsp;000
|Affected=(X):=(X)+1, If (X)>=0 (P):=(P)+&Delta;  
+
|Affected=X:=X+1, If X>=0 P:=P+&Delta;  
 
|Architecture=[[ND-100]], [[ND-110 CPU|ND-110]]
 
|Architecture=[[ND-100]], [[ND-110 CPU|ND-110]]
 
}}
 
}}

Latest revision as of 08:43, 21 March 2013

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