Unofficial Name: WriteAByteSafe
BCALL Address: 80C6
Writes a byte to FlashROM, but will refuse to write to page 1Eh/3Eh/7Eh.
- A = Flash page to write
- DE = address to write
- B = byte to write
- NZ if the byte could not be written
- AF, DE, BC, HL
Flash must be write enabled first.
Note that you cannot use this to write a 1 bit over a 0, nor can you write to the certificate page (1Eh/3Eh/7Eh).