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From: R_Tim_Coslet@cup.portal.com
Newsgroups: comp.arch
Subject: Re: 1620 simulatore???
Message-ID: <34878@cup.portal.com>
Date: 15 Oct 90 06:48:30 GMT
References: <270CB430.21156@ics.uci.edu> <213@opus.NMSU.Edu>
  <27698@bellcore.bellcore.com>
Organization: The Portal System (TM)
Lines: 25

>Does anyone know of a 1620 simulator in C?? I suspect that
>a modern micro would be at least 2 orders of magnitude faster
>as simulating a 1620 than the real one ran.  Just think!
>you could run MONITOR-I on it, for those of you who never had
>a 1301 disk on your 1620!
OH MY!!  I've thought of writing a 1620 simulator for my home computer
SO MANY times...  never did it yet though (I only have 3 or 4 decks of my
old 1620 programs left, no SPS or FORTRAN II compiler though... and without
a card reader wouldn't be much worth the trouble though).

I'm sure it would be at least that much faster... 1620 used 12 digit
instructions and spent 6 20us clock cycles fetching each one. MIGHT even be
able to EXECUTE a complete clear core instruction in less time then the
real 1620 took just to fetch it  :-)
>
>PS - the only problem would be that Peter Langston's program which
>played music through a radio placed on the console (yes, controlled
>interference!) probably wouldn't work.  All that nasty sheilding....
I remember hearing one that played music (jingle bells I think) on the
LINE PRINTER! That "flying bar" printer made lots of interesting noises!

                                        R. Tim Coslet

Usenet: R_Tim_Coslet@cup.portal.com
BIX:    r.tim_coslet