AnotherMaker | Building a better Atari 400 and Atari 800 diagnostic cartridge @AnotherMaker | Uploaded August 2023 | Updated October 2024, 8 hours ago.
Thanks to PCBWay.com for sponsoring this video. You can find this project at pcbway.com/project/shareproject/ATARI_MULTI_GAME_CARTRIDGE_4_x_16KB_FOR_ATARI_8_BIT_FAMILY_SHORT_VERSION_053e8dbd.html

Stuff I used
EPROM Programmers
XGecu T56 EPROM Programmer (Fancy Model, the other 2 may be a better choice)
US and World - amzn.to/3C7ZCJw

XGecu T48 EPROM Programmer (New Budget Model)
US and World - amzn.to/3bTviaV

Hakko FX888d Soldering Station
US and World - amzn.to/3xVBMib
Canada - amzn.to/3vIy7Bv

Silicone Soldering Mat
US and World - amzn.to/3G4OqgT
Canada - amzn.to/3wumujg

Super Salt Diagnostic ROM files can be found here...
pcbway.com/project/shareproject/_DIY__SUPER_SALT_DIAGNOSTIC_CARTRIDGE_PCB_FOR_ATARI_8_BIT_FAMILY.html

This timestamped link will show you the EEPROM burning procedure.
youtu.be/teFFeE-XFoA?feature=shared&t=393

I use this for combining Bin files to load multiple cartridges on one rom. github.com/r1me/BINWizard