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MultiModemZPX User Guide
Appendix E - Installing Under Linux
Introduction
This appendix explains how to install a modem on a computer operating under the
Red Hat Linux 6.2 operating system. Other versions of Red Hat and other Linux op-
erating systems should be similar. Briefly, in Linux, you do not need drivers for most
modems. Programs in Linux commonly call upon the port, rather than the modem.
Standard Linux Serial Port Definitions
PC port
Com1
Com2
Com3
Com4
Installation
Install the MultiModemZPX in the computer as described in Chapter 2.
Setup
1. Turn on the computer and allow the computer to boot to the command prompt.
2. Log on as root.
3. Determine the resources the modem is using by typing the command cat /proc/pci
4. Using the IRQ and first I/O address from the output obtained in step 3, type the
Linux port
ttyS0
ttyS1
ttyS2
ttyS3
or the command less /proc/pci. Look for the entry listing vendor id=11c1 and
device id=480. Note the IRQ the device uses as well as the first I/O address listed.
Output example:
Non-prefetchable 32 bit memory at 0x00000000
Bus 0, device 17, function 0:
Communication controller:Unknown vendor Unknown device (rev 0)
Vendor id=11c1
Device id=480
Medium devsel. Fast back-to-back capable.
Capable. No bursts.
Min GNT=252. Max lat=14
Non-prefetchable 32 bit memory at 0xe4000000
I/O at 0x6400
I/O at 0x6800
I/O at 0x6c00
command setserial /dev/ttySx uart 16550A port y irq z, where x is the serial de-
vice you want to use, y is the I/O address, and z is the IRQ. Example: setserial /
dev/ttyS2 uart 16550A port 0x6400 irq 11.
E Installing Under Linux
IRQ 11. Master
36
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