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O/V

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O/V is the Super FX's overflow flag. It is bit 4 of 3030h.

It is affected by the following instructions:

ADC R_n
ADC #n
ADD R_n
ADD #n
CMP R_n
MERGE
MOVES
SBC R_n
SUB R_n
SUB #n

See Also

Reference

9.3 "Operator Functions" on page 2-9-2 of Book II of the official Super Nintendo development manual
Table 2-4-2 GSU Status Register Flags on page 2-4-4 of Book II, lbid.

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