INT E0 - ConcCP/MConcurrent CP/M by Digital Research, now DR Multiuser DOS,DR Multiuser DOS,REAL/32 - "S_OSVER" - GET OS VERSION
	CL = A3h
Return: AX = operating system version (see #04023) (see also INT 21/AX=4451h)
SeeAlso: INT E0/CL=0Ch,INT 21/AX=4451h