Doesn't appear to be a PC - attempt to boot a DOS
floppy results in silence (machine sucks on it for a
while, then goes into la-la land).
Grumble.
You deserve better. I have a desktop Micro-A here*
that I can look into for more information. Mine is very
much a PC booting OS/2 and doesn't even segue into
MCP unless you issue the magic commands.
I believe 99% that mine would boot a MSDOS floppy
if given it, but haven't tried.
John A.
*orbiting the outer ring of NYC