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- Posted on
November 11, 2004, 8:49 am
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I got a NEC PCMCIA USB 4-port adapter. The card is unbranded but the
drivers shipped with it on the CD are written by some OrangeWare corp.
Under Linux, "lspci" shows:
NEC USB Controller Rev 43
The CD has the drivers under the folder, "uPD720100", so I am assuming
thats the chipset.
Here's the strange part. I tested the card with two laptops, Dell
Inspiron 3800 and Dell Latitude C600. The devices I tested were:
- BenQ 64MB drive - USB 1.1
- Adcom Ethernet to USB adapter - 2.0
- Sony 256MB Memory stick - 2.0
- Scientific Atlanta cable modem - 1.1
- D-Link 560M USB modem - 1.1
Only one device works - the Adcom Ethernet to USB adapter. I checked
all devices under three OSs - Linux (2.4.26 and 2.4.20), Windows XP Pro
SP2 (fully patched) and Windows 2000 Pro SP4 (fully patched).
If I do a tail of the log messages on Linux:
- the D-Link USB modem is improperly allocated resources and fails to
come up. - the cable modem is recognised but packets are only able to
leave the interface not come back. So TX works but no RX. Very weird.
- No *reaction* is evoked when I plugin the two mass storage devices.
The LED on the Sony lights up when plugged in but the LED on the BenQ
does not light up!!
All these devices work fine when I plug them into the in-built USB 1.1
port on both the laptops.
Am I looking at buggy drivers, buggy chip or a faulty chip?
Re: NEC PCMCIA USB adapter does not recognise all devices
Yes, the card does have a power-in connector. And someone else also
pointed out using the built-in USB port or the PS/2 port to power the
USB PCMCIA card. Apparently, the PCMCIA slots only have 3.3V power
whereas the USB devices require 5V.
I have the USB to power-in cable but thats kind of stupid to use
because I bought the USB PCMCIA card after the built-in port's plastic
thingy broke making it very fragile. I'll probably use PS/2 power cable
or an external power supply.