Xerox Phaser 3435 Service Manual page 219

Firmware Side is made up of
1. Network Interface Card is that relay the communication between Host and kernel using vari-
ous network protocol,
2. Kernel is that manages the flow control of emulation procedure, receiving data from Host or
Network card and printing with engine & rendering job,
3. Emulation is that interprets the various output data from selected emulation,
4. Engine is that prints rendered bit-map data to paper with required size and type by Kernel.
And then, for Job Spooling function for Multi-User, Multi-Printing that is occurred in Network print-
ing and various additional printing functions, this Kernel use max. 10 Queuing systems in a mem-
ory.
In Printing, the two procedures are
1. Case of using USB Port
• After user start to print the wanted document to PCL string or compressed GDI bit-map
data, Driver translate the all graphic data of it and send data to host spooler. And then the
spooler sends the data stream to the printer via USB port.
• Kernel receives this data from Host, and then select emulation fit to data and start
selected one. After emulation job end, Kernel sends the output bit-map data to Engine
using Printer Video Controller (by clock type for LSU).
• Engine print the received data to required paper with the sequential developing process.
2. Case of using Network Interface Card
• After user start to print the wanted document to PCL string or compressed GDI bit-map
data, Driver translate the all graphic data of it and send data to host spooler.
• If so, Port monitor managing network port receives data from spooler and sends a data
stream to the Network Interface Card.
• Network interface card receives it and send to Kernel part,
• Kernel receives this data from Host, and then select emulation fit to data and start
selected one. After emulation job end, Kernel sends the output bit-map data to Engine
using Printer Video Controller (by clock type for LSU).
• Engine print the received data to required paper with the sequential developing process.
The additional printing function are realized in
(1) Web environment
(2) Window environment.
On addition, Kernel informs a status of printing status and printer status to user made printing job
with the Status Monitor.
Phaser 3435
General Procedures and Information
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