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Raffzahn
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[Please see answers to this related question as well]

The NES Picture Processing Unit has eight memory-mapped registers to the CPU in registers $2000 to $2007. The are incompletely decoded, so they are mirrored every 8 bytes from register $2008 to $3FFF.

What does it mean that the memory is "incompletely decoded?" What is the purpose of nametable mirroring in the PPU?

The NES Picture Processing Unit has eight memory-mapped registers to the CPU in registers $2000 to $2007. The are incompletely decoded, so they are mirrored every 8 bytes from register $2008 to $3FFF.

What does it mean that the memory is "incompletely decoded?" What is the purpose of nametable mirroring in the PPU?

[Please see answers to this related question as well]

The NES Picture Processing Unit has eight memory-mapped registers to the CPU in registers $2000 to $2007. The are incompletely decoded, so they are mirrored every 8 bytes from register $2008 to $3FFF.

What does it mean that the memory is "incompletely decoded?" What is the purpose of nametable mirroring in the PPU?

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JAL
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Why are the PPU registers on the NES mirrored?

The NES Picture Processing Unit has eight memory-mapped registers to the CPU in registers $2000 to $2007. The are incompletely decoded, so they are mirrored every 8 bytes from register $2008 to $3FFF.

What does it mean that the memory is "incompletely decoded?" What is the purpose of nametable mirroring in the PPU?