Not heard of this emulator before but it supports a lot of systems, heres the release news:
vdmgr v0.1.8 is released. vdmgr is a multi-system emulator that emulates the NES, NeoGeo Pocket, Sega SG-1000 / Mark III, MCS BASIC-52, TD 4, GMC-4, Z80 computers and MSX.
vdmgr v0.1.8 changelog:
Fixed that bank of ROM was initialized when RAM / ROM of SGM was switched.
Fixed that SGM extended RAM was not initialized.
– Changing to select the device when reading the ROM image in which the expansion connector device exists in the database