Panasonic FS-A1WX & FS-A1WSX Joystick Problem

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Van Meits

Scribe (6446)

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09-03-2021, 13:29

You've set your video to private, that means only you may watch it. If you do not want too many people to see it, try set it to unlisted, then people with the link can see it, but it won't show up in youtube searches.

Can you mail me the used rom?
my address is my nickname @ this domain

Van Nas_Sutromi

Rookie (29)

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09-03-2021, 15:48

Hello! I have already made it unlisted and tested the link, working OK.

The rom works on all my other MSX pretty good no problems, even the Carnivore 2 menu fails to support the joystick on the Panasonic while ok on the others, I have also made this test by pressing A at start and skipping the Carnivore 2 Menu but problem is the same.

Can't it be something wrong on the Carnivore 2 firmware? I can test on the Philips 8020, but on Philips 8235 + Sony F900 + Sony HB-F1XD there is no problem, so I gues the Philips 8020 will be ok.

Van Meits

Scribe (6446)

afbeelding van Meits

09-03-2021, 16:10

Still I would try your exact same rom. I do have a Zemina crack, but you can never be sure it's the same. Please e-mail it to me. If I can replicate the bug, the guys behind Carnivore 2 or Sofarun might find a clue.

Van Nas_Sutromi

Rookie (29)

afbeelding van Nas_Sutromi

10-03-2021, 17:34

Sent you the email, did you got it? It's the on on Better MSX 2.

Van Meits

Scribe (6446)

afbeelding van Meits

10-03-2021, 22:20

I received the file. It's the MSX2 version of the game. Earlier I tested the MSX1 version, so there's our difference. Now I tested your rom file and a dump of the same game with a different hash to find out if it was just a bad dump or not.
I tested it on a few methods:

  • Panasonic FS-A1WX+Carnivore 2+Sofarun 8+default settings: Bug
  • Panasonic FS-A1WX+Megaflashrom SCC+ SD+opfxsd+no turbo: Bug

(Since both devices show the same bug I decided to use the Megaflashrom for the next tests for convenience)

  • Panasonic FS-A1FX+Megaflashrom SCC+ SD+opfxsd+no turbo: Bug
  • Panasonic FS-A1WSX+Megaflashrom SCC+ SD+opfxsd+no turbo: No bug
  • Philips VG8235+Carnivore+Sofarun 8+default settings: No bug
  • Sony HB-F1XDJ+Megaflashrom SCC+ SD+opfxsd: No bug
  • Sony HB-F1XV+Megaflashrom SCC+ SD+opfxsd: No bug
  • Panasonic FS-A1ST+Megaflashrom SCC+opfxsd: No bug
  • OneChipMSX MSX2+ +Sofarun 5.1+default settings: No bug

Edit:
My Panasonic WSX does not seem to suffer this issue while yours does. This seems to point in the direction of the MSX-Engine used in the MSX2+ models by Panasonic. The FX and WX came with the T9769A or T9769B while the WSX came with the T9769B or T9769C. As it works on my ST which has a T9769C, my guess is that my WSX has that engine as well while yours might have the T9769B.
To be certain we should have to check our mainboards and read the chip's print.

Van Manuel

Ascended (18131)

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10-03-2021, 22:33

Does it happen with the original cartridge? Would be great to test that.

EDIT: if it's indeed in the T9769 revision, I'd really appreciate if someone writes some test software to find out how the PSG in these revisions responds for the joystick routines in Carnivore 2 and 1942. Is it too fast access, for instance? When it's clear, this could then be emulated in openMSX, I think Smile

Van Manuel

Ascended (18131)

afbeelding van Manuel

22-03-2021, 21:07

Meits checked his WSX and it has the T9769C, just like the turboR (ST) he has. So, looks like it works on the C, and may not work on the A, B or blank versions. Can someone help to find out what is special about these joystick routines?

Van Nas_Sutromi

Rookie (29)

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07-05-2021, 10:24

Hello MSX Fans (including me)!

I'm back with a belly of MSX, and have made a lot more test with the new toys I bought giving more and better insigt on the subject, you ready for this!!!

Van Nas_Sutromi

Rookie (29)

afbeelding van Nas_Sutromi

07-05-2021, 10:37

1942 [Zemina] on Carnivore2
JoyMega

  • Panasonic A1WX - stuck to the left like I'm always pressing left, up, down and fire work.
  • Panasonic A1WSX - only up, down and fire works but fire is A insted of B second fire (loop) does not work.

Bought two more MSX in January that I received this week and the results are:

  • Panasonic A1ST Turbo R - works 100%.
  • Panasonic A1WSX - works 100%.

So I'm guessing I hit the jack with the correct Panasonic A1WSX revision that supports the JoyMega this Is really Great.

Van Nas_Sutromi

Rookie (29)

afbeelding van Nas_Sutromi

07-05-2021, 10:46

Since I had a bit of distrust on the JoyMega I went I bought another adaptor from a Spanish Store, Retro Cables sell a cable to convert Mega Drive controllers to MSX: http://retrocables.es/tienda/index.php?id_product=318&controller=product&id_lang=4

And with this cable I have very diferent results:

1942 [Zemina] on Carnivore2
Mega Drive to MSX from Retrocables

  • Panasonic A1WX - does not work for right other wise all keys work good.
  • Panasonic A1WSX - works 100%.

My two new MSX that I received this week:

  • Panasonic A1ST Turbo R - works 100%.
  • Panasonic A1WSX - works 100%.

With this testing I confirm that the JoyMega is not the best adaptor for using on the MSX.

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