====== persist.h ======

Functions for saving data to the cartridge flash at runtime.

===== Functions =====
==== clear_save_sector() ====
<code C>
void clear_save_sector();
</code>
The flash memory sector to be written must be cleared first to all 0xFF bytes, as the write operation can only change 1 bits to 0 bits.

==== save_write====
<code C>
void save_write(void *src, void *dest, char len);
</code>
Copy ''len'' bytes from ''src'' (must be in RAM) ''dest'' (must be in ROM "SAVE" sector)