Format of TI Professional PC extra system configuration information:
Offset	Size	Description	)
 -3	WORD	memory size in paragraphs
 00h	BYTE	drive type byte (see #03206)
 01h	WORD	extra system configuration word 1
		bit 0: 8087 is present
		bits 15-1: reserved (0)
 03h	WORD	extra system configuration word 2
		bits 15-0: reserved (0)