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Introduction
How the ColorPASS operates
The ColorPASS enables the customer to use a copier as a printer and scanner. Users can
print to the ColorPASS from networked PCs running Microsoft Windows, from
networked Mac OS computers, and from networked UNIX workstations running
TCP/IP.
The custom-designed boards and system software of the ColorPASS are responsible for
efficient image processing and printing controls. The main functions of components and
software are described in the following paragraphs.
The ColorPASS uses specialized circuit boards, the motherboard, and the copier interface
board to process image data for printing and scanning images.
The motherboard includes a 2GHz CPU that controls the image data transfer to and
from the copier interface board and runs the interpreter. The interpreter rasterizes the
page description file and then compresses the image pattern into memory.
The interpreter sends compressed raster data through the image frame buffer memory to
the copier interface board. The copier interface board decompresses the image data and
sends it to the copier through the copier interface cable. The raster data supplied to the
laser in the copier charges the drum and renders the final image on paper at full copier
speed.
High-speed DIMMs (dual in-line memory modules) on the motherboard hold the image
data during printing. The ColorPASS is configured with two 256MB DIMMs for a total
of 512MB of memory.
When Fiery Scan uses the copier as a scanner, the ColorPASS acquires red, green, and
blue (RGB) image data from the copier, stores it in memory, and transmits it to the
computer that requested the scan.