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 | | main() Reset -- THE SAGA ENDS !! ---
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| Fellow Lugnuts, Doe anyone want to purchase a 74HC244 (U5) that "kinda works" ? YES, YES, believe it or not, U5 was my problem !! The mystery is not totally solved, because even using both a logic probe and an o-scope, I cannot see any indication (...) (23 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
| | | | | Re: JRM code and Reset
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| Matt, The only mod I've made to my HB is to cut the motor power supply "+" trace and use a separate motor power supply. See my post/response to Dan for my explanation of that. After reading your START button question, I triple checked. I don't (...) (23 years ago, 3-Jan-02, to lugnet.robotics.handyboard)
| | | | | Re: JRM code and Reset
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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)
| | | | | Re: JRM code and Reset
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| Since it seems like everything else has been checked, I have one other suggestion after looking at my pcode source. If the "start" button on the HB is pressed during power on, the autostart will be disabled. Has your hardware been hacked at all, (...) (23 years ago, 2-Jan-02, to lugnet.robotics.handyboard)
| | | | | Re: JRM code and Reset
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| Wow, What a bugger! This is one of the strangest cases I've seen. Works fine while connected, but not when reset. Works fine on my board either way. Memory and 68HC11 have been traded out. Scope shows no voltage drop at Mem-power durring reset. Both (...) (23 years ago, 2-Jan-02, to lugnet.robotics.handyboard)
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