lkml.org 
[lkml]   [1998]   [Nov]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: The history of the Linux OS
On Nov 26, Daniel Engstrom wrote:

> On 25 Nov, Alex Buell wrote:
> > Ah yeah, the infamous COM4 bug with S3 chipsets.
> Actually it had precedence: some IBM video board (8514/A??) used that
> very address first.
>
> > Seems some fuckwit used the usual COM4 I/O port as one of its I/O
> > registers.
> It wasn't the COM4 address but something like 0xBE8 with the low 10 bits
> identical to 0x3E8, which is the COM4 base port. You'll need an
> el-cheapo serial board with 10-bit address decode only to be bitten by
> this.

please don't add confusion with wrong numbers:

IBM8514/A (and thus S3/ATI) uses 0x[4-b][26ae]e8 addresses which all will give
0x2E8 when cut off to 10 bits resulting in collision with COM4 !
0x3E8 is COM3...

> > Ahh, that particular chipset designer should have been taken out and made to use Microsoft
> > products in eternity (with a Windows 95 Beta!).
> Or the engineer at IBM who decided that only decoding the low 10 bits
> for i/o port accesses was enough for all future.

yep:(
or maybe it's the account manager who decided that there is no more money
for additional 6+ NAND inputs and thus one more chip on the board ?!


Harald
--
All SCSI disks will from now on ___ _____
be required to send an email notice 0--,| /OOOOOOO\
24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\
\ \/OOOOOOOOOOOOOOO\
\ OOOOOOOOOOOOOOOOO|//
Harald Koenig, \/\/\/\/\/\/\/\/\/
Inst.f.Theoret.Astrophysik // / \\ \
koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^
-
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 13:45    [from the cache]
©2003-2011 Jasper Spaans