ijpds formats.book - Kodak

Chapter 4. Record Formats
Start of Page (SOP)
Start of Page (SOP)
Byte Position Bytes Field Name Description
4 - 56 IJPDS Formats
The SOP record specifies the start of a new page and sets the starting
position to the top of the page. The X,Y coordinates are 0,0 for the top of
the page (upper left corner when looking at the substrate in the direction it
is moving). The current origin and cursor position are also set to 0,0 by
the SOP record. Refer to Chapter 1 for a discussion of pages, position
coordinates, origin, and multiple pages per document.
The SOP record should be used only if the document is longer than the
page buffer length. A long document should be divided among pages as
equally as possible for system efficiency.
1-2 2 Record Length The length of this record, in binary, including the record length
field. For example, hex 00 04 specifies a record length of 4 bytes.
3 1 Cyclic Record Count A binary cyclic record count using modulo 256. Each record in the
job is counted, starting with hex 01 for the first record. The 255th
record is hex FF and the 256th record is hex 00. This count is used
to verify record sequence.
4 1 Control Code A binary code that identifies the record type. A value of hex 20
identifies the SOP record.