Oops [486 SX 25]

[Jon Masters]

Hi,
        I've been trying to setup an old 486 as a
mailserver/firewall/etc. for
this house however there is a problem. The first machine that I tried
had a problem with the memory and so it caused sig 11s/sig 7s. I swapped
that machine for an other machine and, after I added another 4mb 72 pin
fp simm today to it's existing 4mb, it had enough memory to run the
installer from several of the mainstream distros.

I tried several distro install disc, however the kernel used by each one
just causes a mess.

I also tried an old slackware '96 installation boot/root disk (kernel
2.0.0 - I think)  and, after it started uncompressing the image on the
root disc it said:

Unknown Interrupt.

Here is some of the output from the rh6.1 install disk (one of the 2.2.x
kernels - I forget which one). Note that the machine was absolutely dead
(no magic keys, sysrq, etc.) and that I had to hand-transcribe this
output. I couldn't get all of the display because it scrolled and I may
have made mistakes so if it doesn't make sense it's probably because I
was trying to read this from a very very bad old monitor/etc.

Here's the screen output that I got:

       00000000 c017ae5d c027e008 c0099008 00000009 00000006 00000005
00000016
Call Trace: [<c017a5dc>] [<c017ae5d>] [<c017af5e>] [<c017afcd>]
[<c017b372>] [<c0106000>] [<c010615f>]
       [<c01065d7>]
Code: <1>Unable to handle kernel NULL pointer dereference at virtual
address 00000000
current->tss.cr3 = 00101000, %cr3 = 00101000
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c0107e97>]
EFLAGS: 00010082
eax: 00000000   ebx: 00000000   ecx: 00000001   edx: 00000001
esi: 00098800   edi: c0264000   ebp: c1000000   esp: c0263534
ds: 0018   es: 0018   ss: 0018
Process swapper (pid: 1, process nr: 1, stackpage=c0263000)
Stack: c0262000 c027e260 00000082 00800000 c1800000 c0107ef5 c0263594
c01c7858
       c01c8dae 00000000 00000000 c010d173 c01c8dae c0263594 00000000
c0262000
       00008000 c0235100 c027e260 c023c0e0 00000009 c0107b8d c0263594
00000000
Call Trace: [<c1800000>] [<c0107ef5>] [<c01c7858>] [<c01c8dae>]
[<c010d173>] [<c01c8dae>] [<c0107b8d>]
        [<c017a5dc>] [<c017ae5d>] [<c017af5e>] [<c017afcd>] [<c017b372>]
[<c0106000>] [<c010615f>] [<c01065d7>]
Code: 0f b6 0c 03 89 4c 24 14 51 68 50 78 1c c0 e8 1e a2 00 00 83

Can someone help as I don't want to have to throw this machine away.

P.S. It used to have windows on it before I got it and it will load that
successfully (win95) - I realise that Linux is more demanding, however,
I think the underlying hardware is functioning properly.

Jonathan. 

--
Jonathan C. Masters
jonathan en easypenguin.co.uk

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