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Memory ②: Difference between revisions
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'''Memory | '''Memory ②''' is a region of the [[5A22]]'s address space. Memory ② is a total of 6 megabytes (exactly 6,291,456 bytes) in size, spread across: | ||
* the upper half (8000h - FFFFh) of banks 80h - BFh, which is exactly 2,097,152 bytes (2 megabytes spread across 64 banks), and | * the upper half (8000h - FFFFh) of banks 80h - BFh, which is exactly 2,097,152 bytes (2 megabytes spread across 64 banks), and | ||
* all of banks C0h - FFh, which is exactly 4,194,304 bytes (4 megabytes spread across 64 banks) | * all of banks C0h - FFh, which is exactly 4,194,304 bytes (4 megabytes spread across 64 banks) | ||
Thus, when labeled on a memory map, Memory | Thus, when labeled on a memory map, Memory ② forms a concave region; see Figure 2-21-1 of the official Super Nintendo development manual. | ||
=== See Also === | === See Also === | ||
Revision as of 22:28, 13 July 2023
Memory ② is a region of the 5A22's address space. Memory ② is a total of 6 megabytes (exactly 6,291,456 bytes) in size, spread across:
- the upper half (8000h - FFFFh) of banks 80h - BFh, which is exactly 2,097,152 bytes (2 megabytes spread across 64 banks), and
- all of banks C0h - FFh, which is exactly 4,194,304 bytes (4 megabytes spread across 64 banks)
Thus, when labeled on a memory map, Memory ② forms a concave region; see Figure 2-21-1 of the official Super Nintendo development manual.
See Also
References
- https://problemkaputt.de/fullsnes.htm#snesmemorycontrol
- bottom of page 2-21-2, the left-hand side of the figure: https://archive.org/details/SNESDevManual/book1/page/n93
- https://archive.org/details/SNESDevManual/book1/page/n143