Format of DOS parameter list:
Offset	Size	Description	)
 00h	WORD	AX
 02h	WORD	BX
 04h	WORD	CX
 06h	WORD	DX
 08h	WORD	SI
 0Ah	WORD	DI
 0Ch	WORD	DS
 0Eh	WORD	ES
 10h	WORD	reserved (0)
 12h	WORD	computer ID (0 = current system)
 14h	WORD	process ID (PSP segment on specified computer)
Note:	under Windows Enhanced mode, the computer ID is normally the virtual
	  machine ID (see INT 2F/AX=1683h), though this can reportedly be
	  changed by setting UniqueDOSPSP= in SYSTEM.INI