GlaBIOS is an open-source GPLv3 alternative BIOS for XT clones, available from https://glabios.org/
The MDA font is in the form offered at https://github.com/viler-int10h/vga-text-mode-fonts i.e. it's 256 lots of 14 bytes, the first 14 being the content of character 0, the next 14 being the content of character 1, etc.