sdc695 at yahoo.com
Fri Mar 23 12:54:07 CDT 2007
On Thu, 22 Mar 2007 19:20:51 -0700, "Chuck Guzis" <cclist at sydex.com> wrote:
> On 22 Mar 2007 at 14:59, Steve Wilson wrote:
> > >4900796 (Somebody will understand this reference)
> > Someone is trying to boot Fortran off of the Disk on an IBM 1620 me
> Isn't 00796 where all-well-behaved programs went to die? I.e. reload
> Monitor (sort of a CALL EXIT)?
We have a winner.
Just to add to the trivia, to boot the disk you needed a few more characters:
Which if you were on a model 2, you needed to make sure that indirect
addressing was turned on (nothing worked right if you didn't!).
After doing that a few times, you remembered it pretty well.
OB Fortran reference:
There were several "load & go" Fortrans available for the 1620. The one I
liked the best was Witran. It fit into a 20k machine, but was interpreted.
Still not too bad for a Fortran. The best was the Monitor II Fortran II. It
generated automatic floating point instructions, and used index registers (only
for the compiler I think). Pretty speedy. The hardware floating point on a
1620-II was faster than the software on the (next generation) IBM 1130 (I used
that too). The 1620's bonus was that standard precision (in floating point)
was 8 significant digits. If you really felt ambitious, you could go MUCH
higher (28 digits with Fortran-II). Few machines today can match that in hardware!
tsw at johana.com
Get your own web address.
Have a HUGE year through Yahoo! Small Business.
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