[rescue] RE: [SunRescue] OT: AS/400 stuff
rescue at sunhelp.org
Wed Jun 6 20:14:51 CDT 2001
On Wed, 6 Jun 2001, Brian Hechinger wrote:
> are these things still $20k? i would really like to get one. although, looking
> at IBMs site you can buy refurb mainframes for >$10K but you still have the
> power issue. they take more than i have to give. :)
If you really want a 'frame at home...
The cheapest way is the 1985 XT and AT/370 which runs single user CMS.
You can run PL/I and the VS-Assembler on it.
The next step up is the FSI OPEN/370. It runs all S/370 mode software
including MVS/370, JES2, VTAM and all the S/370 compilers. It's a small
4381. Info at http://www.funsoft.com. Modern VLSI CMOS hardware, 3.5 PC
You could also get a 9370 or rack mounted ES/9000s. Some of those are
being given away, especially the under 5 MIPS systems but realisticly it
would take a few thousand dollars to get one. 4000 series systems are
true give-aways but they're so big and the DASD is huge.
You might also keep your eyes open for either a IBM 7437 box (about
the size of a IBM PS/2-model 80), which is a S/370 in a box that
attaches to a PS/2. They run about 750 kips (very rough estimate).
Another possibility is an IBM P/370 card, which was the precursor to the
P/390. The P/370 implements the S/370 on a card which plugs into a PS/2.
They run about 3.5-4 MIPs (Again, a very rough estimate).
You can run VM/ESA-370 Feature on either of these (but can't run
VM/ESA since these are only S/370 systems).
The XT/370 is not a full S/370 implementation (non-priviledged
instructions only), and requires a special VM/PC operating system.
Additionally, it's even slower at about 50 KIPs. I still have an AT/370
kicking around but not the software to drive it (it differs from the
XT/370 s/w). There are also a bunch of other bizarre limits in it (32MB
max size of minidisk images, etc).
$20k for a P/390 is a deal, they were $50k from IBM not that long ago.
There's an amazing amount of engineering packed into that card.
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