GCBASIC

Does the LED work? Remove the code. try PULSEOUT with in the DO-LOOP. Do PULSEOUT PORTC.0, 100 ms wait 100 ms Loop If that then works, Do you have a Do: Loop at the bottom? Otherwise the chip will go to SLEEP. Also, why do you have EXT as the oscillator source ? Should be OSC.

You can only go to the editor... oops. Needs to be added.

I have closed and minimize options. So, this is a display issue.

The short answer is No. The language is not the determinating factor. The specific implementation of a language could be a 'good' or 'bad' implementation in terms of a specific microcontroller. As Great Cow BASIC is essentially as close to ASM as you can get... comparing to Arduinio C implementation is meaningless. They are like pears and apples - both are fruit but very different implementation of the same concept. So, that said. What are have you tried to implement your solution?

The normal 1602 should work for a 1604. The addressing will be handled. The 16x4 may just be missing from the Help.

I have closed and minimize options. So, this is a display issue.

You can only go to the editor... oops. Needs to be added.

I am guessing this is an old installation. The ADC library has been updated to resolve this issue. https://sourceforge.net/projects/gcbasic/files/Release%20Candidates/Patches/gcb%40syn/GreatCowBASIC/include/lowlevel/a-d.h/download This ADC library was corrected to specifically address your issue. Please download and replace the file in your GreatCowBASIC\include\lowlevel folder. Please let me know if this resolves.