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SEV: Difference between revisions
From SnesLab
(SEP example) |
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=== External Links === | === External Links === | ||
# Clark, Bruce. http://www.6502.org/tutorials/vflag.html | # Clark, Bruce. http://www.6502.org/tutorials/vflag.html | ||
# page 263, https://archive.org/details/0893037893ProgrammingThe65816/page/263 | # [[Eyes & Lichty]] page 263, https://archive.org/details/0893037893ProgrammingThe65816/page/263 | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Non-Existant Instructions]] | [[Category:Non-Existant Instructions]] | ||
Revision as of 16:21, 1 August 2024
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]