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Accumulator: Difference between revisions
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=== Reference === | === Reference === | ||
* [[Eyes & Lichty]] page 27, https://archive.org/details/0893037893ProgrammingThe65816/page/n53 | * [[Eyes & Lichty]] page 27, https://archive.org/details/0893037893ProgrammingThe65816/page/n53 | ||
* https://archive.org/details/SNESDevManual/book1/page/n182 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
Revision as of 06:25, 20 December 2023
An Accumulator is a very fast register inside a processor that acts as a mathematical scratch pad.
The 65c816's accumulator can be either 8 or 16 bits in size, as configured by the M flag. Labiak calls this 16-bit memory mode.
The high byte ("B") is still retained even when the accumulator is 8 bits wide.
The S-SMP's accumulator is always 8 bits wide.