A Special [[Cartridge]] with a socket that allows easy modification of the built in ROM software.
This can one seems to come from Spain. ==How To ?== This may be made by "cannibalizing" an existing Cartridge (Let's say... a GX4000 Burnin'Rubber Cartridge, as it is the most common one).
Remove the ROM properly (the biggest chip) but be careful not to harm anything else. Then file a hole in the Cartridge, add a ROM/EPROM socket...there you are.
[[Image:CPC GX4000-Multi EPROM Cartridge-2.jpg|thumb|300px|Fitted in a CPC Plus]]
[[Image:Multi eprom cartridge box.jpg|thumb|300px|Details of the plastic parts]]
==Links==
[http://cpcrulez.free.fr/hardware_montage_DIP32_GX4000.htm How to do it yourself at CPC Rulez]