 | | Re: Sharing variables and using expressions (was Re: NQC 2.0 and some math questions
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(...) I appreciate this -- that's what the "Not Quite" is all about. As long as you explain things well, I think this kind of compromise is the right way. (25 years ago, 20-Oct-99, to lugnet.robotics.rcx.nqc)
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| | Re: Sharing variables and using expressions (was Re: NQC 2.0 and some math questions
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The optimization was intentional (and quite a lot of work, actually). I know it breaks with multiple tasks, but I was more concerned with keeping the variable pool from being cluttered with temporaries. With only 32 vars to use, its quite easy to (...) (25 years ago, 20-Oct-99, to lugnet.robotics.rcx.nqc)
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| | FW: RCX Firmware and SP
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-----Original Message----- From: Sergey Udovenko [mailto:udovenko@bluewin.ch] Sent: Tuesday, October 19, 1999 5:56 PM To: Ralph Hempel Subject: Re: RCX Firmware and SP Hi Ralph, I'm just yet another hobbyist, so nothing is special about my plans. (...) (25 years ago, 19-Oct-99, to lugnet.robotics.rcx.pbforth)
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| | RE: additional pbforth questions
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Hmm, this is the kind of message I should use for FAQ fodder... (...) You can run it either way. The original intent was to use the dumbest tool possible to interact with the RCX. For DOS this is Procomm Plus or some such tool, for Windows its (...) (25 years ago, 19-Oct-99, to lugnet.robotics.rcx.pbforth)
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| | additional pbforth questions
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Does pbforth run under dos or windows on the PC? Does it use blocks or dos/windows file system on the PC? Does it use blocks in RAM on the RCX? If I program directly on the RCX can I upload the programs to the PC for further development? In using (...) (25 years ago, 19-Oct-99, to lugnet.robotics.rcx.pbforth)
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| | 0.2.0a patch
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Hello, apparently I introduced a glitch when adding last-minute support for non-patched standard egcs. This and a broken symlink in the archive prevented dllback from compiling on the host. A patched version of legOS is available on (URL) for the (...) (25 years ago, 19-Oct-99, to lugnet.robotics.rcx.legos)
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| | RCX-enhanced egcs
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Hello, I just posted the final RCX interrupt handling patch for egcs. There is no need for wrappers anymore. Interrupt handlers can be declared like this now: void handler() __attribute__((rcx_interrupt)); void handler() { // do stuff } For a leaf (...) (25 years ago, 19-Oct-99, to lugnet.robotics.rcx.legos)
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| | pbforth questions
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My 15 year old son is into legos big time. He has asked for the Lego robot package. I developed in Forth many years ago and I am just getting back into it with Forth Inc.'s SwiftForth for Windows. I have enjoyed messing about with it but what I am (...) (25 years ago, 19-Oct-99, to lugnet.robotics.rcx.pbforth)
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| | Sharing variables and using expressions (was Re: NQC 2.0 and some math questions
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I have discovered a somewhat non-intuitive feature of NQC (in my version, at least, which is pre-2.0) The statement: var = (20 * var) / 21; gets compiled into the following: MUL var, 20 ; var = var * 20 DIV var, 21 ; var = var / 21 rather than the (...) (25 years ago, 19-Oct-99, to lugnet.robotics.rcx.nqc)
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| | RE: RCX Firmware and SP
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(...) Unfortunately, yes. The current version of pbFORTH allocates a 256 byte stack, but it's JUST above a 256 byte boundary. When you run the test code, everything works, but if your stack depth is around 12 and you run SENSOR_READ, it allocates (...) (25 years ago, 19-Oct-99, to lugnet.robotics.rcx.pbforth)
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| | Re: RCX Firmware and SP
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(...) [...] Hi Ralph, Could you please explain more about consequences for pbFORTH user? As far as I can see, pbFORTH uses fixed 256-byte stack - does it mean that pbFORTH suffers from this problem too? Thanks Sergey Udovenko (25 years ago, 19-Oct-99, to lugnet.robotics.rcx.pbforth)
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| | Re: Announce: NQCIPC -- simple IPC for Not Quite C programs
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[forwarding a copy to the .rcx.nqc newsgroup... --Todd] (...) (25 years ago, 19-Oct-99, to lugnet.robotics.rcx.nqc)
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| | RE: AI and even more exiciting stuff
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Richard, I hope you don't mind me using your quote... <snipped discussion of junior programmer and temp sensor application) (...) Yesss! I am going to tie the moon mission into my panel presentation at Mindfest. Here's a source I used on the Apollo (...) (25 years ago, 18-Oct-99, to lugnet.robotics.rcx.pbforth, lugnet.robotics)
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| | Re: Annoying Journalist's Request
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To the list: this morning is a break for me, so I'm going to use it to type this out. Hope no one minds that it gets sent to the "annoying journalist" as well. Here at Duke, we are teaching a class with the mindstorms. Recently, we completed a class (...) (25 years ago, 18-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.legos)
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| | RE: AI and even more exiciting stuff
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(...) OK, time to get out the soapbox. If you are trying to teach AI, and are using floating point math, then you probably have really fast computers with floating point processors that are sometimes quicker than equivalent fixed point calcs...... I (...) (25 years ago, 18-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | RE: AI and even more exiciting stuff
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(...) Well, we are trying to teach AI, not embedded systems :) Towards that end, we've sort of tried to simplify things as much as possible for the kids who are taking the class, since most of them will probably never do an embedded system again. (...) (25 years ago, 18-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | RE: AI and even more exiciting stuff
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(...) Yes, and no. It is an interpreter, that you can type (or upload) ASCII text to. It then compiles it into an efficient bytecode (really 16 bits) that lets you execute later. It allows for LOTS of variables and best of all, you don't need to be (...) (25 years ago, 18-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | RE: AI and even more exiciting stuff
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(...) ACK! Don't they teach fixed point any more? I encourage anyone to post an application where the dynamic range of signed 32 bit values is outside the range of numbers which would be useful to an RCX application! I'm not flaming, I'm just trying (...) (25 years ago, 18-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | Re: legOS 0.2.0 released
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Well, this is a bad week to say the least, but I hope to have rudimentary HOWTO stuff for 0.2.0 within two weeks. Thanks for everything, Markus! Luis (...) ###...### Profanity is the one language that all programmers understand. -Anonymous ###...### (25 years ago, 18-Oct-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
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| | legOS 0.2.0 released
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Hello, legOS 0.2.0 is out. If you like to program your Mindstorms in C, or if you would like to try, it has become better than ever. Dynamic linking and program loading are fully supported now, as well as unreliable LNP datagram networking. Lots of (...) (25 years ago, 19-Oct-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
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