UNOCART SD card Multi Rom Cartridge for ATARI 600XL, 800XL, 65XE, 800XE, 130XE
Compatible with ATARI 600XL, 800XL, 65XE, 800XE, 130XE, XEGS. It supports files up to 128k in size. If the board is uncased, check you’ve got it the right way round. Power on the Atari. The table below shows what types will be used.