Specifications

8-19
User Patterns and Disk Operation
Disk Operation
Header String
A fixed string which must be present in a pattern file for that file to be considered valid.
The suggested string is “HP Pattern Store”.
Revision Code
An unsigned integer specifying which format is used to record the pattern information in
the file. This document specifies the first such format, revision 1, but this field allows
future changes to be indicated. It is reasonable to expect a given firmware release to read
all formats which pre-date it, but not those that post-date it.
Table 8-2 Disk Format of Unsigned Integer
Offset Description
0 first byte of integer (most significant)
1 second byte of integer
2 third byte of integer
3 fourth byte of integer (least significant)
Table 8-3 Disk Format of String
Offset Description
0
...
string length - 1
first 8-bit character of string
last 8-bit character of string
Table 8-4 Pattern Data Format
Offset Description
0
...
roundup (pattern length/8)-1
first byte of pattern data (most sig. bit first bit of pattern)
last byte of pattern (lower (patt_size MOD 8) bits zero)