linav and avos seem to have merged into ArchOpen. Check out their page for information on the AV3XX, AV4XX and the Gmini 400. This could probably serve as a hardware documentation, and programming source if you want Rockbox on any of these players. AV3XX?, AV4XX? and the Gmini 400. This could probably serve as a hardware documentation, and programming source if you want Rockbox on any of these players. ArchOpen.