Bitfields for CiriSOFT characteristics byte:
Bit(s)	Description	)
 0-2	type
	000 normal program (with PSP)
	001 upper XMS memory block (needed HIMEM.SYS function to free memory
	      when uninstalling)
	010 device driver (*.SYS)
	011 device driver in EXE format
	1xx others (reserved)
 3-6	reserved
 7	set if extra_table defined and supported (see #02591)
SeeAlso: #02588