 | | 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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