 | | 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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| | 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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| | 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: 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: 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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| | 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: 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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| | FW: Mindstorms/reinforcement learning
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-----Original Message----- From: Ralph Hempel [mailto:rhempel@bmts.com] Sent: Wednesday, October 13, 1999 11:59 AM To: Blake Winton Subject: RE: Mindstorms/reinforcement learning (...) Yes!!! The simple FORTH tutorial is good. Thanks for the link. (...) (25 years ago, 13-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | RE: Forth vs Assembler
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(...) There are a couple of reasons to choose pbFORTH over raw assembler... 1. Assembler requires an assembler, which means downloading and configuring the GNU tools on eiher Linux or Cygwin for Win9x. Not for the faint of heart. 2. Once you get (...) (25 years ago, 13-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | RE: Mindstorms/reinforcement learning
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(...) Declaring variables (almost any number of them) in pbFORTH is like this: VARIABLE FOO Fetching and storing is like this: 23 FOO ! ( this stores the value ) FOO @ ( this fetches the value ) Values are 16 bit integers - 32 bit doubles use a (...) (25 years ago, 13-Oct-99, to lugnet.robotics, lugnet.robotics.rcx.pbforth)
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| | RCX Image Uploader Wins Contest
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Hmmm - I just got emailed that I won the "Best Lightweight Use" of the TclTk programming language in a contest sponsored by Scriptics (URL) Here's the URL from Scriptics and if you follow the link to me on that page it'll take you right to my (...) (25 years ago, 25-Aug-99, to lugnet.robotics.rcx, lugnet.robotics.rcx.pbforth)
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| | Re: New pbFORTH 106 release
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Hi Ralph, Thanks for the new release. I have a couple of questions: 1. How do I use BUTTON_GET? The documentation says it just expects to find an address on the stack, but I get this: RCX_BUTTON BUTTON_GET BUTTON_GET ? stack underflow 2. What (...) (25 years ago, 29-Jul-99, to lugnet.robotics.rcx.pbforth)
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