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KBD Queries
Posted: Sun Dec 07, 2003 12:57 pm
by rahman
in my keyboard driver, when i move edh to the port 64h, i receive the error message in bochs as:
unsupported io write to 64h value=ed
what will be the problem?
Re:KBD Queries
Posted: Sun Dec 07, 2003 1:22 pm
by BI lazy
you want to play with kbd leds, don't you?
port 64h is the kbd status port, from which you fetch status information.- like: input buffer ready/output buffer ready.
a command like 0xed (modify led), you write to port 0x60, just followed by the value describing which leds to torn on/off .
everything clear now?
Re:KBD Queries
Posted: Sun Dec 07, 2003 1:29 pm
by rahman
thanx a lot
Re:KBD Queries
Posted: Sun Dec 07, 2003 3:08 pm
by Therx
error message in bochs
I guess that bochs doesn't support this port yet. Lets face it its hardly a key functionality thing. You could use #ifdef's so you can compile a bochs version but I've given up on bochs if it works on a real PC I'm happy
Re:KBD Queries
Posted: Mon Dec 08, 2003 5:27 am
by BI lazy
Bochs supports this kind of operatiion, Pete. I use it all the time and it works pretty fine as long as i dont' exceed the length of data which can bew written to that port.
Yeah, and this led thing now works for quite a year pretty fine.
stay safe.