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From: "Robert S. White" <RSWhite@CACD.Rockwell.com>
Subject: Re: PLGR bridge is falling down...
Date: 1996/06/20
Message-ID: <31C9CA78.EA4@CACD.Rockwell.com>#1/1
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Date: 1996-06-20T00:00:00+00:00
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(2'd attempt to get through firewall) Robert S. White wrote:
> 
> Antialias9 wrote:
> ...snip...
> > The PLGR is a ...
> >    and I hate programming it !
> >
> > (16 bit words on eight bit bus,
> > byte reversed, integers for two
> > of three coordinates with floating
> > point for the third, and the $#%@&*
> > buffer box message which can't be
> > disabled but must be acked!)
> >
> > Fred Kernster,
> > Principal Senior Staff Software Engineering Specialist-Missiles
> > McDonnell-Douglas Brewing Company                    ^^^^^^^
> > St.Louis MO
> 
> Whow...way off cla topic!  The PLGR is programmed in Jovial (J73/I).
> It uses a microprocessor that is little endian and its floating point
> ancestry is older than IEEE-754...sorry.  The processor architecture is
> like a cross between a PDP-11 and a HP-3000 (not a RISC machine but a
> very clean stack machine).  I don't know why you must ACK the buffer box
> (are you there?) interrogation message.  I've used simplistic PC based
> software that is passive...only displays PLGR output messages, with no
> problems.  We've given away software examples in the past on how to
> interact with CACD GPS receivers.
> 
>   You are not really programming a PLGR are you?  But rather just
> interfacing with it, right?  There are more than 50,000 of them out
> there.  It has been very successful...just a direct descendant of
> software that was started in the '70s (before Ada and IEEE-754).
> 
>   If you need help, take it to E-Mail.  Why flame at 3:00 am in the
> morning?  Oh-Oh this may be a troll...........-- 
Robert S. White                        | Opinions expressed are my own.
whiter@crpl.cedar-rapids.lib.ia.us     | An Embedded Systems programmer