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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 === | ||
* [[Memory ①]] | * [[Memory ①]] | ||
* [[RAM ①]] | |||
* [[RAM ②]] | |||
=== References === | === References === | ||
# https://problemkaputt.de/fullsnes.htm#snesmemorycontrol | |||
# bottom of [https://archive.org/details/SNESDevManual/book1/page/n93 page 2-21-2 of Book I], the left-hand side of the figure | |||
# [https://archive.org/details/SNESDevManual/book1/page/n143 page 2-28-5 of Book I] of the official Super Nintendo development manual | |||
[[Category:SNES Hardware]] | [[Category:SNES Hardware]] | ||
[[Category:Address Spaces]] | |||
Latest revision as of 03:38, 29 November 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 of Book I, the left-hand side of the figure
- page 2-28-5 of Book I of the official Super Nintendo development manual