Z80 memory map
From NeoGeo Development Wiki
Cartridge systems
The 
NEO-ZMC chip in cartridges allows ROM bankswitching.
| Start | End | Size | Description |
| $0000 | $7FFF | 32KiB | Static main code bank (start of the M1 ROM) |
| $8000 | $BFFF | 16KiB | Switchable bank 3 |
| $C000 | $DFFF | 8KiB | Switchable bank 2 |
| $E000 | $EFFF | 4KiB | Switchable bank 1 |
| $F000 | $F7FF | 2KiB | Switchable bank 0 |
| $F800 | $FFFF | 2KiB | Work RAM |
CD systems
CD systems only have 64KiB of RAM dedicated to the Z80.
It seems that NEO-SUD allows loading Z80 files accross the whole range, and locks $0000~$F7FF as read-only to simulate ROM during execution.
