[rescue] AS/400 question
Charles Shannon Hendrix
shannon at widomaker.com
Thu Jun 5 18:03:10 CDT 2003
On Thu, Jun 05, 2003 at 05:47:11PM -0400, Dave McGuire wrote:
> On Thursday, June 5, 2003, at 05:34 PM, vance at neurotica.com wrote:
> >> I meant the kind of info that'd be required to port a free
> >>OS...architecture specs, hardware FAQs, how to get one from a surplus
> >>house and get it running, etc. IBM will *never* publish info like
> >IBM publishes the assembler programming guide for these machines. That
> >should help, no? It contains info on the instruction set, including
> >formats and indirection, firmware specs, and stuff like that.
> They do? Why did the Linux guys have such a hard time finding it?
> They eventually gave up, from what I read.
As far as I know, programming assembly on an AS/400 is at a fairly high
level, believe it or not.
You are actually programming a virtual machine of sorts, on top of the
real OS and hardware.
At least, that's how I've understood the S/38 and AS/400 systems.
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