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Reading up on NES ROM programming.

For some reason, memory addresses 0x0000-0x07ff are mirrored three times (for a total of four identical regions of memory). In a system with such a small amount of addressable memory, why would anyone do that??

in reply to Jonathan Lamothe

Matthew Skala
Matthew Skala
• •
Cheaper not to hook up a couple of the address lines; and unused addressing space is free if you aren't planning to use it anyway.

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