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>13.7. Card Readers for SD/MMC/Memory Stick</H1
><DIV
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><A
NAME="AEN3645"
></A
>13.7.1. External Readers</H2
><P
>&#13; All external SD/MMC/CF-Card/Memory Stick readers are USB devices
and work fine with the <B
CLASS="command"
>usb-storage</B
> module.
The only caveat which might occur is that you may have difficulties
to determine the device assignment. Just use <B
CLASS="command"
>dmesg</B
>
after you have connected the reader. The command should show
a SCSI device like <TT
CLASS="filename"
>/dev/sda1</TT
> assigned to
the USB drive.
</P
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>13.7.2. Internal Readers</H2
><P
>&#13; Currently there are three kinds of devices available: USB, PCMCIA and
PCI devices.
</P
><P
>&#13; USB devices are seldom, but usually work out of the box. They behave
like the external readers mentioned above.
</P
><P
>&#13; Some readers are PCMCIA/CardBus devices. Often such a reader is located
near the CardBus slot. The command <B
CLASS="command"
>cardctl ident</B
>
will reveal these cards.
</P
><P
>&#13; For some laptops and notebooks a
<A
HREF="http://projects.drzeus.cx/wbsd"
TARGET="_top"
>driver for the Winbond's W83L518D and W83L519D SD/MMC card reader</A
>
is available.
</P
><P
>&#13; Some proprietary devices are not yet known to work with Linux. Except the
readers built into the SHARP Linux PDAs, but the driver is closed
source and available as a binary only for the ARM CPU.
</P
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