Hidden MSX hardware

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By Piter Punk

Master (220)

Piter Punk's picture

08-03-2020, 02:51

Ok, besides the "Presenter" in the name of Taito's machine, it seems to not present anything.

By the Japanese video of it working and the unit examination, it's principal use is as some kind of lottery appliance. You can have it at your shop or party room and select customers to play and win some prizes.

The unit have another mode, called "Karaoke Linked", and... I don't know what it does. There are jacks labeled as "Karaoke Sound Input", but that's all.

I have another appliance that had some images "dancing" at the input sound rhythm. Maybe the Taito Presenter 2000 does the same, dunno.

By Piter Punk

Master (220)

Piter Punk's picture

17-03-2020, 21:59

Finally got the Panasonic VW-KT300 Video Titler software running on OpenMSX!

It still isn't 100% complete, since I don't know yet how is the inner works of this appliance. The empty squares should have characters inside when working OK.

By now, I mapped the SYSTEM0 ROM segment to slot 0 address 0x0000 and the FS-VA1 full ROM (including SYSTEM0 segment) to the slot 3.3, using the Panasonic Mapper.

Also included the A1FX Kanji font and... that's all. The appliance itself have more Kanji ROMs ICs, 32KB SRAM and an Jisho ROM, I am accepting sugestions about how to map them.

By mtn

Champion (261)

mtn's picture

19-03-2020, 16:09

Its nice to see my favourite blog updated once again! Cheers Piter Punk

By Piter Punk

Master (220)

Piter Punk's picture

20-03-2020, 00:30

mtn wrote:

Its nice to see my favourite blog updated once again! Cheers Piter Punk

Thanks! With the current health crisis, I won the time traveling to work back to me. These additional personal hours are helping to update the blog! We need to take the best of every situation.

And I just did a new post. It gives more information about the VW-KT300 emulation and the process to get it working.

By barbeque

Supporter (8)

barbeque's picture

16-07-2020, 06:04

I picked up an especially cheap XV-T33F from the auctions that had a socketed UV EPROM for a BIOS (label says "XV-T33; u2.0.3".) No second ROM is populated on my board; I assume the other one is for kanji or something for the Japanese market.

After spending a little more money on eBay, I located a copy of the UK service manual for the machine, which has many pages of pull-out schematics (missing from the PDF uploaded to archive.org, probably because they are extremely difficult to scan.)

I thought the large Sony gate array chip (MB620468) might contain MSX-Engine or at least i8255 PPI functionality, so I decided to transcribe the pin labels to a KiCad part to make it easier to check the pin names. Apologies in advance for the very tall image.

I'm not very familiar with the MSX architecture yet, but this chip looks pretty specialized to the application. The chip doesn't seem to line up with the pins described on an i8255 datasheet that I found. I'd be interested in hearing anything else that Piter Punk has found out about the titler!

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