 | | Re: Turning the RCX off and on again (was: New pbForth 2.1.0 (and firmware speed))
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(...) If you have the new version 2.1 the POWER-OFF word via terminal to shut off and the red button to power on works fine. If you have an earlier version (1.2x) you have to use the words RCX_INIT and POWER_INIT to initialize the brick and the (...) (23 years ago, 11-Apr-02, to lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | Turning the RCX off and on again (was: New pbForth 2.1.0 (and firmware speed))
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Mario, i'm interested in pbForth example scripts, too. Furthermore, the "supervisor" you suggested could be the answer to one of my questions in (URL) concerning turning the RCX off and on without loosing pbForth: 2) According to Knudsen, i have to (...) (23 years ago, 11-Apr-02, to lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | LEGO Satellite Uplink
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Imagine what happens when a TV truck pulls up to a crime scene and the technician has to establish a Satellite Uplink for his live news feed. My latest project is a LEGO Dish that is motor driven, both in azimuth and elevation. It scans back and (...) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | Interesting robotics article at Wired.
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Hey folks, Just read this and thought it was interesting enough to pass on. Not exactly Lego related but it might give some people ideas on directions to build in. (URL) Baydar bbaydar@hfx.eastlink.ca (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | Re: New pbForth 2.1.0 (and firmware speed)
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Thanks Ralph, this is great news. I just got the new USB tower, and considering my revived interest for pbForth your new version arrives really at the right time. What IMHO would really boost the spreading of pbForth, is the availability of some (...) (23 years ago, 10-Apr-02, to lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | RE: SpyBots @ Amazon
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At the risk of digressing and sounding horribly stupid, has there been any (pseudo-/semi-)official word yet on the computer type/capabilities of the SpyBots? Andrew Burton phone. (334) 876-9259 email. superboy@wccs.cc.al.us (...) (URL) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | New pbForth 2.1.0 (and firmware speed)
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For everyone that has been interested in firmware speed over the last few days, I am ready to announce the latest version of pbForth. This version supports the USB tower under Windows!!!! (URL) An empty loop of 20,000 interations takes less than 1 (...) (23 years ago, 10-Apr-02, to lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | Re: Light Sensor help
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"Steve Baker" <lego-robotics@crynwr.com> wrote in message news:3CB39250.8CC16B...ail.net... (...) what (...) you (...) storage (...) If you need to use a lookup table where you know the values of the table at compile time, using a case statement (...) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | Re: RCX Firmware Speed
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Dick, Nice post, and an iteresting topic. My timings differ a little for v2.0 beta, but they are basically the same. My timings use an interal timer as do yours. My multi-task measurement shows that the 3mS framework does not apply to every (...) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | Re: RCX Firmware Speed
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Firstly, thanks very much for that detailed answer. That was exactly the information I was looking for. Somewhere in the thread it was suggested that each task gets one opcode executed every 3ms, actually, as you show, they all get one opcode (...) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | Re: Light Sensor help
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(...) 16 MHz AFAIK, and I bet it could go much faster, at the price of a less reproducible timing. leJOS executes some tens of Java bytecodes per millisecond, an empty 10000 iterations loop containing four relatively simple byte codes runs in 1.4 (...) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | RCX Firmware Speed
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This is a follow up to many of the recent posts on the speed of Lego's RCX byte code interpreter. It's a long post but the salient items are in the first few paragraphs. The interpreter is very slow because of all the overhead required to execute a (...) (23 years ago, 10-Apr-02, to lugnet.robotics) !
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| | Re: Light Sensor help
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(...) Hrm. Looks like I need to be more thorough with my multi-task timing tests... my results (which seemed to show only one task getting run in any given timeslice) differ from yours. Unfortunately, I didn't keep good notes of all my measurements, (...) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | SpyBots @ Amazon
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The upcoming SpyBots are listed for preorder at Amazon. No pictures yet, but the names and a short description are given for each. MSRP looks to be $60 each. Check it out: (URL) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | RoboLab newsgroup page updates
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The RoboLab newsgroup page (URL) some updating. The first two links on the left pane don't work anymore. The following two links should replace those first two links: Tufts RoboLab site (URL) or (URL) Education (Dacta) RoboLab site (URL) Pitsco site (...) (23 years ago, 10-Apr-02, to lugnet.admin.suggestions, lugnet.robotics.rcx.robolab, lugnet.dacta)
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| | RoboLab updates
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If you only read the Robolab newsgroup then you may have missed a helpful post that did not appear in the RoboLab newsgroup. If so, then look at: "Robolab 2.5 patches" (URL) (23 years ago, 10-Apr-02, to lugnet.robotics.rcx.robolab)
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| | Re: Light Sensor help
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(...) Well, I can think of lots of reasons why you might want trig - if you know what direction you are moving in and how far you've travelled, trig will let you figure out where you are relative to where you started. Using an NQC lookup table isn't (...) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | Re: Light Sensor help
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Yuck How much time is the brick spending sleeping then? Roland (...) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | Re: Light Sensor help
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(...) Yes, it all appears to be synchronous. However, only one bytecode instruction is run in any given 3ms; any active tasks interleave their instructions. If you have two tasks running, they will each be getting an instruction every other 3ms. If (...) (23 years ago, 10-Apr-02, to lugnet.robotics)
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| | Re: Light Sensor help
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"T. Alexander Popiel" <lego-robotics@crynwr.com> wrote in message news:20020409200644....eep.com... (...) time (...) loop (...) I did some similar tests and found similar results. The results held up well up to about 3 tasks, but by the time we (...) (23 years ago, 9-Apr-02, to lugnet.robotics)
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