highmem kernel question

[Tyler Smith <tyler.smith@mail.mcgill.ca>]

Hi,

I've upgraded my RAM from 512M to 1.5G, (the original 512 plus a new
1GB chip). I've installed it correctly, as verified by the BIOS and
WinXP on the same machine. Debian testing only sees 906792kb vs
1563056kb in WinXP. Google tells me that I need a kernel with highmem
support. I can't sort out what I need to do though - is this
accomplished with a different linux-image from aptitude, and if so,
which one?

tyler@blackbart:~$ uname -a
Linux blackbart 2.6.18-3-486 #1 Mon Dec 4 15:59:52 UTC 2006 i686 GNU/Linux

Thinkpad R60, Intel Core Solo 1660 Mhz CPU

-- 
Regards,

Tyler Smit