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A little bit off topic perhaps, but the Aug-1987 HP Journal covers the HP-28C/S and also explains why RPL was chosen:

The HP-28C firmware was developed in a year by a small
team using the RPL operating system and language (see the
article on page 21). The use of a highly structured language
was necessary for the implementation of symbolic mathe
matics, but also yielded a significant increase in productiv
ity compared with previous products, which were coded
entirely in assembly language.
(09-04-2014 06:02 PM)jebem Wrote: [ -> ]A little bit off topic perhaps, but the Aug-1987 HP Journal covers the HP-28C/S and also explains why RPL was chosen:

The HP-28C firmware was developed in a year by a small
team using the RPL operating system and language (see the
article on page 21). The use of a highly structured language
was necessary for the implementation of symbolic mathe
matics, but also yielded a significant increase in productiv
ity compared with previous products, which were coded
entirely in assembly language.

how to fall in love with a calculator, Jose Smile
(09-04-2014 02:19 PM)Thomas Radtke Wrote: [ -> ]Uploaded it here ...

https://www.dropbox.com/s/i7vn5bbgwm246t...s.pdf?dl=0

... but won't keep it there forever.

Wonderfull ! Many thanks Smile
I'm so happy to find every time new papers about RPL.
(09-04-2014 06:33 PM)aurelio Wrote: [ -> ]
(09-04-2014 06:02 PM)jebem Wrote: [ -> ]A little bit off topic perhaps, but the Aug-1987 HP Journal covers the HP-28C/S and also explains why RPL was chosen:

The HP-28C firmware was developed in a year by a small
team using the RPL operating system and language (see the
article on page 21). The use of a highly structured language
was necessary for the implementation of symbolic mathe
matics, but also yielded a significant increase in productiv
ity compared with previous products, which were coded
entirely in assembly language.

how to fall in love with a calculator, Jose Smile

Indeed... Smile
(09-04-2014 02:19 PM)Thomas Radtke Wrote: [ -> ]Uploaded it here ...

https://www.dropbox.com/s/i7vn5bbgwm246t...s.pdf?dl=0

... but won't keep it there forever.

Very good paper, I think it deserves a more permanent link, so I put it here:

http://hpgcc3.org/images/Documents/Wickes.pdf

It's not linked from anywhere else but this forum.

Claudio
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