Computer Systems Corporation Laptop PC BIOS Guide

11
Serial Ports Submenu
The Serial Ports submenu allows you to select the port
addresses and interrupts for the COM and IR ports.
Figure 12. Serial Ports submenu
The Serial Ports submenu consists of two sections:
■
COM A I/O Settings
■
Infrared Port I/O Settings
The COM A I/O Settings section allows you to select
which port address and interrupt will be used for COM
port A. COM1,3F8,IRQ4 is the default setting. To
select a different address and interrupt, use the up and
down arrow to choose a different one.
The Infrared Port I/O Settings section allows you to
select which port address and interrupt will be used for
COM port B (infrared port). IR2,2200,IRQ3 is the
default setting. To select a different address and inter-
rupt, use the up and down arrow to choose a different
one.
LPT Port submenu
The LPT Port submenu allows you to select the port
addresses and interrupts for the internal printer port.
Figure 13. LPT Port submenu
The LPT Port submenu consists of three sections:
■
Port Address
■
Port Definition
■
DMA Settings For ECP Mode
The Port Address section allows you to select which port
address and interrupt will be used for the internal
parallel (LPT) port. This is also known as the parallel
port. LPT1,378,IRQ7 is the default setting. To select
a different address and interrupt, use the up and down
arrow to choose a different one.
The Port Definition section allows you to assign
advanced capabilities to an attached device that supports
the capabilities. Bidirectional (PS-2) is the
default setting. To select one of the other selections --
Standard AT (Centronics), Enhanced
Parallel (EPP), or Extended Capabilities
(ECP), use the up and down arrows to choose a
different one.
Note that Extended Capabilities (ECP)
must be selected in order to enable the DMA Setting For
ECP Mode section.
The DMA Setting For ECP Mode section allows you to
set the DMA channel for the parallel port if ECP Mode is
selected in the Port Definition section. DMA 0 is the
default setting.
OK
Ca
n
cel
Serial Ports
Serial
Ports
(*) COM1, 3F8, IR
Q
4
(
)
Disable
d
( ) COM2, 2F*, IR
Q
3
( ) COM3, 3E8, IR
Q
4
( ) COM4, 2E8, IR
Q
3
Infrared Port I/O Settin
g
s
:
(
)
Disable
d
( ) IR1, 2100, IR
Q
4
(*) IR2, 2200, IR
Q
3
( ) IR3, 2300, IR
Q
4
( ) IR4, 2400, IR
Q
3
COM A I/O Settin
g
s
:
LPT Port
LPT Port
(*) LPT1, 378, IR
Q
7
(
)
Non
e
( ) LPT2, 278, IR
Q
5
( ) LPT3, 3BC, IR
Q
7
P
o
r
t
A
dd
r
ess
(
)
Standard AT
(
Centronics
)
(*) Bidirectional (PS
/
2
)
(
)
Enhanced Parallel
(
EPP
)
(
)
Extended Ca
p
abilities
(
ECP
)
P
o
r
t
D
e
fini
t
i
on
DMA Setting For ECP Mode
(
*
)
DMA
0
(
)
DMA
1
(
)
DMA
2
OK
Ca
n
cel
Components Menu
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