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Format of SyQuest SCSI structure

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Offset Size Description

00h

WORD

 opcode (see #00287)

02h

BYTE

 target's SCSI ID

03h

BYTE

 target's logical unit number

04h

BYTE

 data direction
00h = no data xfer
01h = data in
FFh = FFh data out

05h

BYTE

 host status
00h = successful
01h = selection time out
02h = data over-run or under-run

06h

BYTE

 target status at command completion
00h = successful
02h = check status
08h = busy

07h

BYTE

 command data block length

08h

DWORD

 request data length

0Ch

DWORD

 result data length (actual length of data transferred)

10h

DWORD

 CDB (see #03236,#03237,#03238)

14h

DWORD

 data buffer

Note:

The handler does not perform a 'Request Sense' command if there was an error.