WonderWitch/Flash
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The WonderWitch cartridge features a 512KiB flash chip - the MBM29DL400TC. While the WonderSwan SoC pervents writes to the ROM area, it can be written to via the SRAM area using port $CE on the Bandai 2003 mapper.
Sector layout
| Bank | Start | End | Size | Protected |
|---|---|---|---|---|
| 2 | $00000 | $0FFFF | 64 KB | No |
| $10000 | $1FFFF | 64 KB | ||
| $20000 | $2FFFF | 64 KB | ||
| $30000 | $3FFFF | 64 KB | ||
| $40000 | $4FFFF | 64 KB | ||
| $50000 | $5FFFF | 64 KB | ||
| 1 | $60000 | $63FFF | 16 KB | |
| $64000 | $6BFFF | 32 KB | ||
| $6C000 | $6DFFF | 8 KB | ||
| $6E000 | $6FFFF | 8 KB | ||
| $70000 | $71FFF | 8 KB | Yes | |
| $72000 | $73FFF | 8 KB | ||
| $74000 | $7BFFF | 32 KB | ||
| $7C000 | $7FFFF | 16 KB |
Note that the MBM29DL400TC allows operating simultaneously in two banks: the first 384 KB can be programmed or erased while the last 128 KB remains readable, and vice versa.
Commands
TODO
