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From: "Robert S. White" <RSWhite@CACD.Rockwell.com>
Subject: Re: PLGR bridge is falling down...
Date: 1996/06/18
Message-ID: <31C6EB54.6EAF@CACD.Rockwell.com>#1/1
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cc: Antialias9 <antialias9@aol.com>
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organization: Rockwell International, CACD
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Date: 1996-06-18T00:00:00+00:00
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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