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 | | RE: Rotation sensors?
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| (...) Thanks for attaching the code Jonathan. Before I go through the steps of trying this out, what do you mean by doesn't work? ie. 1. Does it hang and not display anything? 2. Does it display the same data all the time? 3. Does it not respond to (...) (25 years ago, 4-Jun-99, to lugnet.robotics.rcx.pbforth)
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event
(score: 0.976)
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| | Re: signals / legOS internals
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| (...) An ISR can certainly modify data that is used by the executing code. For example, if it doesn't save registers that are used the interrupted code will certainly be affected. In fact, the ISR is of little use if it doesn't modify data that can (...) (25 years ago, 23-Jun-99, to lugnet.robotics.rcx.legos)
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event
(score: 0.975)
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| | Re: Multi-RCX Dreaming
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| (...) [ ... ] (...) Well, it hasn't actually died, just slowed down a bit. If you look on lugnet.robotics.rcx.legos there has been some very low-level talk recently. I haven't done *any* lego stuff recently, but, when I do I'll likely be doing (...) (25 years ago, 18-Jun-99, to lugnet.robotics)
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event
(score: 0.974)
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| | Re: Multi-RCX Dreaming
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| (...) Along these lines, I'm still curious about those ruminations that were talked about on this list or maybe the .rcx or .rcx.legos lists regarding transmission algorithms. Not really having enough interest in the topic, I do not have the (...) (25 years ago, 18-Jun-99, to lugnet.robotics)
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event
(score: 0.974)
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| | [ANN] pbFORTH 1.0.5 for RCX
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| Finally, I have got pbFORTH to where I can release it again. It now has: - A simple cooperative tasker - A marker word so you can erase things easily - Support for poweroff - High res (10msec) count down and stop timers - Various and sundry fixes (...) (25 years ago, 21-Jun-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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event
(score: 0.974)
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| | Re: signals / legOS internals
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| Ola, I do not see why you persist. I understand that a signal handler is very low level, that it is difficult to use right, that it only allows some things and not others, unless you're very careful. But you still missed my point, which was this: (...) (25 years ago, 25-Jun-99, to lugnet.robotics.rcx.legos)
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event
(score: 0.974)
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| | Re: signals / legOS internals
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| (...) This is the same thing as most modern RTOS use, called various things. The terminology I use for this is FLIH/SLIH (first level interrupt handler and second level interrupt handler). Coupled with lock priority inheritance, it makes for a very (...) (25 years ago, 23-Jun-99, to lugnet.robotics.rcx.legos)
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event
(score: 0.974)
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| | Re: signals / legOS internals
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| (...) But hardware interrupts schedule a different context (the interrupt process or ISR) from the one already executing. A Unix-style signal asynchronously signal interrupts the executing process and jumps to a different location in the code that (...) (25 years ago, 23-Jun-99, to lugnet.robotics.rcx.legos)
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event
(score: 0.974)
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| | Re: signals / legOS internals
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| (...) Because they are useful at times, and Markus directed me to implement them. I think the upcoming network code is going to use them, too (at least, that's what I heard). Just 'cause they're there doesn't mean you have to use them. (...) How do (...) (25 years ago, 23-Jun-99, to lugnet.robotics.rcx.legos)
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event
(score: 0.974)
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| | Re: signals / legOS internals
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| (...) They could. In fact, there may be cases where that is exactly what you want to do. However, that requires you to write your code to examine the semaphore at every point where you would want to consider processing the event. It is more work. (...) (25 years ago, 26-Jun-99, to lugnet.robotics.rcx.legos)
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event
(score: 0.973)
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| | Re: signals / legOS internals
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| (...) Now keep in mind that this is coming from someone who won't take Duke's OS class until next spring- is there any reason the current semaphore implementation couldn't be used for a large percentage of these tasks? I.E., thread A checks (or uses (...) (25 years ago, 26-Jun-99, to lugnet.robotics.rcx.legos)
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event
(score: 0.973)
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| | Re: signals / legOS internals
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| (...) No, you should not abandon your implementation - not if you want to use LegOS. I was only explaining how I implemented similar functionality, for the sake of comparison. Regarding Librcx, I might release another version at some point, to add (...) (25 years ago, 26-Jun-99, to lugnet.robotics.rcx.legos)
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event
(score: 0.973)
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| | Re: Interactive human-controlled bots
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| (...) you (...) Check out the description and pictures of the recent "Robogladiator" event: (URL) wasn't there, but it looks like it was fun. The site shows pictures of 6- button controllers made up of two RCXes (not counting at least one to control (...) (25 years ago, 26-Jul-99, to lugnet.robotics)
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(score: 0.971)
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event
(score: 0.971)
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| | Re: BrickOS Patches and Development
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| The Bibo Patch Rollup Collection posted to SourceForge at (URL) been updated. New for this update are patches 25 through 35. 25: Cleanup in the util subdirectory - Updated lnpmsg to more cleanly handle and process command-line arguments - Removed in (...) (15 years ago, 24-Jun-09, to lugnet.robotics.rcx.legos)
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(score: 0.971)
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(score: 0.971)
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| | Re: Message from TLG!
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| This is very exciting. The page of relevant links includes both LUGNET and Russel Nelson's Mindstorms Internals page. (The event is hosted by MIT, not LEGO, so I assume no corporate myopia will limit the scope.) If anyone didn't get the email, (...) (25 years ago, 30-Jul-99, to lugnet.robotics)
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event
(score: 0.971)
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| | emulegOS: a new release
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| Mark Falco improved his Tcl/Tk version of emulegOS with tons of cool features. This version is now considered the "official" version of emulegOS, and we hope to release a Tcl based Windows version soon. The new features include: - IR support: (...) (25 years ago, 21-Jul-99, to lugnet.robotics.rcx.legos)
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