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SEV
From SnesLab
SEV (SEt Overflow) is a mnemonic for a non-existant 6502 instruction.
To set the overflow flag, consider using SEP or BIT. Like this:
SEP #$40
A common way is to use BIT on the address of a byte in ROM that has bit 6 set, like an RTS.[1]
See Also
External Links
- Clark, Bruce. http://www.6502.org/tutorials/vflag.html
- Eyes & Lichty, page 263