====== DSFlash2 (DS Linker, N-Card et al.) programming ======

===== Flash chips =====

Known types:

- Hynix HY27UF081G2M
- Samsung K9G8G08U0M


===== Commands =====

TODO: Figure out card timings. (Are all of them stored in RAM?)

==== ??? (00 08 aa bb 00 00 00 00) ====

- ''aabb'' - ''000'' ~ ''7FE'', in increments of 2

==== ??? (66 00 00 00 00 00 00 00) ====

==== ??? (86 00 00 00 00 00 00 00) ====

==== ??? (87 08 aa bb ?? ?? ?? ??) ====

- ''aabb'' - ''000'' ~ ''7FF''

==== ??? (C1 ?? ?? 00 00 00 00 00) ====

==== NAND: Read other pins (C2 00 00 00 00 00 00 00) ====

Returns 4 bytes - repeated byte containing:

- bits 0-6: ?
- bit 7: READY/BUSY OUTPUT pin?

==== NAND: Read I/O pins 0-7 (D0 00 00 00 00 00 00 00) ====

Returns 4 bytes - repeated byte containing bits 0-7 on the I/O pins. Used for reading the status rgister.

==== NAND: Send command (D1 ?? ?? ?? ?? ?? ?? ??) ====

TODO

==== NAND: Read page (D2 aa bb cc dd 00 00 00) ====

- ''aabbccdd'': Address (MSB to LSB)

Returns 512 bytes.

==== NAND: Write page (D3 00 FF FF FF FF FF pp) ====

Expects 512 bytes.

- ''pp'': First byte of page (second byte onwards follow)