Card reader, card punch interface

Offset	Bytes in Length	Field Name	Description
16(10)	1	DCBMODE, DCBSTACK
			Code
		1000 ....	C Column binary mode.
		0100 ....	E EBCDIC mode.
		.... xxxx	Stacker selection.
		.... 0001	1 Stacker 1.
		.... 0010	2 Stacker 2.
		.... 0011	3 Stacker 3.
17(11)	1	DCBDEVT	Device type.
		0100 ....	Device class is unit record or TSO terminal.
		0100 0001	2540 Card Reader
		0100 0010	2540 Card Punch
		0100 0100	2501 Card Reader
		0100 0110	3505 Card Reader
		0100 1100	3525 Card Punch