 | | Re: JRM code and Reset —John R. McDaniel
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| | | Dan, Yes, I did cut the trace for external motor power. I know the HB and the motor power "+" sources are isolated because I not only checked with a VOM, but I removed the motor supply batteries and when I run my motor test program (remember, no (...) (23 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | | | | Re: JRM code and Reset —Dan Gates
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| | | | John, I just did the same test, I think what Fred was saying is that IC sets the 0x8000 to accept a startup program if one is loaded. If I poke a 0 to that address then load any program it sets back to 1. I think he was wandering if your IC version (...) (23 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | | | | | 0x8000 and main() —John R. McDaniel
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| | | | Dan, Perhaps I'm misinterpreting what you mean by "a startup program". To me, a "startup program" means there is a file downloaded to the HB that contains a " main() " function, i.e., a function which will automatically be executed upon startup (...) (23 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | | | | | Re: 0x8000 and main() —Dan Gates
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| | | | John, I think it lies in the Pcode, in other words if the pcode sets the 0x8000 to 1 then any program loaded that has main() in it will auto run at startup. If the pcode does NOT set 0x8000 to 1 then no matter what you have loaded as a program it (...) (23 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | | | | | Re: 0x8000 and main() —Fred G. Martin
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| | | | I don't think this is quite it -- IC sets the byte if there's a main fcn. It also sets up some code so that main fcn gets run. Fred (...) (23 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
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| | | | | | Re: 0x8000 and main() —John R. McDaniel
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| | | | Fred and Dan, For some reason, I'm apparently having trouble explaining my findings, doing something wrong -- or not understanding what Fred is telling me. Now that my HB runs " main() " functions just fine upon powerup reset, I did my experiment on (...) (23 years ago, 5-Jan-02, to lugnet.robotics.handyboard)
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| | | | | | Re: 0x8000 and main() —John R. McDaniel
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| | | | Fred, Dan, and Chuck, Thanks to an email from Chuck McManis (thanks, Chuck), I now have a better understanding of what's going on with respect to the main() function and memory location 0x8000. Chuck asked me if the main() function is executed after (...) (23 years ago, 6-Jan-02, to lugnet.robotics.handyboard)
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