 | | RE: NQC wishlist
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(...) This might be a good idea. The pbForth thing is working out well too. Maybe a C to FORTH translator would be useful. In the other hand, making a custom bytecode interpreter means having to write the interpreter and support it on different (...) (26 years ago, 4-Jan-00, to lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)
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| | Re: NQC wishlist
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(...) To me, one of the important features of such a thing would be compatibility with the existing firmware. Otherwise, why not just use LegOS? (26 years ago, 4-Jan-00, to lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)
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| | Re: NQC wishlist
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If anyone is seriously considering this I'd ask two things... 1) Have you considered porting the p-code interpreter used by Interactive C or something like a stripped down Java bytecode interpreter instead? The idea here would be that the RCX (...) (26 years ago, 4-Jan-00, to lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)
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| | Re: NQC wishlist
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(...) Yeah, this was discussed way back at the beginning of the reverse-engineering effort. It's something I'd like to see too. (26 years ago, 4-Jan-00, to lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)
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| | Re: NQC wishlist
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I was jut wondering, has anybody tried to implement a "better RCX-code"? It must be possible to write something very similar to RCX-code in LegOS, only faster and implementing the "missing" array structures and more variables. Mayby compatible with (...) (26 years ago, 4-Jan-00, to lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)
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| | Re: USB->Serial Converts and IR Tower
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Is that on a PC? I have one running with the latest drivers from their site. It works fine for small snippets of code, but always times out, when trying to download larger segments or firmware. What exact driver version do you have. What exact (...) (26 years ago, 4-Jan-00, to lugnet.robotics, lugnet.robotics.rcx)
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| | Re: Problems with RCX Robolab and PowerMacs 6400/200 and 5500/225
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(...) This one works for me just fine. Dw (26 years ago, 3-Jan-00, to lugnet.robotics, lugnet.robotics.edu, lugnet.robotics.rcx.robolab, lugnet.edu, lugnet.robotics.rcx)
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| | Re: Speed of RCX interpreting bytecodes: slow
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(...) half (...) Yes, it seems to switch between two 'modes', one being effectively single tasking, and the other multi-tasking. This gives the change you are seeing. The 'loop' time, can be measured very easily with a scope, by setting a motor (...) (26 years ago, 3-Jan-00, to lugnet.robotics.rcx)
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| | Re: Problems with RCX Robolab and PowerMacs 6400/200 and 5500/225
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Hello to all, Thanks for all those who wrote in with suggestions for how to get my RCX bricks to work with the PowerMac 5500s that I was having trouble with. Here's a summary of my experiences and how I eventually got enough working machine to teach (...) (26 years ago, 3-Jan-00, to lugnet.robotics, lugnet.robotics.edu, lugnet.robotics.rcx.robolab, lugnet.edu, lugnet.robotics.rcx)
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| | Re: Problems with RCX Robolab and PowerMacs 6400/200 and 5500/225
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I believe Fred Martin ran into similar problems and the serial extension did indeed help. I think his write-up of the issue is somewhere on his site: (URL) Baum (...) (26 years ago, 3-Jan-00, to lugnet.robotics, lugnet.robotics.edu, lugnet.robotics.rcx.robolab, lugnet.edu, lugnet.robotics.rcx)
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| | Re: Problems with RCX Robolab and PowerMacs 6400/200 and 5500/225
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I had a similar problem and suggested used the three cable method you mentioned with great success. Before I tried this I sent an inquiry to Dacta and got this response "There is an issue with some Macintosh serial ports that we are currently (...) (26 years ago, 3-Jan-00, to lugnet.robotics, lugnet.robotics.edu, lugnet.robotics.rcx.robolab, lugnet.edu, lugnet.robotics.rcx)
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| | Re: Speed of RCX interpreting bytecodes: slow
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(...) Are you sure you mean each of the POSSIBLE threads? I did test to see whether it was slower to count to 1000 with another task running, and it was. Not half as fast, only about 30% slower. --Ben (26 years ago, 3-Jan-00, to lugnet.robotics.rcx)
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| | Re: Speed of RCX interpreting bytecodes: slow
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(...) Yes. It is important to realise, that the RCX, does not perhaps do the interpretation in the way you think. In each 'loop', it executes one instruction from each of the possible threads, and also reads the A-D's, on each sensor, and updates to (...) (26 years ago, 2-Jan-00, to lugnet.robotics.rcx)
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| | RE: Speed of RCX interpreting bytecodes: slow
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Ben jackson wrote... (...) Yes, that's why pbForth is "almost ANSI" which means that it is as close to standard ANSI Forth as I could get. And PS is NOT Forth, it is Forth-like. (...) That just adds about 4 items to a datalog, (once every 256 loops, (...) (26 years ago, 2-Jan-00, to lugnet.robotics.rcx)
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| | RE: Speed of RCX interpreting bytecodes: slow
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(...) OK, I did some basic timing experiments....for pbForth. : TEST1 10000 0 DO LOOP ; \ This is a hard loop of 10000 iterations : TEST2 10000 0 DO I DROP LOOP ; \ Same loop except the loop index is put on the \ stack and dropped - a no-op (...) (26 years ago, 1-Jan-00, to lugnet.robotics.rcx)
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| | RE: Speed of RCX interpreting bytecodes: slow
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(...) Check out pbForth too! I will get around to doing some basic loop timing if you ask me nicely and tell me what kinds of test would be useful to do! pbForth is ready to run right out of the box, there is no compiler to mess with, and it's fun (...) (26 years ago, 1-Jan-00, to lugnet.robotics.rcx)
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| | Speed of RCX interpreting bytecodes: slow
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While working on the barcode scanner I decided to see just how fast the RCX could loop. A simple NQC program can do about 1000 counter loop iterations in about 100 ticks, or 1 iteration/ms. This is shockingly slow. The native H8/329 is clocked at (...) (26 years ago, 1-Jan-00, to lugnet.robotics.rcx)
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| | Re: USB->Serial Converts and IR Tower
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(...) The Keyspan PDA adaptor (www.keyspan.com) works just fine with an apple and/or the VirtualPC on the apple. Dw (26 years ago, 31-Dec-99, to lugnet.robotics, lugnet.robotics.rcx)
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| | Re: USB->Serial Converts and IR Tower
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Ram Meenakshisundaram <rmeenaks@olf.com> wrote in message news:386CCBC8.270472...olf.com... (...) Entrega's hubs with serial ports or the U1S9 work great IF you download the latest drivers (just got mine working this morning!) from Entrega. Barbara (...) (26 years ago, 31-Dec-99, to lugnet.robotics, lugnet.robotics.rcx)
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| | Re: USB->Serial Converts and IR Tower
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(...) Wow. I am suprised Belkin doesnt work. Their products are really good. I never heard of Peracom. I know that Lego claims that "it worked for some users", but I wanted to stick with brand-names that I was familar with. Does anyone know if Lego (...) (26 years ago, 31-Dec-99, to lugnet.robotics.rcx)
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