OpenAmiga500FastRamExpansion is an Open Hardware 4/8 MB Fast RAM Expansion for the Commodore Amiga 500 Computer.

Most low-end Amiga models only came with Chip RAM. "Big Box" models allowed for a different type of memory to be installed, known as Fast RAM, where fast means that it's dedicated to the main processor, so that it doesn't have to compete with the other chips in order to gain access to it (as is the case with Chip RAM). While both Chip and Fast RAM are limited in size, you can have at least a few MB of the latter on all Amigas (usually up to 8), while the former can never exceed 2 MB.

OpenAmiga500FastRamExpansion will allow you to add 4 or 8 MB of Fast RAM to your Amiga 500. This way you will be able to run more applications at once and more quickly. If you combine it with a chip RAM expansion, you will also be able to run almost all games supported by WHDLoad, pushing your Amiga to its limits. The Fast RAM will be mapped to $200000-$9fffff ($200000-$5fffff for the 4 MB version).

For more information, please visit github.com/SukkoPera/OpenAmiga500FastRamExpansion.