Eventually I would like to sell full kit of "super tinyBASIC computer" contains
(2) Arduino bootloader written ATMega1284P
(3) RTC (PCF2129AT)
(4) two-byte character (Kanji) SPI ROM
(5) Piezo buzzer
(6) All of connectors and capacitors/resistors
All you will need to complete is this kit and (USB-TTL interface (FTDI): not included) . Stay tune!