I tested with redump disc image MegaCD's "Shin Megami Tensei (Japan)".
Title is OK, but start and after a while, it freezed at the timing of the name input opened.
Hardware is Mega Sg.
version:4.7 NOV 5 2019
My megadrive was broken and could not be tested.
Mega SD setting is
version:01.03 R07
Emulate seek time: tested with checked and unchecked patterns.
JP CD BIOS:
Mega-CD 2 (JP) v2.00C
Graphics scaler speed up : checked NG, unchecked NG
Mega-CD (JP) v1.00S
Graphics scaler speed up : checked NG, unchecked NG