Subject:
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Re: NQC v. LegOS / size
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 7 Feb 1999 13:18:59 GMT
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Original-From:
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Markus L. Noga <noga@inrialpes!nospam!.fr>
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Viewed:
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1334 times
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Hi Luis,
Luis Villa wrote:
> I run Linux. I sneer at "easy installation." :-)
I like your attitude ;-)
There's a new precompiled package of H8 tools for Windows around (~8MB
zipped, ~22MB installed), courtesy of Dave Madden. My precompiled
Linux/glibc package (~1.5MB gzipped, ~3.4 MB installed) is equally easy
to install and a lot smaller. This is mainly because the operating
system provides tools instead of animated icons.
legOS source and NQC binaries themselves are both neglectible in size,
as you'll see below. Notice the difference in efficiency for the
different compression algorithms. bzip2 is just included for comparison
- at the order of magnitude we're at, it's not worth the bother.
-rw-rw-r-- 1 mlnoga mlnoga 53465 Feb 7 13:53
legOS-0.1.6.tar.bz2
-rw-rw-r-- 1 mlnoga mlnoga 60060 Jan 29 14:59 legOS-0.1.6.tgz
-rw-rw-r-- 1 mlnoga mlnoga 89612 Jan 29 15:00 legOS-0.1.6.zip
-rw-rw-r-- 1 mlnoga mlnoga 53361 Dec 4 11:47
nqc_lnx_1_0_b1.tgz
> Maybe Markus can answer this better, but is it full C? I got the
> impression that the H8300 patch to gcc had some limitations. Am I correct in
> this? If so, what are those limitations/shortcomings?
Apart from the limitations imposed by H8 architecture (an 8/16 bit
platform with the usual constraints on integer length, available memory
and library functions), there's mainly one language limitation I am
aware of.
Non-constant initialized global or static variables aren't safe to use.
Their initial values are usually written directly into the binary
program image by the compiler. On a system with normal task load
mechanism, they'd simply be reloaded for every execution, but under
legOS, their values currently won't be reset.
Other than that, happy hacking. Hashtables, red-black trees, fibonnaci
heaps - everything should be possible. Consult your favourite book on
algorithms and data structures. I recommend Cormen's.
Ciao, Markus.
--
Markus L. Noga noga@inrialpes.fr
Check out legOS! http://www.multimania.com/legos/
"He who quote merely employs his memory, not his reason." -Nietzsche
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 2 Replies:
 | | Re: NQC v. LegOS / size
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| (...) Actually, I ran into another - you can divide by numbers that aren't powers of two. At least, I can't. There seems to be a missing assembler routine. Cheers, Ben. -- (URL) grandfather once told me that there are two kinds of people: those who (...) (25 years ago, 9-Feb-99, to lugnet.robotics)
| | | Re: NQC v. LegOS / size
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| (...) I can't wait for the day the stability of Linux goes coupled with the nice animated icons of win98 :) Actually - Win98 is pretty stable *ignores the cries of "Heresy! Heresy!" and explains:* Actually, I'm sad to have to say it. but for (...) (25 years ago, 9-Feb-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: NQC v. LegOS
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| (...) I run Linux. I sneer at "easy installation." :-) (...) Maybe Markus can answer this better, but is it full C? I got the impression that the H8300 patch to gcc had some limitations. Am I correct in this? If so, what are those (...) (25 years ago, 6-Feb-99, to lugnet.robotics)
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