Editing Expanded memory (section)

==={{anchor|RAMpage|Quadems+}}Expansion boards===
[[Image:EmulexPersyst 4M ISA.jpeg|thumb|Emulex Persyst 4&nbsp;MiB ISA memory board]]
This insertion of a memory window into the peripheral address space could originally be accomplished only through specific expansion boards, plugged into the [[Industry Standard Architecture|ISA]] expansion bus of the computer. Famous 1980s expanded memory boards were [[AST Research|AST]] RAMpage, IBM PS/2 80286 Memory Expansion Option, [[AT&T Corporation|AT&T]] Expanded Memory Adapter and the [[Intel]] [[Above Board]]. Given the price of RAM during the period, up to several hundred dollars per MiB, and the quality and reputation of the above brand names, an expanded memory board was very expensive.