Subject:
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Re: text location for apps and q?
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Fri, 27 Oct 2000 14:49:02 GMT
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Viewed:
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1397 times
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On Fri, 27 Oct 2000, imel sayang wrote:
> for the output device thing, the lcd isn't the only device. sensors
> and motors are also can be implemented as files.
Ok, but why? Again, if you're just having fun, go for it, but don't expect
it to be useful. Personally, the current interface is simple and highly
functional, and a change to a file paradigm would just make it more
complicated with no benefit. Having a standard interface is not a big
thing since code isn't going to port directly regardless of the interface,
and it takes only a few minutes to learn the new one.
> also for luis, it's not just about performance, it's about
> interface.
> of course there's always hack value, but it also might be useful.
> like many people would expect printf() or write() to stdout
> instead of
> cputs(). i don't think there's a better or worse interface, but
> there's a standard.
Again, overkill. You can output a grand total of five characters.
> of course, cmiiw, as noone has answered the text location thing, i
> think they have separate address space (without protection?). so
> the kernel has 16k max, and for 16k for programs. and 16k is
> surprisingly large.
There's no memory management unit, so you are correct that there is
absolutely no protection. That's one thing that makes debugging under
legOS so fun! :) The unit has 32k of memory, so the sizes make sense. You
may be correct that the program is divided into kernel and user space, but
that doesn't make a lot of sense to me. Of course there may be reasons for
it I do not know.
--
"Say not, 'I have found the truth,' but rather, 'I have found a truth.'
"Say not, 'I have found the path of the soul.' Say rather, 'I have met the
soul walking upon my path.'" -- Khalil Gibran
Mike Ash - <http://www.mikeash.com/>, <mailto:mail@mikeash.com>
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Message is in Reply To:
 | | Re: text location for apps and q?
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| (...) for the output device thing, the lcd isn't the only device. sensors and motors are also can be implemented as files. (...) well it's still just an idea, maybe the fork() will turn out as rfork(). doesn't really matter now. but see my other (...) (24 years ago, 27-Oct-00, to lugnet.robotics.rcx.legos)
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