Good News!
Kent Dickey has upgraded his KEGS emulator to partially support the VOC card. Interlaced mode only right now though which allows up to 512 colors per 320x400 screen.
Although interlaced mode requires a revised font driver, it is now possible to display up to 128 characters x 48 lines in monochrome mode.
Try it out now and give Kent your support. I will be extending my version of 65816 Forth to take advantage of the expanded screen.
MacOSX version only
OSX 10.13 and up required
http://kegs.sourceforge.net