Branch on overflow set

Take a conditional branch if the V bit is set (1)

Table

BVS | Branch on Overflow Set
================================================

                                 N V - B D I Z C
                                 - - - - - - - -

addressing       assembler    opc  bytes  cycles
------------------------------------------------
relative         BVS $nnnn    70     2     2 tp

p: +1 if page is crossed
t: +1 if branch is taken