Some parts of the schematic are based on other open-source schematics.
FDC: http://www.malinov.com/Home/sergeys-projects/isa-fdc-and-uart
CPU and BIOS: https://github.com/skiselev/micro_8088
XT-IDE: http://www.vcfed.org/forum/showthread.php?29202-XTIDE-Rev2