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VRAM Data Bus: Difference between revisions
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Revision as of 01:40, 5 May 2023
The Blue Bus, as it appears in the colorized jwdonal schematic, is the data bus that connects S-PPU1 to the VRAM chips. It consists of two 8-bit data buses VDA and VDB. VDA0-VDA7 connects to the VRAM chip which has VAA going to it, and VDB0-VDB7 connects to the VRAM chip which has VDB going to it.