PCMCIA card manager reports a problem with high memory

[nac@eichler.unibas.ch (Norbert A'Campo)]

Hello all!

I've just upgraded my Linux Debian 2.0 box to kernel 2.0.35 and PCMCIA-cs 
3.0.5. And now I have the following message at boot time:
  Sep 23 22:20:58 klep kernel: cs: IO port probe 0x0100-0x03ff: excluding 0x220-0x22f 0x260-0x267 0x300-0x307 0x378-0x37f 0x388-0x38f 0x398-0x39f
  Sep 23 22:20:58 klep kernel: cs: IO port probe 0x0a00-0x0aff: clean.
  Sep 23 22:20:58 klep kernel: cs: warning: no high memory space available!
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  Sep 23 22:20:58 klep kernel: cs: memory probe 0x0d0000-0x0dffff: clean.

Once I even got this:
  Sep 23 21:57:15 klep kernel: Uhhuh. NMI received. Dazed and confused, but trying to continue
  Sep 23 21:57:15 klep kernel: You probably have a hardware problem with your RAM chips or a
  Sep 23 21:57:15 klep kernel: power saving mode enabled.

I have Pentium MMX 266 with 128 RAM (with append="mem=128m" in lilo.conf) and 
everything used to work fine with kernel 2.0.34 and pcmcia-cs 3.0.0. The 
messages were the same, but there was no warning message. Is it a known 
problem? What is NMI, after all?

Thanks a lot in advance for any help! I'm sorry if this is a FAQ.

  Norbert A'Campo