🚀 go-pugleaf

In article <1992Sep27.230227.19249@wam.umd.edu> castanos@wam.umd.edu (Jose Alberto Castanos) writes:
>From: castanos@wam.umd.edu (Jose Alberto Castanos)
>Subject: Port for keyboard indicator lights needed
>Keywords: AT keyboard indicator lights LEDs
>Date: 27 Sep 92 23:02:27 GMT
>
>
>Hello,
>
>  I need to know which port to write to in order to get the keyboard
>indicator lights to go on and off.  I've looked in several books, but 
>the closest I've gotten is a vague reference to port 66h (?).  Some
>books that would be likely candidates to have this information are
>out of the library :-(.
>
>  Also, is the port the same for all IBMs after the AT (the first in the
>family to have the indicators).  Thanks in advance!
>
>
>-------------------------------------------------------------------------------
>Jose A. Castanos       | Computer Science Dept. |"If a person never contradicts
>(castanos@wam.umd.edu) | University of Maryland | himself, it must be that he 
>                       | College Park, MD       | says nothing." -M. de Unamuno
>-------------------------------------------------------------------------------

The keyboard indicator lights can be controlled by setting and resetting
bits in some byte in the bios-data-area (or whatever it's called). You'll
find it in Ralph's Interrupt listing. The BIOS updates the lights 
automaticly. For programming the keyboard directly, look in the HELPPC21
file (garbo and simtel).