Ultimate 1MB, Incognito and SIDE “Alt” Firmware Released

After a year of development and nine months of public beta testing, release versions of the “Alt” firmware (Main BIOS, PBI BIOS and XEX Loader) for U1MB and Incognito are finally available for download, along with an updated User Manual and newly written Technical Documentation. Also available is the new stand-alone XEX Loader for the SIDE/SIDE2 cartridge.


Ultimate 1MB Firmware Downloads

Incognito Firmware Downloads


As well as correcting any issues over the coming weeks, I will also be adding complete sample flash ROM images (including the WIP Graphical OS) and uploading a small library of plugins for the U1MB BIOS (including a plugin supporting the new Rapidus board).