Merge pull request #44 from markadev/force-monochrome-color-text

Add option to always use the monochrome text color

Merge pull request #39 from markadev/abaffa-videx-compatibility-mode

Integrate in "Videx compatibility" from abaffa's changes

Merge pull request #33 from markadev/configurator

Check in the menu-based configuration program

Merge pull request #25 from markadev/reset-detection

Improve reset detection

Update picture with better lighting and focus

Merge pull request #18 from markadev/rev-b-hardware

Revision B hardware

Add a register to choose colors in soft-monochrome mode

Fix CPU reset detection

This fixes the card inadvertently resetting and switching
to text mode between levels in Stellar 7.

I think this happens because Stellar 7 uses the ROMs as randomness for the
warp sounds and if it happened to read the reset vector address then it would
have triggered this bug.

Thanks to @dhgoss for reporting!