Leaky nicad battery

From: Clint Wolff <clintw_at_colorado.cirrus.com>
Date: Fri Apr 30 15:09:48 1999

>
> >
> > Cleaning the board didn't solve the problem that this PC has. On power on, it
> > says (something like) 2A Keyboard failure. I can boot the machine and get into
> > the setup menu by pressing Alt-Esc. However, the cursor keys and space bar do
> > not work. At the DOS prompt, typing letter keys causes them to print twice
> > (ddiirr, and so on). This is using a known good keyboard to test with.
> >
> > Does anyone have an idea as to what the problem might be? If it's in some
> > custom-programmed keyboard controller or other custom chip, obviously the
>

A "standard" PC keyboard outputs two messages for each key. One for the
key-down, and a second for the key-up. The key-up code is the same as the
key-down code with 0xF0 in front of it. This could be the cause of the
double letters.

clint
Received on Fri Apr 30 1999 - 15:09:48 BST