Hi. In [write_eeprom](https://github.com/wagiminator/AVR-Programmer/blob/3228ccc1b9b1dca176e952b7cc8989b560f6647c/picoISP_Programmer/software/picostk/src/isp.c#L265) only 8 bit of an address is using, So correct writing/verifying of >256 bytes is impossible. UPD. Seems like [eeprom_read_page](https://github.com/wagiminator/AVR-Programmer/blob/3228ccc1b9b1dca176e952b7cc8989b560f6647c/picoISP_Programmer/software/picostk/src/isp.c#L315) is not correct too.