[rescue] AS/400? Anyone?

Patrick Finnegan pat at computer-refuge.org
Fri Jan 18 00:09:13 CST 2008

On Friday 18 January 2008 00:42, Geoffrey S. Mendelson wrote:
> On Thu, Jan 17, 2008 at 11:30:20PM -0600, Jonathan C. Patschke wrote:
> > They run it as natively as the original AS/400s did.  The original
> > AS/400 systems were a 48-bit CISC system hardware-wise, but the VM
> > was a 128-bit memory-mapped-everything architecture.  The new ones
> > are a 64-bit RISC system running the same VM architecture.
> The way I interpret this is that the AS/400 ran an "improved" System
> 38 emulator, and the RS6000 runs a hardware assited version of the
> same emulation, now ported to the RS6000.
> My PC has a nameplate on it reading "IBM 3145 Processor" and runs
> VM/370 and MVS. Does that make it a 370/145? I don't think so, and
> therefore IMHO an RS6000 effectively running the same emulation as an
> AS/400 did, not an AS/400, but an RS6000.
> I also interpret what you said to mean that the actual AS/400
> instruction set is not emulated or run natively by anything, so that
> makes it (again IMHO) dead and gone.

There is no such thing as a "native" AS/400 instruction set, 
realistically.  AS/400s have always run a (specific to the machine it's 
on) emulator to run "AS/400 code".

By your definition, AS/400s were "dead and gone" before the day they 
first shipped.  This makes no sense.

Purdue University ITAP/RCAC       --- http://www.rcac.purdue.edu/
The Computer Refuge               --- http://computer-refuge.org

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