pdurlej wrote:
Nope. The closed source IBMBIO.COM is a component of PC DOS and, AFAIK, is not redistributable.
Additionally, AFAIK, there was not any opensource (or even redistributable) counterpart of IBMBIO.COM (IO.SYS in MS-DOS naming convention).
Strictly speaking IBMBIO.COM / IO.SYS is not part of the OS, as it provides and abstraction layer and interface to the firmware (BIOS). In theory you could run DOS on a non-IBM-PC compatible if you provide an IO.SYS for that machine (never happened as far as I know). All the rest is Open Source (including MSDOS.SYS and FORMAT etc.), so I think MS-DOS 2.0 is indeed Open Source. Regardless your IO.SYS implementation is cool, it is good we have an Open Source alternative for that too!
Cheers,
bzt