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| Start | End | Description |
|---|---|---|
| 0x000000 | 0x0027FF | RAM |
| 0x002800 | 0x002FFF | PPU |
| 0x003000 | 0x0037FF | Sound |
| 0x003D00 | 0x003DFF | IO |
| 0x003e00 | 0x003E03 | DMA |
External memory starts at 0x4000. It can be mapped to the internal ROM and the two possible chips in the cartridges.
Document how to manipulate the banking (using GPIOs?)
