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Chapter 4. Record Formats<br />
Set Font and Spacing (SFS)<br />
Set Font and Spacing (SFS)<br />
The SFS record specifies a font and spacing values.<br />
4 - 38 IJPDS Formats<br />
The font identified in this record can be a regular or super font. It becomes<br />
the current font and remains in effect until another SFS record or an SOD,<br />
SDC, SFI, or SFT record is received.<br />
The SFS record sets all line and character spacing values to those<br />
contained in the spacing fields in this record. These become the current<br />
spacing values and remain in effect until another SFS record or an SOD,<br />
SDC, SFI, or SFT record is received.<br />
Byte Position Bytes Field Name Description<br />
1-2 2 Record Length The length of this record, in binary, including the record length field.<br />
For example, hex 00 16 specifies a record length of 22 bytes.<br />
3 1 Cyclic Record Count A binary cyclic record count using modulo 256. Each record in the<br />
job is counted, starting with hex 01 for the first record. The 255th<br />
record is hex FF and the 256th record is hex 00. This count is used<br />
to verify record sequence.<br />
4 1 Control Code A binary code that identifies the record type. A value of hex 31<br />
identifies the SFS record.<br />
5 1 Font Number A binary number that identifies the font or super font to be selected.<br />
The range is 0 - 254. For example, hex 0A specifies a font number<br />
of 10.<br />
6 1 Reserved This field is not used and must contain all binary zeroes.<br />
7-10 4 X Line Spacing A signed binary number that is added to the X Escapement<br />
specified in the font record to determine the starting X position of<br />
the next line relative to the starting X position of the current line.<br />
The X line spacing moves relative to the direction of the font.<br />
Negative values are represented using the two's complement form.<br />
For example, hex 00 00 00 08 specifies +8 dots hex FF FF FF F8<br />
specifies -8 dots.<br />
11-14 4 Y Line Spacing A signed binary number that is added to the Y Escapement<br />
specified in the font record to determine the starting Y position of<br />
the next line relative to the starting Y position of the current line.<br />
The Y line spacing moves relative to the direction of the font.<br />
Negative values are represented using the two's complement form.<br />
For example, hex 00 00 00 1B specifies +27 dots and hex FF FF FF<br />
E5 specifies -27 dots.<br />
15-18 4 X Character Spacing A signed binary number that is added to the X Escapement<br />
specified in each character record to determine the starting X<br />
position of the next character cursor relative to the starting X<br />
position of the current character cursor. The X character spacing<br />
moves relative to the direction of the font.<br />
Negative values are represented using the two's complement form.<br />
For example, hex 00 00 00 16 specifies +22 dots and hex FF FF FF<br />
EA specifies -22 dots.<br />
19-22 4 Y Character Spacing A signed binary number that is added to the Y Escapement<br />
specified in each character record to determine the starting Y<br />
position of the next character cursor relative to the starting Y<br />
position of the current character cursor. The Y character spacing<br />
moves relative to the direction of the font.<br />
Negative values are represented using the two's complement form.<br />
For example, hex 00 00 00 1B specifies +27 dots and hex FF FF FF<br />
E5 specifies -27 dots.
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