Port Monitor 0.01
Author: Dan Englender
Platform: TI-84 Plus (may or may not work on 83P)

Sorry for the crap code and crap documentation, but I was in a hurry and this app was not the main focus.  It should work.  

"Setup Hook" records port data through the USB hook. 

"Setup Int" records data through an IM2 interrupt (will only take a new sample if a port in the requested range has changed). 

"Disable Mon" will Stop either the interrupt or hook monitor. 

"Exec Code" allows you to execute a BCALL or hex code or program, presumably while one of the monitors is running.  

"View Data" allows you to view all the data by sample. 

"View Changes" allows you to view the data by port, only showing ports that had data changes. 

In future revisions I may add more monitor triggers through other hooks. 

It doesn't read from ports 82 or A0, as these will cause problems with USB activity. The interrupt doesn't read from ports 8C or 8D because these are just counter ports and throw off the sampling.