 | | Re: JRM code and Reset
|
| 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)
| | | | | 0x8000 and main()
|
| 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)
| | | | | Re: 0x8000 and main()
|
| 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)
| | | | | Re: 0x8000 and main()
|
| 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)
| | | | | Re: 0x8000 and main()
|
| 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)
| | | | | Re: 0x8000 and main()
|
| 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)
| |
