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 Robotics / RCX / *305 (-20)
  Some goals, ideas, etc. for a new bytecode interpreter (long)
 
Forgive me while I think out load here. I'd like some feedback on some goals and ideas I've thought of for a new bytecode interpreter. Any critiques, comments, opinions, recommendations, or additions are welcome: I would hope that the new system (...) (25 years ago, 8-May-99, to lugnet.robotics.rcx)
 
  FWD: Re: Some comments (long)
 
(...) In environments which provide general purpose pointer types which can be assigned to addresses of explicitly allocated memory (like C and C++), garbage collection becomes an NP-hard problem. In environments which have no end-user accessible (...) (25 years ago, 8-May-99, to lugnet.robotics.rcx)
 
  New firmware volunteer
 
I'm following with great interest the discussion about a new firmware for the RCX. When the discussion started, I expressed some opinions about staying as much compatible as possible with the official firmware. Now, after a second thought, I realize (...) (25 years ago, 8-May-99, to lugnet.robotics.rcx)
 
  ------( Terms of use for lugnet.com )------
 
TERMS OF USE FOR LUGNET.COM OVERVIEW AND DEFINITIONS lugnet.com ("LUGNET") is a privately owned Internet site designed and run primarily for the benefit of those who enjoy building with, discussing, collecting, buying & selling, trading, and (...) (25 years ago, 7-May-99, to lugnet.robotics.rcx)
 
  ------( Welcome to lugnet.robotics.rcx )------
 
Welcome to lugnet.robotics.rcx, a LUGNET discussion group. CHARTER/PURPOSE: lugnet.robotics.rcx (group): Alternative firmware for RCX programmable brick from LEGO® MINDSTORMS™ RIS: in-depth technical discussions, collaboration, planning, (...) (25 years ago, 7-May-99, to lugnet.robotics.rcx)
 
  Re: two task and while true
 
(...) Hmm: - I believe that, after main starts, unless you press IN_3 *very* quickly, that IN_3 will not be 1, hence stop wb will be chosen. Perhaps you want something like this? : task main { while (true) { wait(IN_3 == 1); // start motor wait(IN_3 (...) (25 years ago, 7-May-99, to lugnet.robotics.rcx.nqc)
 
  Re: Lego Network Protocol questions
 
(...) I believe transmission and reception are independent, i.e. the emitter circuit is decoupled from the receiver circuit. The hardware on the H8 is full duplex. Once you finish sending a byte, I think you get two interrupts: one saying a byte has (...) (25 years ago, 5-May-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
 
  Floating point emulation
 
I succeeded in using (emulated) floats in a legOS program. Here are some instructions in case some of you want/need to try 32 bit FP emulation. First of all I must point out that I have no merit at all in having got this result, a part from having (...) (25 years ago, 5-May-99, to lugnet.robotics.rcx.legos)
 
  Re: Lego Network Protocol questions
 
(...) Just to state my interests: I'm mainly interested in the protocol, eg what level of service it would provide etc. In particular, I'm interested in layering a higher level gauranteed delivery protocol atop whatever simple one is provided. (...) (...) (25 years ago, 5-May-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
 
  Re: I'm being stupid. But how?
 
Here's the fair play policy: (URL) right. The Lego Group is exceedingly protective of their trademarks and intellectual property. If they haven't pursued action against legOS, it's very likely a deliberate policy rather than an oversight. Jonathan (...) (25 years ago, 5-May-99, to lugnet.robotics.rcx.legos)
 
  Re: Lego Network Protocol questions
 
In lugnet.robotics.rcx.legos, Ralph Hempel writes: [ ... ] (...) This is actually the book from which the thoughts I posted about arose. It is, indeed, a great book ;-) (25 years ago, 5-May-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
 
  Re: communication Linux - NQC - Cybermaster
 
(...) Yep, NQC assigns from 0 up. The listing (use -L) will print out the variable cross reference for an NQC program. Dave (25 years ago, 5-May-99, to lugnet.robotics.rcx.nqc)
 
  Re: I'm being stupid. But how?
 
(...) Considering the past history of TLG, I'd say the fact that they haven't said anything about the name LegOS says a lot. TLG is paranoid about their trademark. Use Lego like a noun (as in, "I liked Legos a lot when I was a kid," or "I play with (...) (25 years ago, 4-May-99, to lugnet.robotics.rcx.legos)
 
  Re: I'm being stupid. But how?
 
(...) Lego's always been a bit of a hobbyist's thing[1] so probably even TLG thinks there isn't much point in siccing lawyers on us, even if they disapproved. Big companies[2] lawyering hobbyists is really bad PR :) [1] not in any way derogatory, (...) (25 years ago, 4-May-99, to lugnet.robotics.rcx.legos)
 
  Re: HOWTO v 0.1
 
(...) Not ATM. (If I get gdb actually *working* with the LegOS I'll do a little HOWTO for that and stick it on the web, though... has anyone got it working right yet? I'm not stuck or anything, I just haven't finished getting it running.) (25 years ago, 4-May-99, to lugnet.robotics.rcx.legos)
 
  tm-and-ir.c
 
Is anyone else having problems with this? The receive and display part works fine but it won't send "Hello World" when I press the View button. The srec from the LegOS home page works fine but if I build it myself it doesn't. I've tried both the web (...) (25 years ago, 1-May-99, to lugnet.robotics.rcx.legos)
 
  Re: communication Linux - NQC - Cybermaster
 
(...) Thanks for your suggestions. Say, just what is variable 0? The first variable assigned? I should probably try to read some more about the internals of the RCX/Cybermaster, I suppose. Fredrik (25 years ago, 4-May-99, to lugnet.robotics.rcx.nqc)
 
  Re: I'm being stupid. But how?
 
(...) Hahaha, regarding that LegOS is more of a library than an OS, my opinion too. But you have to admit the name has some appeal, even if it is something of a misnomer... :) Clearly it says something about TLG's attitude toward LegOS that they (...) (25 years ago, 3-May-99, to lugnet.robotics.rcx.legos)
 
  Re: HOWTO v 0.1
 
(...) Thanks (I think...) (...) Because I've found that it is significantly faster, and nearly canonical (as, technically speaking, it is part of the same domain, despite being hosted elsewhere(Stanford, IIRC.)) The only reason I found it in the (...) (25 years ago, 3-May-99, to lugnet.robotics.rcx.legos)
 
  I'm being stupid. But how?
 
I've written a test program using the 19990330 LegOS snapshot[1], and it's misbehaving oddly. The program looks like this: (the headers are the result of my frobbing the LegOS headers to refer to <mindstorms/{legOS header}>...) #include (...) (25 years ago, 29-Apr-99, to lugnet.robotics.rcx.legos)


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