: I can't find any mentioned limitiations to the 64Mb problem.
>From bootparam(8):
`mem=...'
The BIOS call defined in the PC specification that returns
the amount of installed memory was only designed to be
able to report up to 64MB. Linux uses this BIOS call at
boot to determine how much memory is installed. If you
have more than 64MB of RAM installed, you can use this
boot arg to tell Linux how much memory you have.