 | | Memory
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I intend to implement some reinforcement learning algorithms with the RCX. My program is running big. Im using legOS 0.2.3 how many memory does it uses? Im using all sensors. How many is left for me. THe size of the *.lx file is the size I should (...) (25 years ago, 2-Mar-00, to lugnet.robotics.rcx.legos)
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| | LNP-Packets
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I need to use the comunications with VC++ and Im going to do that. Can anyone tell the exact meaning of the following blocks. |F0|LEN| IDATA |CHK| |F1|LEN|DEST|SRC| ADATA |CHK| F0 and F1 is just a simple bit like 0 for F0 and 1 for F1? CHK is (...) (25 years ago, 2-Mar-00, to lugnet.robotics.rcx.legos)
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| | Re: malloc() bug found -- BAD MEMORY REGION :-(
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Great! Well done, Martin! Toni "Martin Cornelius" <Martin.Cornelius@t-online.de> wrote in message news:38BDC2FD.85668C...line.de... (...) (25 years ago, 2-Mar-00, to lugnet.robotics.rcx.legos)
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| | Re: malloc() bug found -- BAD MEMORY REGION :-(
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(...) My hangups are gone too! Danke! Jürgen (25 years ago, 2-Mar-00, to lugnet.robotics.rcx.legos)
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| | Re: malloc() bug found -- BAD MEMORY REGION :-(
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(...) Great! (...) This has always been a problem- it was an issue with firmdl before dll. Nothing serious, so it was never fixed. (...) You've actually had programs that large? Wow. -Luis (trying to make this more than a one-sided conversation...) (...) (25 years ago, 2-Mar-00, to lugnet.robotics.rcx.legos)
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| | Re: malloc() bug found -- BAD MEMORY REGION :-(
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(...) made some tests, and - Yep, it works ! I'd strongly encourage everybody experiencing strange hangups to apply the little fix to mm_init() i suggested. For me, it makes malloc() and dll work perfectly. BTW, there are some minor flaws in dll[x], (...) (25 years ago, 2-Mar-00, to lugnet.robotics.rcx.legos)
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| | malloc() bug found -- BAD MEMORY REGION :-(
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It looks like it's not a bug in legOS, but in the RCX hardware: Memory from 0xfb80 to 0xfd7f is simply NOT WRITEABLE, or more exactly, always read as 0xff, at least on my RCX ! Try the following little test: // // memory test // #include <conio.h> (...) (25 years ago, 1-Mar-00, to lugnet.robotics.rcx.legos)
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| | malloc() bug haunt: getting closer..
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Yesterday evening i found something, that might be the reason for some of the crashes reported lately: The chain of memory blocks used by malloc() has a broken entry, say: the reserved block at 0xfd7c has a length word of 0xfffe. This will cause (...) (25 years ago, 1-Mar-00, to lugnet.robotics.rcx.legos)
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| | Re: Odd behavior
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(...) afaik, with vanilla legOS-0.2.3, lnp_addressing_write and lnp_integrity_write are not thread-safe, there is a little patch fixing this in the lnpd tarball. (25 years ago, 29-Feb-00, to lugnet.robotics.rcx.legos)
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| | Never mind
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Well, my so-called "working" program crashed again, after adding two sleep statements and two sound calls, neither of which my program actually got to. So, I guess there are other causes behind my hangs as well. Ah the joys. :) -- "Though I am not (...) (25 years ago, 29-Feb-00, to lugnet.robotics.rcx.legos)
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