Date: Thu, 10 Apr 97 10:23:08 -0600 From: kta@alien.ru (Tatiana Kichkaylo) To: hackers@freebsd.org Subject: Solved problem with com ports & Mach64. Message-ID: <199704100450.LAA23340@robin.alien.ru>
next in thread | raw e-mail | index | archive | help
Hi!
It's 1997 now, and I think I'm not the first with this problem, but...
>Environment:
Release: FreeBSD 2.1-STABLE i386 from Walnut Creec CDROM, Jan 1996
Intel motherboard with chipset Triton rev 2 and on-board video Mach64.
Only com1 & com2 present. Address space of com3 & com4 is used by video
card.
>Description:
In boot time, when a kernel probes sio, monitor falls into green mode.
Reason: in /usr/src/sys/i386/isa/sio.c in function sioprobe kernel writes
into all likely_com_ports, while some of them are video ports now.
>How-To-Repeat:
Boot from any kernel with any sio turned on. With all of com ports turned
off booting is Ok.
>Fix:
With /usr/src/sys/i386/isa/sio.c
341a342
> #if NSIO>2
342a344,346
> #else
> static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, };
> #endif
I've just decreased the length of this array for sioprobe
(and other functions) never writes to my video ports.
--
-----------------------------------------------------------
kta@alien.ru (Tatiana Kichkaylo)
-----------------------------------------------------------
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199704100450.LAA23340>