Bitfields for EPP BIOS mode bits:
Bit(s)	Description	)
 0	set compatibility mode
 1	set bi-directional mode
 2	set EPP mode
---Revision 7,v3.0---
 3	set ECP mode
 4	set EPP software emulation
 5	set fast Centronics mode
 6-7 reserved (0)
SeeAlso: #00632,#M0053