It is an interrupt probe issue 

Forum: PCMCIA on Toshiba laptops
Re: Tecra 8100 issues (uses ToPic100)
Re: Congratulations on picking the hardware combo from hell (David Hinds)
Re: Loss of console/keyboard
Date: 2000, Apr 04
From: David Hinds <dhinds@pcmcia.sourceforge.org>

See the HOWTO section on interrupt probe failures and try the suggested fixes. -- Dave

to: "It is an interrupt probe issue"