We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
Memory ②: Difference between revisions
From SnesLab
(sizes of each region) |
(added memory map link) |
||
| Line 2: | Line 2: | ||
* 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 2 forms a concave region; see the bottom of Figure 2-21-1 of the official Super Nintendo development manual. | |||
=== References === | === References === | ||
* https://problemkaputt.de/fullsnes.htm#snesmemorycontrol | * https://problemkaputt.de/fullsnes.htm#snesmemorycontrol | ||
* page 2-21-2: https://archive.org/details/SNESDevManual/book1/page/n93 | |||
[[Category:SNES Hardware]] | [[Category:SNES Hardware]] | ||
Revision as of 18:57, 4 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 the bottom of Figure 2-21-1 of the official Super Nintendo development manual.