OSBYTE &CA

OSBYTE &CA (202) - Read/Write Keyboard Status

   This byte determines the current state of the LOCK keys
   b0=reserved
   b1=reserved
   b2=reserved
   b3=0=shift not pressed
   b4=0=caps lock on
   b5=0=shift lock on
   b6=0=control not pressed
   b7=0=shift enable
   Note With caps lock on and shift enable off, shift has no effect on the 
        letters.
   (Electron OS)
   b4=0=caps lock on
   b5=0=FN key not pressed
   b6=0=shift not pressed
   b7=0=control not pressed
   (RISC OS 1.00)
   b1=0=scroll lock off
   b2=0=num lock on
   b5=reserved

See Also

• http://mdfs.net/Docs/Comp/BBC/OsbyteA6

Jgharston 22:48, 26 May 2009 (UTC)