Interface Card Type 1MB RAM
MPN 1MB RAM
Brand Lo-Tech
Compatible Port/Slot ISA

Check the listing for details. Lo-tech 1MB Memory Board for 8-Bit XT PCs / Clones. Condition: New. Listed at 57.99 USD. The top 384k is typically reserved for BIOS, leaving the lower 640k available for applications. It is possible it may work in later systems to a degree, but it would cripple performance as the data bus is limited to 8 bits.

$29.00
$57.99