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mGB - Nintendo Gameboy MIDI control for Arduinoboy

Results 13 mGB issues
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Running v1.3.3 on a GBC using EZ Flash Jr. See attached image v1.3.2 works fine. ![mgberror](https://github.com/trash80/mGB/assets/42944910/52616ca9-48cd-4885-a6c8-692f657eed2f)

Would it be possible to implement custom wavetable shapes? LSDj has an editor, at least, (I only know this because I've seen its features, I haven't actually used it), and...

Cartridge type at 0x147 is set to 2. Should be 3 for MBC1+RAM+BATTERY. This prevents preset persistence on some cartridges.

This option will set the cartridge type as `ROM+MBC1+RAM+BATT ` which is needed for presets to save properly and persist a reboot: See: https://github.com/darconeous/sdcc/blob/master/support/makebin/makebin.c#L129-L143

Fixes https://github.com/trash80/mGB/issues/8

Fixes https://github.com/trash80/mGB/issues/5

I am finding building the rom using the master branch with the new make process using SDCC results in this issue. Notes above G# 5 all play C2 on channels...

This byte should be set to `0x80` for CGB support. This is done by `make_mgb.bat` by passing `-Wl-yp0x143=0x80` to lcc, but it doesn't seem to be done at all with...