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Instruction Register: Difference between revisions
From SnesLab
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=== References === | === References === | ||
* Labiak, https://archive.org/details/Programming_the_65816/page/n49 | * Labiak page 39, https://archive.org/details/Programming_the_65816/page/n49 | ||
* section 2.1 on page 6 of 65c816 datasheet, https://westerndesigncenter.com/wdc/documentation/w65c816s.pdf | * section 2.1 on page 6 of 65c816 datasheet, https://westerndesigncenter.com/wdc/documentation/w65c816s.pdf | ||
[[Category:SNES Hardware]] | [[Category:SNES Hardware]] | ||
[[Category:Registers]] | [[Category:Registers]] | ||
Revision as of 02:04, 29 June 2024
The Instruction Register (IR) exists on the 65c816. It is 8 bits wide and contains the opcode just fetched from memory. It is not accessible to the programmer.
References
- Labiak page 39, https://archive.org/details/Programming_the_65816/page/n49
- section 2.1 on page 6 of 65c816 datasheet, https://westerndesigncenter.com/wdc/documentation/w65c816s.pdf