# Cemu detailed changelog for 1.21.0# Patreon release date: 2020-08-21# Public release date: 2020-08-28general: The title manager now has an option to export and compare file hashesThere is also an option to compare with an online database maintained by us and the community.This database is currently still empty, to contribute hashes for your games visit https://checksums.cemu.infogeneral: Graphic packs can now extend the amount of emulated RAM that is available for gamesThe maximum amount of RAM that can be added is limited to about 2GiB due to constraints given by the architectureFor demonstration purposes we created an example graphic pack for Breath of the WildAfter updating your graphic packs you can find it under BotW -> Mods -> Extended MemoryNote for gfx pack developers:Most games don't detect and utilize extra memory on their own and need additional code patches to adjust (often hardcoded) heap sizesGraphic pack version was also bumped to 6. This version remains fully backwards compatible and only adds the new RAM extension feature.CPU/JIT: Fixed a very rare bug where Cemu would apply an incorrect optimization to ADDIC+SUBFEThis fixes several issues in the SM64 portVulkan: Correctly emulate rasterizer disable flagFixes an issue in XCX where there would be a brightly colored pixel in the center of the screenOpenGL/Vulkan: Added support for negative viewport height