OSBYTE &E0

OSBYTE &E0 (224): Character &F0-&FF interpretation

OSBYTEs 221 to 228 control the interpretation of characters &80-&FF when read from the keyboard buffer, or the serial input buffer when character interpretation is enabled.

OSBYTE	Characters	Modifier	Keys	Default	Effect	Electron notes
OSBYTE 225	&80-&8F	-	function keys 0-9, cursor keys	&01	soft key	default=&01, FUNC+numbers, cursor keys
OSBYTE 226	&90-&9F	SHIFT	function keys 0-9, cursor keys	&80	&80-&8F	default=&01, FUNC+A - FUNC+P
OSBYTE 227	&A0-&AF	CTRL	function keys 0-9, cursor keys	&90	&90-&9F	default=&01, FUNC+Q - FUNC+Z, FUNC with : ; , - . /
OSBYTE 228	&B0-&BF	SHIFT+CTRL	function keys 0-9, cursor keys	&00	ignore
OSBYTE 221	&C0-&CF	-	function keys 10,11,12, Insert	&01	soft key
OSBYTE 222	&D0-&DF	SHIFT	function keys 10,11,12, Insert	&D0	&D0-&DF
OSBYTE 223	&E0-&EF	CTRL	function keys 10,11,12, Insert	&E0	&E0-&EF
OSBYTE 224	&F0-&FF	SHIFT+CTRL	function keys 10,11,12, Insert	&F0	&F0-&FF

Break inserts &CA into the keyboard buffer. On some systems, Alt+key is treated as a SHIFT+CTRL modifer. Note that SHIFT+CTRL also has the function of pausing screen scrolling, so entering SHIFT+CTRL+key interactively may pause scrolling.

The interpretation values are:

• 0 - ignore the character
• 1 - expand as soft key or Electron shortcut key for &90-&AF
• 2 - return &00,character (MOS 3.50, MOS 5 and later)
• otherwise, use as a base value and add to (character AND 15)

See Also

• OSBYTE &04
• http://mdfs.net/Docs/Comp/KeyMap/BBC
• http://mdfs.net/Docs/Comp/KeyMap/Electron
• http://mdfs.net/Docs/Comp/KeyMap/RISCOS

Jgharston 23:03, 26 May 2009 (UTC) Jgharston (talk) 04:40, 20 July 2020 (CEST)