In SX Microcontrollers, SX/B Compiler and SX-Key Tool, richwhip wrote:

I've been running code on a Parallax SX-28 proto board for some time without problems.  I purchased the SX-48 proto board from Parallax and started converting programs.  I made the appropriate changes to the code.  Even with the simplest LED blinker, I ran into erratic behavior.  It would blink a few times then go yaya, blinking erratically or not at all.  Nothing seems repeatable.  The debugger would lock up so it proved useless.  At 50MHz it hardly worked at all; at 4MHz internal it was better behaved.  Removing the SX-Key Tool seemed to help so I moved to a UART program.  At 4 MHz it appeared to work, but at 50 MHz it would print a few lines and go yaya.  Attached is the code for both programs.  If anyone has any ideas, I would appreciate their insight.

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