Quantum Audio STT3401A Manuel D’Utilisation

ATAPI Interface 

Page 98 

Seagate Travan 40 Product Manual 

 

This command allows an ATAPI (not ATA) device to report its capabilities to the 
Host. 

The data returned are very extensive and detailed. Please refer to the ATA-4 
document for complete details. Many details that are not relevant to this device have 
been omitted. 

The result data returned to the Host will always be 512 bytes long. 

Some parameters are defined as 32-bit values (e.g., words 57 and 58). Such fields 
are transferred using two word transfers. The device shall first transfer the least 
significant bits, bits 15 through 0 of the value, on (bus) bits DD (15:0) respectively. 
After the least significant bits have been transferred, the most significant bits, bits 31 
through 16 of the value, shall be transferred on DD (15:0) respectively. 

Some parameters are defined as a string of ASCII characters. For the string 
“Copyright,” the character “C” is the first byte; the character “o” is the 2

nd

 byte, etc. 

When such fields are transferred, the order of transmission is: 

1.  The 1

st

 character (“C”) is on bits DD (15:8) of the first word 

2.  The 2

nd

 character (“o”) is on bits DD (7:0) of the first word 

3.  The 3

rd

 character (“p”) is on bits DD (15:8) of the second word 

4.  The 4

th

 character (“y”) is on bits DD (7:0) of the second word 

etc. 

Features 

N/A 

N/A 

Sector Count 

N/A 

N/A 

Sector 
Number 

N/A 

N/A 

Byte Count 
High 

N/A 

N/A 

Byte Count 
Low 

N/A 

N/A 

Device/Head 

rsvd 

LBA 

rsvd 

DEV 

SAM LUN (not used) 

 

Command 

command 

A1