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Atapi commands – Quantum Audio Travan 40 Tape Drive STT3401A User Manual

Page 36

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Chapter 5

ATAPI Interface

Page 28

Seagate Travan 40 Product Manual

Pin

Assignment

Description

Source

21

DMARQ

DMA Request

Device

22

GND

Ground

N/A

23

DIOW-

I/O Write

Host

24

–REQ

Ground

N/A

25

–I/O

I/O Read

Host

26

GND

Ground

N/A

27

IORDY

I/O Ready

Device

28

CSEL

Cable Select

Device

29

DMACK

DMA Acknowledge

Host

30

GND

Ground

N/A

31

INTRQ

Interrupt Request

Device

32

10CS16-

16-Bit I/O

Device

33

DA1

Device Address Bit 1

Host

34

PDIAG

Passed Diagnostics

Device

35

DA0

Device Address Bit 0

Host

36

DA2

Device Address Bit 2

Host

37

CS0-

Chip Select 0

Host

38

CD1-

Chip Select 1

Host

39

DASP-

Device Active or Slave
Present

Device

40

Ground

Ground

N/A

ATAPI commands

This section describes the ATAPI commands as implemented by the STT2401A and
ST3401A. The table below lists the commands in the order of their Operation Code,
and identifies the page number where the command is described in this manual.

Op Code (Hex)

Command

See Page

00

TEST UNIT READY

84

01

REWIND

80

03

REQUEST SENSE

73

08

READ

67

0A

WRITE

86

10

WRITE FILEMARK

89

11

SPACE

82

12

INQUIRY

31

13

VERIFY

85

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