SCSI PACKETS

SCSI PACKETS

7

Introduction

Command packets for the SCSI functions are listed in Table 7-1. The command packets are described in detail in the following paragraphs.

 

 

 

Table 7-1. SCSI Functions

 

 

 

 

 

 

 

 

SCSI

 

 

 

 

 

 

 

 

 

 

 

FUNCTION CODE

 

DESCRIPTION

 

 

 

 

 

 

 

 

 

 

 

$00

 

Read (use new read, refer to $70 below)

 

 

 

 

 

$04

 

Write (use new write, refer to $74 below)

 

 

 

 

 

$08

 

Attach (use new disk attach, refer to

 

 

 

 

 

 

 

 

 

$78 below)

 

 

 

 

 

 

 

$0C

 

Detach (all devices)

 

 

 

 

 

$10

 

Format (with/without defect list)

 

 

 

 

 

$14

 

Assign Alternate Sector

 

 

 

 

 

$18

 

Reserved

 

 

 

 

 

 

 

$1C

 

Custom SCSI Sequence (refer to Chapter 2)

 

 

 

 

 

$20

 

SCSI Bus Reset

 

 

 

 

 

$24

 

SCSI Controller Reset

 

 

 

 

 

$28

 

Tape Attach (use new tape attach, refer

 

 

 

 

 

 

 

 

 

to $6C below)

 

 

 

 

 

 

 

$2C

 

Erase

 

 

 

 

 

$30

 

Rewind

 

 

 

 

 

$34

 

Read Block Limits

 

 

 

 

 

$38

 

Space (blocks, filemarks, sequential

 

 

 

 

 

 

 

 

 

filemarks, end of data)

 

 

 

 

 

 

 

$3C

 

Write Filemarks

 

 

 

 

 

$40

 

Verify CRC

 

 

 

 

 

$44

 

Tape Mode Select

 

 

 

 

 

$48

 

Tape Mode Sense

 

 

 

 

 

 

 

 

 

 

 

 

Page 81
Image 81
Emerson MVME147 manual Scsi Packets, 1.SCSI Functions, Introduction, Function Code, Description