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Memory/Accumulator Select: Difference between revisions
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=== Reference === | === Reference === | ||
* [[Eyes & Lichty]], | * [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/422 page 422], Table 18.2. 65x Flags. | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Flags]] | [[Category:Flags]] | ||
[[Category:65c816 additions]] | [[Category:65c816 additions]] | ||
Revision as of 01:12, 7 August 2024
The Memory/Accumulator Select (M) flag exists in the processor status register (bit 5) of the 65c816. It indicates whether the accumulator is 8 or 16 bits wide:
- When clear, the accumulator is 16 bits wide.
- When set, the accumulator is 8 bits wide, but the high byte (B) is still retained.
It can be affected by:
This flag is only relevant in native mode.
There are no BMS or BMC instructions that examine this flag.
See Also
Reference
- Eyes & Lichty, page 422, Table 18.2. 65x Flags.