Bitfields for Chips&Technologies chip type:
Bit(s)	Description	)
 7-4	chip type
	0000: 82c451
	0001: 82c452 / 82c452A
	0010: 82c455
	0011: 82c453
	0100: 82c450
	0101: 82c456
	0110: 82c457
	0111: F65520
	1000: F65530 / F65525
	1001: F66510
	1010: ???
	1011: F64300 "Wingine DGX"
	1100: F65535/F65545 ???
	1101: F65540
	1110: ???
	1111: ???
 3-0	revision number
SeeAlso: #00177