Emerson MVME147 manual +$04

					Attach/Detach Packet (all devices)
	+$04	0		0		Number of Tracks
	+$06	0		0		Minimum Read Transfer
	+$08	0		0		Minimum Write Transfer
	+$0A	0		0		Streaming Count
	+$0C	Speed Code				Density Code
	+$0E	0		0		0	0
	+$10			SCSI Tape Attributes
	+$12	Controller Type				Drive Type
	+$14	0		0		Function Code (6C)
	+$16	Interrupt Level				Vector Number
	+$18	Status Byte 2				Status Byte 3 (Note 1)
	+$1A	0		0		Retry Count
	+$1C	Physical Bytes per Block (0 for Variable) (Note 2)
	+$1E		+$20			Pointer to RAM	+$22
						Work Area
						(MSW)
	Pointer to RAM		+$24			Logical Bytes per	+$26
	Work Area					Block (0 for
	(LSW)					Variable) (Note
						2)
$00		00000xxx				Controller logical unit
						number
$01		00000xxx				Device logical unit
						number
$02		xxxxxxxx				Status from SCSI
						firmware (byte 0)
						(Note 1)
$03		xxxxxxxx				Status from SCSI
						firmware (byte 1)
						(Note 1)
$04		00000000				Reserved
$05		00000000				Number of tracks on
						media (not used by
						all
						controllers

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