Difference between revisions of "OSBYTE &CA"
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This byte determines the current state of the keyboard modifier keys | This byte determines the current state of the keyboard modifier keys | ||
| − | b0 = BBC/Electron: reserved | + | b0 = BBC/Electron: reserved Compact: b0-b2 = EXTEND status RISC OS: Alt pressed |
| − | b1 = BBC/Electron: reserved | + | b1 = BBC/Electron: reserved 1=EXTEND, 2=Shift-EXTEND RISC OS: Scroll Lock set |
| − | b2 = BBC/Electron: reserved | + | b2 = BBC/Electron: reserved 3=Ctrl-EXTEND, 4=Sh-Ct-EXTEND RISC OS: Num Lock set |
b3 = Shift pressed | b3 = Shift pressed | ||
b4 = Caps lock off | b4 = Caps lock off | ||
b5 = Shift lock off | b5 = Shift lock off | ||
(ie, b5-4=01: Shift Lock on, 10: Caps Lock on, 11: No lock) | (ie, b5-4=01: Shift Lock on, 10: Caps Lock on, 11: No lock) | ||
| − | b6 = | + | b6 = BBC/RISC OS: Control pressed Electron: FN pressed |
b7 = Shift enable (Shift Caps or Shift Inverse) | b7 = Shift enable (Shift Caps or Shift Inverse) | ||
Revision as of 15:36, 25 March 2018
OSBYTE &CA (202) - Read/Write Keyboard Status
This byte determines the current state of the keyboard modifier keys
b0 = BBC/Electron: reserved Compact: b0-b2 = EXTEND status RISC OS: Alt pressed
b1 = BBC/Electron: reserved 1=EXTEND, 2=Shift-EXTEND RISC OS: Scroll Lock set
b2 = BBC/Electron: reserved 3=Ctrl-EXTEND, 4=Sh-Ct-EXTEND RISC OS: Num Lock set
b3 = Shift pressed
b4 = Caps lock off
b5 = Shift lock off
(ie, b5-4=01: Shift Lock on, 10: Caps Lock on, 11: No lock)
b6 = BBC/RISC OS: Control pressed Electron: FN pressed
b7 = Shift enable (Shift Caps or Shift Inverse)
With Caps Lock on and Shift Enable off, Shift has no effect on letter keys.
Examples
- *FX 202,16 turns Shift Lock on
- *FX 202,32 turns Caps Lock on
- *FX 202,48 turns Caps Lock/Shift Lock off
- *FX 202,160 turns Shift Caps on
Jgharston 22:48, 26 May 2009 (UTC)
Jgharston (talk) 20:18, 13 June 2016 (UTC)
