50 lines
2.3 KiB
HTML
50 lines
2.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML>
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<HEAD>
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<META NAME="GENERATOR" CONTENT="LinuxDoc-Tools 0.9.21">
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<TITLE> Serial HOWTO: Quick Help</TITLE>
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<LINK HREF="Serial-HOWTO-3.html" REL=next>
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<LINK HREF="Serial-HOWTO-1.html" REL=previous>
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<LINK HREF="Serial-HOWTO.html#toc2" REL=contents>
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</HEAD>
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<BODY>
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<A HREF="Serial-HOWTO-3.html">Next</A>
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<A HREF="Serial-HOWTO-1.html">Previous</A>
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<A HREF="Serial-HOWTO.html#toc2">Contents</A>
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<HR>
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<H2><A NAME="s2">2.</A> <A HREF="Serial-HOWTO.html#toc2">Quick Help</A></H2>
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<P>This repeats more detailed information found elsewhere. If your
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computer can't seem to find your serial port and you already know
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something about hardware resources (addresses like 3F8 and IRQs like
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5) then try this: First, get into the BIOS (often called "setup")
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when the computer is powered on by pressing certain keys. To find out
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what keys to press, watch the screen as your PC starts up. If
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the words that flash by on the screen too fast to read, freeze them
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by holding down the "pause" and "shift" keys at the same time. Then
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when read, hit any key to resume (cease pausing) and hold down the
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key(s) required to enter the BIOS setup. You may have to try this
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again since there may be more than one screen which you can freeze
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with the "pause" key. Also, look for messages about the serial ports
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on these frozen screens.</P>
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<P>Once in the BIOS menus, try to find menus dealing with the serial port.
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They could be shown in a menu dealing with Resources, Plug-and-Play,
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Peripherals, Ports, etc. Some old BIOSs setups (before 1995 ?) didn't
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deal with the serial ports. Make sure the ports you need are not
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disabled and note how they are configured (like 3F8 IRQ 4). You may
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need to change the configuration to prevent conflicts. There could be
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a shortage of IRQs if the BIOS has reserved some IRQs that it didn't
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need to reserve.</P>
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<P>For serial ports to be found, either the kernel must have been
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compiled with serial support, or serial support must be provided by a
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module. To check this look in the file /boot/config-2.6... and search
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for SERIAL. =m means it's a module and you may check to see the
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modules that are being used by typing: lsmod.</P>
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<HR>
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<A HREF="Serial-HOWTO-3.html">Next</A>
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<A HREF="Serial-HOWTO-1.html">Previous</A>
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<A HREF="Serial-HOWTO.html#toc2">Contents</A>
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</BODY>
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</HTML>
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