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Appendix 4: ASCII and Control Codes

All 128 ASCII codes are available from the Atom, but only 127 direct from the keyboard. The "back arrow" (#5F) can only be obtained from programs.

DECIMAL HEX <CTRL>
+ KEY
NAME ATOM ACTION
2 2 B STX START PRINTER
3 3 C ETX END PRINTER
6 6 F ACK START VDU
7 7 G BEL BEEP SPEAKER
8 8 H BS BACKSPACE NO ERASE
9 9 I HT FORWARD SPACE
10 A J LF LINE FEED
11 B K VT UP ONE LINE
12 C L FF CLEAR VDU + HOME UP
13 D M CR CARRIAGE RETURN
14 E N SO PAGE MODE ON
15 F O SI PAGE MODE OFF
21 15 J NAK SCREEN OFF
24 18 X CAN ERASE CURRENT LINE
27 1B [ ESC ESCAPE FROM BASIC
Hit twice, set VDU to character mode
30 1E   RS HOME UP LEFT

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