Subject: port-i386/483: Keyboard probe bug with Pcvt console driver and AnyKey keyboard
To: None <email@example.com>
From: Brian Moore <firstname.lastname@example.org>
Date: 09/18/1994 00:05:07
>Synopsis: Keyboard probe bug with Pcvt console driver and AnyKey keyboard
>Responsible: gnats-admin (GNATS administrator)
>Arrival-Date: Sun Sep 18 00:05:04 1994
>Originator: Brian Moore
"My humble little abode"
System: NetBSD munch.eecs.umich.edu 1.0_BETA NetBSD 1.0_BETA (MUNCH) #0: Sun Sep 18 01:38:36 EDT 1994 email@example.com:/usr/src/sys/arch/i386/compile/MUNCH i386
The pcvt console driver has the old keyboard probe bug for Gateway 2000
AnyKey keyboards that was fixed with pccons console driver. Basically
what would happen is, during boot, the keyboard would fail to be probed
and you would be unable to type anything. The only recourse was,
during the kernel probe stage, hitting the keys on the keyboard like
mad. This would allow the keyboard to be probed and everything would
workfine after that.
Get one of those wacked out Gateway 2k's with the AnyKey keyboards,
compile pcvt into your kernel and then reboot. When the login screen
comes up you won't be able to type anything.
I've already sent Hellmuth this patch. There just needs to be a delay
added between a read of the status port on the 8042 and a read of the
data port on the 8042.
--- pcvt_kbd.c.orig Tue Sep 13 18:37:26 1994
+++ pcvt_kbd.c Sun Sep 18 01:09:11 1994
@@ -539,6 +539,8 @@
while (!(inb(CONTROLLER_CTRL) & STATUS_OUTPBF))
if (--timeo == 0)
+ delay(6); /* ziff */
return ((u_char) inb(CONTROLLER_DATA));