Vhd interface for victor hc90/95 | MSX Resource Center (Page 15/20)

Champion (364)

19-03-2023, 09:57

The video issue is not related to VHD card but something with by Victor HC-7.
My VHD card for Victor HC-9x and VHD cartridge module (in Victor HC-7) seems to work with games that have game code on cassette.

We are only lacking full VHD implementation to play games that have game code on VHD disk itself. I have hunch that maybe IF-7900 shares same 8049 chips and roms as IF-C9C. So dumping of the ROM from IF-7900 card or from IF-C9C would help. That dumping shuold be easy task (and no harm is done to cartridge) to owners of that card. But somehow the owners are not interest to share that...

By Apolonius

Resident (49)

20-03-2023, 12:27

Well, the people that have thouse cartridges don't want to share because the want to do business with it, I don't have other explanation...

By popolon_

Champion (364)

28-03-2023, 13:31

IF-7900 manual arrived, and it contains all the VHD basic command descriptions. So very cheap 20 euro investment for this information.

By popolon_

Champion (364)

28-03-2023, 17:38

According to this manual, there is really only two basic extension commands for VHD cartridge: VP and VHD. But there are many subcommands under that VP command(A,B,C,D,E,G,H,I,J,L,M,P,S,T,U). I will try those commands and also write to wiki.

By mars2000you

Enlighted (6480)

28-03-2023, 17:45

popolon_ wrote:

According to this manual, there is really only two basic extension commands for VHD cartridge: VP and VHD. But there are many subcommands under that VP command(A,B,C,D,E,G,H,I,J,L,M,P,S,T,U). I will try those commands and also write to wiki.

A mystery resolved!

If you have the time and the opportunity, can you scan the manual, create a PDF file and upload it on archive.org and/or send it to file-hunter?

By popolon_

Champion (364)

28-03-2023, 18:28

I will scan it when i have time. By the way, this manual lists Victor HD 7800 player as vhdpc compatible, and that is not listed in our wiki pages.

By mars2000you

Enlighted (6480)

28-03-2023, 18:39

popolon_ wrote:

I will scan it when i have time. By the way, this manual lists Victor HD 7800 player as vhdpc compatible, and that is not listed in our wiki pages.

It seems to be a 'variant" of the HD-7900, they have the same remote control CT-V78: https://page.auctions.yahoo.co.jp/jp/auction/q1065582974

By popolon_

Champion (364)

31-03-2023, 23:17

I updated the wiki page for VP command. But the current format of that page may not look so good now.
I also updated IF 7900 page to correct the rom size, as that is 32K.
Not yet had time to test all these commands if those all will work with C9D based card.

By mars2000you

Enlighted (6480)

31-03-2023, 23:24

Thanks for all your work. I will improve later the way the infos are given, the most important is that all useful infos about this command are present on the page.

By mars2000you

Enlighted (6480)

01-04-2023, 02:17

Done!

I think almost all is easy to understand, the only exceptions are

* the L command
* the status N3+N4 in A command