Author Topic: 300-in-1 SY-889 Handheld Dump (VTxx)  (Read 8436 times)

davidstech

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300-in-1 SY-889 Handheld Dump (VTxx)
« Reply #15 on: January 14, 2018, 01:29:11 PM »
Just a head's up that I'm working on adding this system to MAME

https://github.com/mamedev/mame/pull/3069

At the moment I've sorted out palette and memory issues, but there are graphical glitches I think due to the scanline IRQ issues that NewRisingSun2 discovered.

Y2K05

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« Reply #16 on: January 14, 2018, 03:09:56 PM »
Nice :D I wonder if this means further VT03 and VT09 compatibility will be added to MAME as well.

davidstech

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« Reply #17 on: January 14, 2018, 03:24:47 PM »
Hopefully, a few people have developed a good base now, I might look at improving VTxx support in MAME (and possibly integrate my VT168 stuff too) if I'm able to find the time.

NewRisingSun

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« Reply #18 on: January 14, 2018, 03:43:53 PM »
"Y2K05"
 
I wonder if this means further VT03 and VT09 compatibility will be added to MAME as well.[/quote]I sure hope not, but I fear it's unavoidable.

Y2K05

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« Reply #19 on: January 14, 2018, 03:45:41 PM »
You hope not?

NewRisingSun

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« Reply #20 on: January 14, 2018, 03:55:42 PM »
davistech
 
there are graphical glitches I think due to the scanline IRQ issues that NewRisingSun2 discovered[/quote]Try modifying the MMC3 scanline counter emulation to skip one scanline per frame, and then trigger the IRQ 32 PPU cycles/pixels later than when it would normally be triggered. That's what made it look clean in my emulation. I also return to normal IRQ behavior once the 4bpp mode is turned off, to make the original Mapper 4 games on that multicart look right, though I don't know whether that is what the actual hardware of that handheld does.
« Last Edit: January 14, 2018, 04:05:41 PM by NewRisingSun2 »

casperdj777

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« Reply #21 on: January 15, 2018, 09:58:43 AM »
which emulators run this? cant getting it working -thanks

davidstech

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300-in-1 SY-889 Handheld Dump (VTxx)
« Reply #22 on: January 15, 2018, 11:35:55 AM »
It runs in EmuVT under the VT09 settings with some issues, otherwise you will need to build MAME from source, or wait for MAME 0.194 or NewRisingSun2's latest build of Nintendulator to be released.

casperdj777

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« Reply #23 on: January 15, 2018, 12:59:57 PM »
can someone record a short clip of just the dancing fox into on this or will the record not work with this one?

NewRisingSun

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« Reply #24 on: January 15, 2018, 01:19:50 PM »
I am uploading a video right now.
There you go.
« Last Edit: January 15, 2018, 01:27:42 PM by NewRisingSun2 »

Y2K05

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« Reply #25 on: January 15, 2018, 01:31:53 PM »
It says www.touchgameplayer.com on the copyright screen for Contra? Did they add that in?

davidstech

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« Reply #26 on: January 15, 2018, 07:30:01 PM »
Yes, they have included their website into a number of games in many recent Famiclones, although their exact relationship to this product isn't known. I suspect they developed the software at least though.

davidstech

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« Reply #27 on: January 20, 2018, 12:22:06 PM »
It seems VRT must have fixed their sound hardware recently - I decapped the glob top inside and took a macro photo of the die, and it is indeed marked VRT. Still not sure what the part is, maybe a new part they haven't got on their website.