Subject:
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Re: legOS and alternate operating systems [now off topic]
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 31 Dec 1998 05:02:30 GMT
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Original-From:
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John A. Tamplin <JAT@TRAVELLER.avoidspamCOM>
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Viewed:
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1122 times
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On Wed, 30 Dec 1998 MwalimuB@aol.com wrote:
> Actually, how big the executable is depends on the compiler. I don't do C,
> but, in other compilers this is the case. For instance, Turbo BASIC would
> produce a 47Kb executable of "hello world" because it links a library of
> subroutines that for the most part won't be used. ASIC, another BASIC
> compiler, writes the same program in less than 100 bytes - basically the
> string "hello world <CRLF>" and a BIOS call.
That is partly the compiler and partly the linker and partly the idiot
that put it togeter. Personally, I would be leary of generating a direct
BIOS call in the generated code, but then I would avoid BASIC anyway. Even
putting the actual display code in a library, if it is done properly you only
link in that one object module which may be a few K if it does memory mapped
display handling itself.
> My point has been that it seems that it takes an awful lot of computer
> resource to program an 8 bit microcomputer. I was just wondering if there was
> a reason for this. It appears that the reason is the overhead needed for the
> overblown operating systems on our newer computers.
Most embedded development systems have a very minimal development
library, if they have any at all. For example, legOS doesn't depend on *any*
external routines and thus is quite small.
John A. Tamplin Traveller Information Services
jat@Traveller.COM 2104 West Ferry Way
256/705-7007 - FAX 256/705-7100 Huntsville, AL 35801
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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