Appendix A 478 Teletext (MODE 7) displayed alphanumeric characters Appendix B 480 Teletext (MODE 7) displayed graphic characters Appendix C 482 ASCII (MODES 0 to 6) displayed character set and control codes Appendix D 484 Hexadecimal ASCII codes Appendix E 485 Text and graphics planning sheets Appendix F 489 Keyboard codes Appendix G 490 Printed circuit board layout for the BBC Microcomputer Appendix H 491 External connections at the rear of the BBC Microcomputer Appendix I 492 External connections underneath the BBC Microcomputer Appendix J 493 Memory map amd memory map assignments Appendix K 496 Circuit layouts Appendix L 501 VDU code summary Appendix M 502 6502 instruction set