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I've never worked with the GameBoy's sound hardware, but adding this feature seems easy enough. There's a standard function to read an expression, which greatly simplifies things. It's all just a matter of adding two more, and then acting on them... but it's never that simple. One issue is that GBBA...

I fixed the bug where it would crash on empty lines, so now TESTIT.BAS works without modification.

I haven't been able to get SHAPES.BAS to work at all, though.
It produces a syntax error on line 60.

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Here's a fixed version of GBBC that I made: Download

It's kind of a buggy program, but that's not really my fault.

Alright, I've managed to get the sine wave demo that was included with GBBC to both convert and run. So you know, I'm using "GBB108.GB" Here's about how the file is laid out (as converted from text by GBBC): - $00-02: Magic number (ASCII) 'BF0' (last character is the number zero) - $03-03:...