ABC 6-2x and ABC 6-3x drive table

Drive	Offset	Default	Description
	00	08/10	DR0 offset
SF	01	2C	Card select address
	02	04	Cluster size
MF	03	2D	Card select address
	04	04	Cluster size
HD	05	24	Card select address (not accessable)
	06	20	Cluster size
unused	07	25	Card select address
	08	01	Cluster size

UFD-DOS drive table.
Table is variable lenght and it ends when drive name is 0000h.

	Offset	Description
Header	00	DR redirection offset
	01	(unused)
	02-03	DR drive name
First drive	04	Card type and select address
	05	Cluster size and addressing type
	06-07	Name
Second drive	08	Card type and select address
	09	Cluster size and addressing type
	0A-0B	Name
And so on..	...
Last drive	XX+00	Card type and select address
	XX+01	Cluster size and addressing type
	XX+02	Name
Terminator	XX+04	Undefined
	XX+05	Undefined
	XX+06	Zero (name)

Card select address is coded as follows

Bit #	Description
07-06	Controller type: 00 W5/W8 Winchester 01 A6/A8 ABC 832, ABC 834, ABC 838 or DD88 10 A5 ABC 830 11 A6/A8 fast
05-00	Card select address (0-63)

Cluster size is coded as follows

Bit #	Description
06	Addressing type: 0 Linear 1 Biased
05-03	Reserved
02-00	Cluster size: 000 1 001 2 010 4 011 8 100 16 101 32 110 64 111 128