TRM H8294018-0 Y202990006 1 General 2 Principle of operation 3 Interface operation 4 System expansion A Appendix TRMF 1 General 2 Input from keyboard 3 Liquid chrystal display (LCD) 4 Serial communication 5 RS-232C communication 6 Micro-cassette and external cassette 7 Microprinter 8 ROM cartridge 9 Load module 10 Floppy-disk unit 11 Slave MCU commands 12 Bar-code reader 13 Miscellaneous I/O-routines 14 Memory map 15 Virtual screen 16 Menu 17 Monitor 18 Interfacing with BASIC A1 LCD controller/driver uPD7227G A2 HD146818RTC (Real time clock) A3 HD6301V MCU (Microcontroller Unit) A4 Mnemonic codes A5 Instruction codes