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Hard Hat and Tandem.

To: linux@cthulhu.engr.sgi.com
Subject: Hard Hat and Tandem.
From: Cory Jon Hollingsworth <cory@real-time.com>
Date: Sun, 15 Aug 1999 13:54:24 -0500
Sender: owner-linux@cthulhu.engr.sgi.com
    I have a Tandem model number CMN B006S that I'm trying to get Hard
Hat up and running on.  This is a machine build for Tandem by SGI and,
based on the descriptions I have read, I believe it is a close cousin to
the Challenge S.

    For instance an hinv returns:
Syestem: IP22
Processor: 150 Mhz R4400, with FPU
Primary I-cache size: 16 Kbytes
Primary D-cache size: 16 Kbytes
Secondary cache size: 1024 Kbytes
Memory size: 256 Mbytes
SCSI Disk: scsi(0)disk(1)

When I try to boot off of the 2.1.100 kernel distributed with Hard Hat I
get this:

wd33c93-0: chip=WD33c93B/13 no_sync=0xff  no_dma=0scsi0 : SGI WD 93
scsi : 1 host.
 sending SDTR 0103013f0csync_xfer=2c  Vendor: SGI            Model:
SEAGATE ST31230N2
   Type:   Direct-Access                                           ANSI
SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 1, lun 0
scsi : detected 1 SCSI disk total.
SCSI device sda: hdwr sector= 512 bytes. Sectors= 2070235 [1010 MB] [1.0
GB]
sgiseeq.c: David S Miller (dm@engr.sgi.com)
eth0: SGI Seeq8003 08:00:69:08:db:dd
Sending BOOTP requests....Got a bus error IRQ, shouldn't happen yet
$0 : 00000000 88190000 97f8bd68 fffffff5
$4 : 97f8db84 00000000 00000000 00000040
$8 : 0000001c 881095b4 00000001 00000000
$12: 00000000 97f8476c 97f84600 a8617000
$16: 00000040 97f43f78 00000000 97f8bdb0
$20: 0000016c 9fc56934 00000000 9fc56394
$24: 00000000 97f8bce8
$28: 97f8a000 97f8bd50 9fc4be88 880923cc
epc     : 880923cc
Status: 1004fc03
Cause : 00004000
Spinning...

     Now I have spent a some time browsing the archives and I know this
was a common problem some time ago on certain models of Indys.

    I can get the system to boot by replacing the Hard Hat vmlinux image
with the vmlinux-indy-initrd-990313.gz image found in
ftp.linux.sgi.com/pub/linux/mips/test.  But that leaves me with a
crippled RAM disk image and a root prompt.  I can NFS mount my Hard Hat
file system, but that doesn't help me run the installation.

    My question is: Can I get a precompiled vmlinux replacement for the
Hard Hat distribution which will allow me to continue with the
installation?   Or, since Tandem is not officially supported,  do I
spend the next couple of months hand assembling a root partition on the
machine from the bits I currently have working via NFS?

    Any advice anyone could give me would be greatly appreciated.

    Thanks.

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