IBM Notebook A21M 最高可以用幾多MB RAM&用邊種RAM?

Memory
100 MHz, Non-parity, 64-bit SDRAM SO DIMM memory. Expandable to a maximum of 512 MB with 64, 128, or 256 MB DIMMs. Two internal slots are available for one extra memory module for customers who require a memory upgrade. The 64 MB card can be replaced with a 256 MB card and another 256 MB card added to the extra slot.

very expensive.