ijpds formats.book - Kodak

Chapter 4. Record Formats
Start of Document and Cue (SDC)
4 - 28 IJPDS Formats
This record does not cause the printing system to generate a warning
message for positioning outside of the specified limits. Positioning is
caused by records such as SPO, SRP, and SPC, or by character and font
escapements. Warnings are generated only when data such as BOX or
IBM images or character bounding boxes are placed outside of the limits.
This record does not control whether or not the data is printed; it controls
only whether or not a warning message is issued. Data which falls entirely
in the buffer will always be printed. Data which falls entirely outside the
buffer will never be printed. What happens to data that is partly in the
buffer is printer and release dependent.
Start of Document and Cue (SDC)
The SDC record specifies the start of a document at the next cue and
contains general information about the document. The records that follow,
up to another SDC record or an SOD record, contain the image
information for this document.
Byte Position Bytes Field Name Description
This record causes the start of a new page. Refer to Chapter 1 for a
description of documents and pages.
For a multi-RIP system, there must be an SDC or SOD record for each
document on each RIP.
The font and ILS specified in this record become the current font and ILS
and remain in effect until these values are specified by another record.
1-2 2 Record Length The length of this record, in binary, including the record length
field. For example, hex 00 18 specifies a record length of 24 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 05
identifies the SDC record without security. A value of hex 11
identifies the security version of the SDC record.
5-6 2 Vertical Space This field is used only for the KODAK VERSAMARK DS2900 printing
system and should be binary 0 for all other systems.
An unsigned binary number that specifies the number of dot rows
of vertical space to generate.
7-10 4 Document Counter A document count, in binary, that identifies this document. The
count starts at 1 (hex 00 00 00 01) for the first document and is
incremented by 1 for each following document. This count is used
to verify document sequence.
11-12 2 User Output Signals This field is used to activate user output signals at the printing
system. The signals available are printing system dependent.
Each bit represents one output signal. The associated output
signal is activated when the bit is set to 1 and deactivated when
the bit is set to 0.
13 1 Starting Font Number A binary number that identifies the starting font in this document.
The range is 0-254. For example, hex 02 specifies a font number
of 2.