home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.os.linux
- Path: sparky!uunet!unislc!erc
- From: erc@unislc.uucp (Ed Carp)
- Subject: Re: keyboard problems - v.99
- X-Newsreader: TIN [version 1.1 PL6]
- References: <1992Dec17.155617.1581@saifr00.cfsat.honeywell.com>
- Message-ID: <1992Dec17.195705.10601@unislc.uucp>
- Organization: Unisys Corporation SLC
- Date: Thu, 17 Dec 1992 19:57:05 GMT
- Lines: 17
-
- Dean Troyer (troyer@saifr00.cfsat.honeywell.com) wrote:
-
- : Port 61 is listed in my BIOS reference as being the PS/2 System Port B, although
- : it's not unique to PS/2s. It's uses include the speaker hardware & timer
- : control bits. Check out the Mach sources kd.h. The bummer is that I can't
- : find the purpose of bit 7 documented anywhere! I suspect it controls one
- : of the keyboard controller's input pins.
-
- Bit 7: input - 1=IRQ 0 reset (timer 0 output latch)
- output- Parity check state (1=parity check occurred)
-
- This is from "The Programmer's PC Sourcebook" by Thom Hogan. An absolute
- *must* if you're going to be mucking about with the hardware. :)
- --
- Ed Carp erc@apple.com, erc@saturn.upl.com 801/538-0177
-
- Who and what would you be if you went beyond your deepest fears?
-