lkml.org 
[lkml]   [1999]   [Sep]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Designing a keyboard controller
On Tue, Sep 14, 1999 at 09:41:01AM +0200, J.D. Bakker wrote:

> That looks like a good solution. The question remains then: what does an
> 8042 'look like', as seen from Linux ? I want to mimic the ISA side of a
> regular keyboard controller (without actually cramming a 40pin DIL chip on
> my 7.5x10cm PCB :-P). Does anyone have pointers to documents on this ?

If you really want to present an i8042 interface to Linux (as crappy as it is),
I think the VIA VT82C42 could work, since it's also available in SMD packaging.

> A semi-related question: is it possible for multiple different devices on
> an ISA-ish bus to share an interrupt *on the processor side* ? For example,
> say I have a custom PIC which multiplexes (logic OR) the interrupt output
> of a keyboard controller with the interrupt output of an IDE controller
> onto one interrupt line for the processor. Does this work, or do I break
> any hidden assumptions in either the keyboard or the IDE driver ?

As far as I know, there isn't any problem with the keyboard driver. Don't
know about the IDE driver, though.

Vojtech

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:53    [W:0.056 / U:0.084 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site