HP PCL 5 Comparison Manual page 42

Table 2-3. PCL Feature Additions for HP LaserJet 4 (continued)
Feature/Command
Status Readback
Location Type Command
Location Unit Command
Inquire Entity Command
Flush All Pages Command
Free Memory Command
Echo Command
Bezier Curve Commands
Label Origin
Fill Polygon
Macros
Configuration Command
2-6 Printer-Specific Differences
Support
New Feature The addition of 6 new status readback commands enable
the user to receive certain information back from the
printer about fonts, symbol sets, macros, user-defined
patterns, and available memory.
New Used to specify a status readback type of location
(current, all, internal, downloaded, cartridge, SIMMs).
New Specifies a status readback location unit (all, temporary
or permanent, highest-lowest priority, specific SIMM).
New Requests the status from the location (type and unit)
specified for fonts, symbol sets, macros, or user-defined
patterns.
New Allows the user to clear page data from printer memory.
New This command returns the current available memory.
New Allows the user to send a unique ID number to the
printer to be used as a "place holder."
New HP-GL/2 commands (relative and absolute) that allow a
user to draw complex curves with less data required
than that required for arcs.
Modified Label position LO 21 is provided for correct alignment of
HP-GL/2 text with PCL text.
Modified Previously, the HP-GL/2 Fill Polygon command filled
polygons using the odd/even fill technique. A second
technique, non-zero winding fill, has been added.
Modified HP-GL/2 is now supported in macros.
New Added to allow the user to communicate with the MIO
card in the printer.
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