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The Hyper Expander can either be built with a 16kB EPROM and up to 37kB of RAM, or can be assembled with up to 2 x 27C512 EEPROMS and 3kB or RAM. To build the PCB you will need to source your own parts and solder them in.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.