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Idea Sounds like irq/configuration problem 

Forum: PCMCIA on Toshiba laptops
Re: Question PCMCIA Socket not recongized in a Tecra 700CT (Bernardo Gil)
Date: 2000, Mar 21
From: maxdude

I had the same problem with my 700CT, under both Mandrake 6.0 & Caldera OpenLinux 2.3.

What I found was that my PCMCIA configuration files needed some modifications to recognize both cards. Once I made the following changes, I was able to insert & remove PC-Cards with ease.

Try the following:

In the /etc/sysconfig/pcmcia file.

PCMCIA=yes

PCIC=i82365

PCIC_OPTS="cs_irq-9 irq_list=4,10,11

CORE_OPTS=

CARDMGR_OPTS="-f"

NOTE: The above file assumes you want your PCMCIA modem recognized as ttyS0. You must be sure that your BIOS is set to use the internal serial port as com2: (irq=3, port=2f8) Otherwise, remove "4" from the "irq_list=" entry.

Next, modify the /etc/pcmcia/config.opts file:

- Make sure that the following entries are present -

exclude irq 3

exclude irq 5

exclude irq 7

exclude irq 12

exclude irq 14

exclude irq 15

- Comment out the following entry -

# exclude irq 4

NOTE: The above entry again assumes that you want your PCMCIA modem recognized as ttyS0.

After these modifications, I was able to see PC-Cards as they were inserted into or removed from each slot.

I had to make one more file modification in order for the modem to automatically work with kPPP. Add the following line to the /etc/rc.d/rc.local file:

setserial /dev/modem auto_irq autoconfig

Hope this helps.

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