I took a gamble and managed to bought some kind of vhd interface card for victor hc90/95, but i have not yet received it. This card is not same as shown in wiki page https://www.msx.org/wiki/Victor_IF-C9C . It has two dsub connectors. The vhd-named connector seems like same kind as for Sharp X1( there was auction for sharp X1 vhd card and that separate unit between card and vhd player, but price went over 2000€). From X1 auction pictures the card schematics could be drawn as those pics were quite good(card contains only simple logic ics). But is it usefull for msx side comparsion or not? I have X1 machine also and vhd software for X1( "rom" software?). And one game (thunder storm) with cassette, but now lacking msx side cassette for it.
Anyway hopefully there is rom chip alive, and hopefully with that vhd basic inside.