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Address Bus A: Difference between revisions

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(bank switching)
(pin 5 of cartridge slot is GND)
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* [[S-CPU]] pins 2-17 and 93-100
* [[S-CPU]] pins 2-17 and 93-100
* [[WRAM]] pins 23-42
* [[WRAM]] pins 23-42
* [[Cartridge Slot]] pins 5-17 and 37-48
* [[Cartridge Slot]] pins 6-17 and 37-48


It is 24 bits wide because that is how big the SNES' address space is.  It can address up to 16 megabytes, which is enough for most games, but some games use bank switching to address even more.
It is 24 bits wide because that is how big the SNES' address space is.  It can address up to 16 megabytes, which is enough for most games, but some games use bank switching to address even more.

Revision as of 19:36, 18 August 2024

Address Bus A is a 24-bit bus on the SNES. It is drawn in orange in the colorized jwdonal schematic, and its individual address lines are labeled CA0-CA23.

It is connected to:

It is 24 bits wide because that is how big the SNES' address space is. It can address up to 16 megabytes, which is enough for most games, but some games use bank switching to address even more.

Bus A.png

See Also

Reference

  1. Figure 2-22-1, "Super NES Functional Block Diagram" on page 2-22-2 of Book I