MS-DOS 3.20

Added support for 3.5 "DD 720KB drives. Images with the HDK extension (Epson) and self-extracting .exe (unknown). Amstrad MS-DOS - a special version of MS-DOS, which is designed to work on the Amstrad PC 1640. This 360K disk image (works on VirtualPC). Was released in January of 1986 (1987?)