Memory ②: Difference between revisions

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.

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-'''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:
+'''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, 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
+* 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 ===
+* [[Memory ①]]
+* [[RAM ①]]
+* [[RAM ②]]
 === References ===
-* https://problemkaputt.de/fullsnes.htm#snesmemorycontrol
+# 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:Address Spaces]]