Two Sega Saturn optical drive emulators got firmware updates over the weekend: the Fenrir and the SAROO.

The Fenrir firmware, available on the official website, is specifically for the Lite model. It fixes bugs that prevented Fenrir Loader Kai, a version of PseudoSaturn Kai specific to the ODE, from loading games.
It also fixed a problem with the B button working in the file browser.
The Fenrir Lite debuted in August and last got a firmware update three months ago. But ever since then, some users in the device’s official Discord server reported being unable to load games from the SD card using Fenrir Loader Kai.
The Fenrir’s creator, Ced, posted an initial fix Friday evening in his Discord, then worked with Fenrir users to make tweaks until he was satisfied enough to make it a new stable release Sunday morning.
TPUnix releases SAROO new firmware update
Meanwhile, the SAROO got a firmware update Saturday morning from its creator, TPUnix.
Version 0.8 is available from TPUnix’s GitHub. Its patch notes are as follows, via DeepL machine translation from the original Chinese:
- Added support for playing CD+G format audio CDs.
Supports files in CUE/BIN/SUB or CUE/BIN/CDG formats.
.sub or .cdg files must share the same name as the .cue file. Example: foo.cue/foo.sub
Additionally, tools provide a CD+G repair utility. - Added support for 2P controllers.
You can now use the 2P controller to operate within the SAROO interface. - Various bug fixes and game fixes.
TPUnix’s frequent collaborator TZMWX announced version 0.8 on X. In that post, they warned that TPUnix’s firmware and the firmware that SAROO tester YZB put out in September and updated last week are different, and cross-using them may cause errors.
It’s unclear whether TPUnix used any of YZB’s input for the newly added CD+G support or if they created that separately.
This is TPUnix’s first firmware update since December last year when they added the ability to display game cover art, functionality for running burned physical discs, additional languages in the SAROO menu and other improvements.

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