Memory mismatch

Hello list, I (thought) my system had 128 megs, from 2 64MB EDO DIMMS (on a Pentium Pro 200). The bios reports 128 megs, and the diagnostics in the bios pass the 128 megs okay. However, running "free" at the command line returns 64 MB total memory. total used free shared buffers cached Mem: 66144 42772 23372 0 5964 16472 -/+ buffers/cache: 20336 45808 Swap: 136512 0 136512 Are there any other tests I can run to find out what the problem is? Peter