 | | 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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| | RCX Firmware and SP
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Hi All, After a very frustrating weekend of fiddling with pbFORTH, I caved and asked Kekoa to help with a problem I was having with read_sensor() and pbFORTH. The problem we (mostly he) unearthed has to do with the SP and RCX firmware routines, so I (...) (25 years ago, 17-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.legos, lugnet.robotics.rcx.pbforth)
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| | Re:Solved?? rotation sensor problem
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On Sep.10,I posted the message regarding rotation-sensor problem. I realized that the first threshold value '0x6fc0' in CURRENT_STATE is too small. Some sensors give raw values around 0x7000. #define CURRENT_STATE (raw<0x6fc0?STATE_0:...STATE_3))) (...) (25 years ago, 17-Oct-99, to lugnet.robotics.rcx.legos)
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| | RE: Rotaion Sensor Sampling Speed?
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(...) I thought the problem was that it vibrated itself? (...) <snip forth code, which looks cool :)> (...) Take a look at the code that Markus sent out a while ago with the new firmdl he cooked up, particularly the code in keepalive.c and the code (...) (25 years ago, 14-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | RE: Rotaion Sensor Sampling Speed?
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(...) Well, I'd need to vibrate things while looking at raw values, which is possible, I guess. I could run the gantry, smaple as long as possible and then store the value in an array... Something like: CREATE BUFFER 5000 CELLS ALLOT ( makes room (...) (25 years ago, 14-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | RE: pbForth
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(...) I think there are some C to FORTH translators at www.forth.org, but the problem is you need to configure them to run on your CPU and then to output FORTH compatible with your target. Not an easy task. Why not just learn FORTH? I learned about (...) (25 years ago, 14-Oct-99, to lugnet.robotics.rcx.pbforth)
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