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V9990

274 bytes added, 14:44, 14 October 2018
- Register 27 (PRIORITY CONTROL): Mask is &FF
* VRAM read/write via registers, 0,1,2 and 3,4,5 and port 0 use *logical* addresses and not physical addresses. Writing in one mode, and then reading back in another can yield different data because the addresses are translated from physical to logical based on the mode.
[[Category:Hardware]]
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