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+; ( n1 -- n2 )
+; Logic
+; 2-complement
+VE_NEGATE:
+ .dw $ff06
+ .db "negate"
+ .dw VE_HEAD
+ .set VE_HEAD = VE_NEGATE
+XT_NEGATE:
+ .dw DO_COLON
+PFA_NEGATE:
+ .dw XT_INVERT
+ .dw XT_1PLUS
+ .dw XT_EXIT