AVGCART - THE average SD multicart for 8bit Atari
FPGA based multicart for 8bit Atari computers, extensible with SIO and/or ECI/PBI cables
supports CAR (cartridge dump) files up to 1MB and most bankswitching types
supports XEX (executable) files
supports ATR (floppy image) files (read/write) - support is limited without an optional SIO or ECI/PBI cable due to Atari cartridge port constraints (e.g. SW that uses RAM under OS does not work)
I'm using 1/8th inch (3mm) braid, it's tight, the 25cm cable needs 30cm of braid and you will need to put a gentle twist in the wires before you thread them or it goes really stiff.