AR-BD14 (serv.man5). ARBD14-Service Manual - Sharp Copying Equipment Service Manual (repair manual). Page 46

This manager controls I/O to connect with PC. It supports the auto-
matic port selection; when data are sent to a port, the manager
automatically selects the port and receives data from the port. 

There are two modes in the automatic port selection. 

In one mode, the automatic port selection is resumed after a certain
time from reception of data from a port. In the other mode, the auto-
matic port selection is performed every time when a print job is per-
formed. In the case of the AR-5132, there are two kinds of ports;
parallel ports (1284) and external I/O ports. 

This manager controls command communication with the print en-
gine. Print images supplied by the print queue manager are printed
on paper by the command communication with the print engine. 

The PJL module analyzes PJL (Printer Job Language). The PJL is a
command which specifies the various states of the printer job. For
example, the PJL specifies the emulation which analyzes print data. 

The AUTO switching module automatically judges that the print data
are PCL print data or PS print data when there is no emulation
specifying command. 

The print queue controls supply of necessary print images made by
each emulation and deletion of unnecessary print images depending
on the print engine. 

The front panel control module controls the key operations on the
operation panel and the display. 

The 1284 driver controls data communication at 1284 port. 

The Ext. I/O driver controls data communication at the external I/O
port. 

The Engine I/F driver controls data communication of engine I/F
which connects the print engine. 

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