OSWORD &FC
OSWORD &FC (252) DOS CRTC Control
This OSWORD call is installed by the 80x86 DOS BIOS.
Commands are sent from the 80x86 via Tube Register 2 within the OSWORD protocol, so cannot be called through the normal OSWORD mechanism. The transaction must be done manually by the client by sending through Tube Register 2:
&08 : Start OSWORD transaction &FD : OSWORD call &FD &00 : TxLen=0 xxx : Send a series of commands &00 : RxLen=0, terminate the OSWORD call
Commands
- b7=0 : program CRTC, command specifies register, next byte sent is the CRTC data
- &FC : write to mouse port (unimplemented)
- &FD : initialise event handler
- &FE : initialise mouse driver
- &FF : finish. All other commands also finish the transaction.
See also
- OSWORD &FA
- OSWORD &FB
- OSWORD &FD
- OSWORD &FE
- OSWORD &FF
- OSWORD &FC source code
- OSWORDs list at mdfs.net
Jgharston 14:28, 26 May 2009 (UTC) Jgharston (talk) 10:55, 17 December 2024 (CET)
