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CPU Data Bus: Difference between revisions
From SnesLab
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* [[S-SMP]] | * [[S-SMP]] | ||
* [[Cartridge Slot]] pins 19-22 and 50-53 | * [[Cartridge Slot]] pins 19-22 and 50-53 | ||
* [[PPU1]] | * [[PPU1]] pins 14-21 | ||
* [[PPU2]] | * [[PPU2]] | ||
* [[Expansion Port]] pins 11 to 18 | * [[Expansion Port]] pins 11 to 18 | ||
Revision as of 19:58, 18 August 2024
The CPU Data Bus, (drawn in brown in the colorized jwdonal schematic), is the 8-bit data bus that moves data around during a DMA. It also how memory is accessed with commands like LDA and STA. It is denoted CD0~7 in Figure 2-22-1 "Super NES Functional Block Diagram." [1] It is connected to:
- S-CPU pins 60 to 67
- WRAM
- S-SMP
- Cartridge Slot pins 19-22 and 50-53
- PPU1 pins 14-21
- PPU2
- Expansion Port pins 11 to 18
which are the exact same set of components that the SNES bus is connected to.
See Also
External Links
- Figure 2-22-1 Super NES Functional Block Diagram on page 2-22-2 of Book I of the official Super Nintendo development manual