Ricoh SAVIN A741 - Manual (Page 21)

Print Server Manual 13 A741
3 Functional block diagram of A741 Repro System
Explanation of various signals
A. Communication between rfxServer, Littlebear.sys driver and Littlebear card.
Due to the nature of the Windows NT system it is not allowed that programs communicate
directly with hardware. Normally this communication is done via a driver. The rfxServer
program can now communicate in a hardware independent way. To control a different printer
only the card and driver software need to be replaced.
B. Communication between driver and card.
C. Network communication
The Server and Client programs exchange (status)information via 'named pipes' through the
network. If a Client detects that rfxServer is present on the same system, it will be given the
status of 'Local Client', if the server is not present or not started, the Client will assume the
role of 'remote client'. This is the main reason why there must be an active network, even on
a stand-alone system.
Littlebear card
Littlebear.sys driver
rfxServer
Local Client Remote Client(s)
Local
Spool
Remote
Spool
C
E
A
D
B
Print Server PC