Format of REAL/32 Assign Control Parameter Block (ACPB):
Offset	Size	Description	)
 00h	BYTE	ID of console to assign
 01h	BYTE	flag: if FFh, new process must have CNS as console for this
		  call to succeed
 02h	DWORD	-> process descriptor (see #04026) or 00000000h
 06h  8 BYTEs	name of process to search for if descriptor field above is zero