Some bugs found in current BlastEm core build, Retroarch, Sept 9th 2026

Hey, hi there Retroarch developers.

Some small bug reports that found around in quick tests.

1. This "garbage pixels" area or CRAM dots area was completely removed. I remember an older BlastEm core build in Retroarch that had it no problem, the same as Standalone. In picture can be seen. All borders cropping was set to 0, yet still cannot see the garbage pixels.

2. An user, close to developer named Sik, made an awesome NTSC - Rainbow banding feature for BlastEm standalone. I didnt see it available here, in case could please be added.

3. I do not know if BIOS message can be set up in current BlastEm build, just like in Genesis plus gx. It's an awesome feature as well.

4. In blastem options, it's set: MegaDrive model (default Gen/MD 1 VA3) then I switch to Gen/MD 2 VA1, then Manage Core options -> Save game options -> then close the core.

Re-open the core and nothing happens, just get back to menu, in case it was not reported.

Thank you once again for all the awesome work, both in RetroArch & BlastEm, for so many years.

The issue names the BlastEm core in RetroArch but does not identify files, tests, or entry points. Start by reproducing each of the four reports and compare the core with BlastEm standalone, especially garbage pixels, NTSC rainbow banding, BIOS messaging, and saved model options. Done is not defined because the report combines several behaviors without expected results or acceptance criteria.