 | | 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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| | Re: USB->Serial Converts and IR Tower
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Somewhere on the Mindstorms site, I found a reference to the Peracom adapter. I have not tried it, but I did buy a Belkin USB Hub with a serial port and I know that the Belkin doesn't work. Scott (26 years ago, 31-Dec-99, to lugnet.robotics.rcx)
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| | Connecting Via a USB Hub
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I have a USB Hub with an RS-232 port. When I connect the IR Transmitter to this port, the firmware downloads fine. If I have a program with a single RCX command block, it's fine too. If I have more than one command block, I get a download error. Any (...) (26 years ago, 30-Dec-99, to lugnet.robotics.rcx)
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| | USB->Serial Converts and IR Tower
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Hi, I only have one serial port on my PC and it is currently hooked up to an external modem (PC slots are precious to me). So, I was planning on using an USB->Serial converter. Can anyone recommend a brand that has been proven to work with the IR (...) (26 years ago, 31-Dec-99, to lugnet.robotics, lugnet.robotics.rcx)
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| | barcode reader for RCX (was: how does a bar code reader work?)
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(...) Well, I tried this, and it's hopeless. The RCX can't poll the sensor nearly fast enough, and even if it could you'd need a lens to focus the sensor better. (...) Instead of using my idea, I took the suggestion of someone else and just used a (...) (26 years ago, 30-Dec-99, to lugnet.robotics, lugnet.trains, lugnet.robotics.rcx)
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| | Re: differences between 9719 and 9747?
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Hi, Note that if you get the RIS 1.0 -> RIS 1.5 upgrade (costs $25.00, but free if you bought your RIS 1.0 after August), it includes the 60 missing pieces, additional CD, manuals, and test pads. Plus the RIS 1.0 has the AC adapter while the RIS 1.5 (...) (26 years ago, 30-Dec-99, to lugnet.robotics.rcx)
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