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CPU Data Bus: Difference between revisions

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(mention this is connected to same set of components as SNES bus)
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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 is denoted CD0~7 in Figure 2-22-1 "Super NES Functional Block Diagram." <sup>[1]</sup>  It is connected to:
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." <sup>[1]</sup>  It is connected to:


* [[S-CPU]]
* [[S-CPU]] pins 60 to 67
* [[WRAM]]
* [[WRAM]] pins 2-5 and 60-63
* [[S-SMP]]
* [[S-SMP]] pins 38-45
* [[Cartridge Slot]]
* [[Cartridge Slot]] pins 19-22 and 50-53
* [[PPU1]]
* [[PPU1]] pins 14-21
* [[PPU2]]
* [[PPU2]] pins 8-15
* [[Expansion Port]]
* [[Expansion Port]] pins 11 to 18


which are the exact same set of components that the [[SNES bus]] is connected to.
which are the exact same set of components that the [[SNES bus]] is connected to.
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=== External Links ===
=== External Links ===
# [https://archive.org/details/SNESDevManual/book1/page/n98 page 2-22-2] of the official Super Nintendo development manual
# Figure 2-22-1 Super NES Functional Block Diagram on [https://archive.org/details/SNESDevManual/book1/page/n98 page 2-22-2 of Book I] of the official Super Nintendo development manual


[[Category:Traces]]
[[Category:Traces]]
[[Category:SNES Hardware]]
[[Category:SNES Hardware]]
[[Category:Buses]]
[[Category:Buses]]

Latest revision as of 20:03, 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:

which are the exact same set of components that the SNES bus is connected to.

See Also

External Links

  1. Figure 2-22-1 Super NES Functional Block Diagram on page 2-22-2 of Book I of the official Super Nintendo development manual