[comp.sys.ibm.pc] PS/2 keyboard lights -- how do they work?

chip@tct.uucp (Chip Salzenberg) (05/09/90)

Some time ago, I asked for information on manipulating the keyboard
lights of the PC AT and PS/2.

I got info on the PC AT.   I didn't get info on the PS/2.

Those of you out there who know how the PS/2 hardware works: HELP!
I've got a communications program with a custom handler for interrupt
nine, and I'm handling CapsLock and NumLock, but the lights are wrong.

(BTW:  I know about the byte at location 40:17.  That doesn't work
when you write your own handler for interrupt nine.  I need to know
how to talk to the keyboard lights themselves.)

I'll summarize all AT and PS/2 replies to the net.
-- 
Chip Salzenberg at ComDev/TCT   <chip%tct@ateng.com>, <uunet!ateng!tct!chip>