12.APPENDIX E: Medium Auxiliary Memory Attribute

The READ ONLY bit indicates whether the attribute is in the read only state. If the READ ONLY bit is one, the attribute is in the read only state. If the READ ONLY bit is zero, the attribute is in the read/write state.

The FORMAT field (Table 12-4) specifies the format of the data in the ATTRIBUTE VALUE field. ATTRIBUTES defined by this standard include a requirement for the contents of the FORMAT field.

 

 

Table 12-4: MAM attribute formats

 

 

 

 

Format

Name

 

Description

00b

BINARY

 

The ATTRIBUTE VALUE will contain binary data.

01b

ACSII

 

The ATTRIBUTE VALUE field will contain only graphic codes (i.e.

 

 

 

byte code values 20h through &Eh), will be left-aligned placing any

 

 

 

unused bytes at the highest offset in the field, contain 20h (i.e. ASCII

 

 

 

space) in any unused bytes.

 

 

 

 

10b

TEXT

 

The attribute contains textual data. The character set is as described

 

 

 

in the TEXT LOCALIZATION IDENTIFER attribute.

 

 

 

 

11b

Reserved

 

 

The ATTRIBUTE LENGTH field specifies the length in bytes of the ATTRIBUTE VALUE field. Attributes defined by this standard include a requirement for the contents of the ATTRIBUTE LENGTH field.

The ATTRIBUTE VALUE Field contains that current (READ ATTRIBUTE) or desired (WRITE ATTRBUTE) value of the attribute.

12.4.2.Attribute Identifier Values

The values in the ATTRIBUTE IDENTIFIER field are assigned according to the attribute type and whether the attribute is standard or vendor unique (Table 12-5).

Table 12-5: MAM attribute identifier range assignments

Attribute Identifiers

Attribute Type

Standardization

0000h

– 03FFh

Device

Yes

0400h

– 07FFh

Medium

Yes

0800h

– 0BFFh

Host

Yes

0C00h – 0FFFh

Device

Vendor Unique

1000h

– 13FFh

Medium

Vendor Unique

1400h

– 17FFh

Host

Vendor Unique

1800h

– FFFFh

Reserved

 

Drive will accept and process a WRITE ATTRIBUTES command containing standardized host type attribute identifier values (i.e. 0800h-0BFFh) or vendor unique host type attribute identifier values (i.e., 1400h-17FFh). Standardized host type attribute identifier values may be checked for conformance to the requirements described later.

12.4.3.Standard Device Type Attributes

Device types attributes (Table 12-6) will be maintained and updated by the drive when the medium and associated medium auxiliary memory are present. All supported medium type attributes will have a status of read only.

SONY AIT-5 drive SDX-1100V series Ver.1.0

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Sony SDX-1100V/R manual Attribute Identifier Values, Standard Device Type Attributes, MAM attribute formats