Technical information

Serial Solutions What To Do First
The presence of multiple cards using this Lynx card type
sharing mechanism, as used on the Quad RS232 and the Lynx 8
port RS232, as well as the more limited Digiboard cards, is
passed to Serial Solutions using the /L parameter on the
NEWCOM.SYS line in the CONFIG.SYS file.
The syntax is:-
/L s, i, r
where
s is the shared interrupt status register address,
i is the interrupt line shared by the ports
r may be a list of single ports or a range of ports
For example the following two lines are equivalent:-
/L 300,15,3,4,5,6,7,8,9,10
/L 300,15,3-10
is used to signify that the Lynx 8 port card has a sisr at
0300hex, using interrupt line 15, shared amongst Com ports
COM3, COM4, COM5, COM6, COM7, COM8, COM9, and
COM10.
For example:-
/L 3A0,11,5-12
is used to signify that the Lynx 8 port card has a sisr at
03A0hex, using interrupt line 11, shared amongst Com ports
COM5 through to COM12.
Handshake Selection.___________________
The handshake used by a port depends on what wires are
present in the cable used to interconnect the devices and which
pins the wires are joined to at each end of the cable. The cable
is often called a ’cross over’ cable. Both the PC and the external
device have to agree on which handshake method they are using
for communications to run smoothly. If the either side uses
different handshaking methods either no data will be sent or
incoming data will be lost.
In many ways handshaking is similar to the use of traffic
lights on a road, the red light stops the flow of traffic, the green
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