HP 1600 - Manual (Page 68)

Introduction to host-based printing
The HP Color LaserJet 1600 printer is a host-based printer. Host-based printing differs from PCL printing
by computing the print job on the host computer, rather than computing the print job in the formatter.
The following illustration shows how the HP Color LaserJet 1600 printing-system software works.
Figure 4-1 HP Color LaserJet 1600 host-based driver overview
As a host-based printing system, the HP Color LaserJet 1600 print driver uses Microsoft Windows to
convert the graphics device interface (GDI) or device driver interface (DDI) calls from software programs
into JBIG (standard-compression) compressed pages. These pages are sent in “chunks” through the
driver to the printer formatter.
The HP Color LaserJet 1600 print driver also receives status messages from the formatter firmware.
These messages are passed to the Status Application, which then displays them.
The HP Color LaserJet 1600 printer formatter has 2 MB of read-only memory (ROM) and 16 MB of
double data rate random access memory (DDR RAM). Both the firmware and the compressed page
must fit into the 16 MB of DDR RAM. If the compressed page is too large for the available memory,
which is extremely rare, the All Pages Print mode is automatically invoked. The All Pages Print mode
reduces the resolution and attempts to create a balance between text and graphics print quality.
54 Chapter 4 Host-based driver features for Microsoft Windows ENWW
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