READ ATTRIBUTE 8Ch
Commands
115
MAM attribute data
Attribute data sent with a WRITE ATTRIBUTE command or returned in response to a READ ATTRIBUTE
command has the following format:
The format implies nothing about the physical representation of the data in the Medium Auxiliary
Memory.
7 6 5 4 3 2 1 0
0 (MSB)
Attribute Identifier
1 (LSB)
2 Read-Only Reserved (0) Format
3 (MSB)
Attribute Length (n−4)
4 (LSB)
5 (MSB)
Attribute Value
n (LSB)
Attribute Identifier The binary identifier for a single attribute. See “Attribute ID values” on page 116
for a description of attribute ID values.
Read-Only
Specifies whether an attribute is read-only. The bit is ignored by the READ
ATTRIBUTE
command.
0 The attribute may be changed by the WRITE ATTRIBUTE command.
1 The attribute cannot be changed by WRITE ATTRIBUTE.
Format Specifies the data format of the attribute. The possible values are:
Value Description
00b Binary. The attribute contains binary data.
01b ASCII. Attributes contain only graphic codes (code values 20h–7Eh). It
must be left-aligned and contain 20h (ASCII space) in any unused bytes.
10b Text. The attribute contains textual data. The character set is as
described in the Text Localization Identifier attribute in “Standard host
type attributes” on page 118.
11b Reserved.
Attribute Length The length in bytes of the Attribute Value field.
