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

[b]T&E Engineer said...(trimmed)[/b]


[b]However, I did run my code (attached) and IT DID WORK as expected.[/b]  

 
WHAT DOES THIS MEAN?

 

It first tells me that something on the Parallax Professional Development Board is not making contact. Normally I seem to have no problems programming it on the PDB (or separate solderless breadboard) and can even send HIGH and LOWs to the on board LEDs/resistors. 
It seems you didn't get the 8255 Stuff working, but you say the code worked as expected.  Unless I am misunderstanding I am wondering how you came to that conclusion that the code is working if the 8255 isn't working right?  Also, at 50 MHz on an SX28 do you have the recommended capacitor(s) on the Crystal/Resonator?  At 50 MHz for stable operation we recommend a 33 pF capacitor on the OSC2 pin when using the resonator we have.[/quote]

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