It boots and runs!!!!
I've spent most of today installing (through trial and error) Hard
Hat on the the Tandem. And It looks like I have been successful!
Check it out:
[root@Terminus /proc]# cat cpuinfo
cpu : MIPS
cpu model : R4000SC V5.0
system type : SGI Indy
BogoMIPS : 74.96
byteorder : big endian
unaligned accesses : 0
wait instruction : no
microsecond timers : no
extra interrupt vector : no
hardware watchpoint : yes
VCED exceptions : 10718
VCEI exceptions : 31543
[root@Terminus /proc]# dmesg |head
PROMLIB: SGI ARCS firmware Version 1 Revision 10
PROMLIB: Total free ram 265719808 bytes (259492K,253MB)
CPU: MIPS-R4400 FPU<MIPS-R4400FPC> ICACHE DCACHE SCACHE
Loading R4000 MMU routines.
CPU revision is: 00000450
Primary instruction cache 16kb, linesize 16 bytes)
Primary data cache 16kb, linesize 16 bytes)
Secondary cache sized at 1024K linesize 128
Linux version 2.2.1 (email@example.com) (gcc version 18.104.22.168)
#519 Mon Mar 29 01:24:17 MEST 1999
The installation process certainly wasn't what I would call smooth,
but it was worth it.
Thanks to everyone who provided me hints on identifying this
machine. I have never had access to an Indy/Indigo/Challenge S before,
so identifying this machine on my own would have been a total guess
without the resources of this list and its archive.
Now the fun begins.