Vhd interface for victor hc90/95

In HC-95 schematics (in msxpro web site) there is pinouts for 96-pin slot, but pinout numbers for all three lines (a,b,c) are in wrong order, shuold be other way around (from up to down: 32 ... 1). Also it seems MSX slot picture has pinout numbers mirrored (left <-> right).

But the real question is about JVCREQ signal. Because there is drawns JVCREQ signal as only pull up resistor to +5V, so constant high signal if the connected card in 96-pin slot does not alter it. So card will set it, and not HC-95 side? If that is right, then why this VHD card only reads this JVCREQ signal as input signal? It reads the signal in case there would be some other card that would set his JVCREQ as low, and then this VHD card needs whole address (0xFFBC- 0xFFBF) to access VHD ports . But when standalone (or other card do not set the JVCREQ to low), then this VHD card needs only I/O address (0xBC- 0xBF) to access VHD ports. So what is the point to have this differentiation?

now i updated the pcb with the missing reset line also to github: https://github.com/popolonx/MSX_STUFF/tree/main/vhd_c9d_card

VP commands seems to work in Victor HC-7 cartridge slot with IF-C9D connected via adapter.

Yes, i have Thunder storm cassette for MSX and X1. And VHD interpreter cassette for X1. But i do not have that X1 side interface(tried to bid to that same auction...), only Sharp VHD X10B player. Can you matten take photos inside that VO-20PC unit? As one dream is to also replicate that X1 side interfaces. And then upload the cassettes...

Now i also made initial cartridge version schematics and pcb based on C9D card:
https://github.com/popolonx/MSX_STUFF/tree/main/vdh_cartridg...