Article 1673 of vmsnet.pdp-11:
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From: moeller@ksr1.gwdg.de (Wolfgang Moeller)
Subject: Re: Emulating PDP-11 OS under Alpha?
Message-ID: <MOELLER.93Aug4195146@ksr1.gwdg.de>
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Organization: GWDG Goettingen, F.R.Germany
Date: 4 Aug 93 19:51:46
Lines: 26

Just for the record - in the days of the VAX 11/780
I wrote a (cheap & dirty) RT11(V4.?)-emulator based 
on the 780's compatibility mode, under which I at least
could cross-compile for a lonely LSI-11.

When the compatibility mode was dying out, I rolled my own
"LSI-11" emulator (w/o I/O page) in VAX MACRO - 
quite a bit slower than DEC's thing (used with VAX/RSX), 
but in turn much smaller (DEC's was about 1 MByte of code, 
unbelievably huge in the olden days!). One of my favorite 
VAX benchmarks was running a certain ("NHD" Fortran) 
Fourier transform under this emulator ;-)

Right now, for the sake of that benchmark only, 
I'm trying to port that program to the Alpha - 
but don't hold your breath, I made heavy use of (VAX)
"MOVPSL" which has to be replaced (I think) in order
to get the condition codes right, and so far I have 
only a guest account on an Alpha ...

P.S. I very rarely read this group, so please CC: me 
in your replies.

Wolfgang J. Moeller, GWDG, D-37018 Goettingen, F.R.Germany | Disclaimer ...
PSI%(0262)45050352008::MOELLER       Phone: +49 551 201516 | No claim intended!
Internet: moeller@gwdgv1.dnet.gwdg.de    | This space intentionally left blank.