VTxx Dumping Thread

[Y2K05]

Thanks david! I'm excited  to check this out!

I feel like even though VT03/09 games are often nothing groundbreaking, the thought of being able to emulate them is exciting since they've only verry recently been emulatable outside of EmuVT.

[davidstech]

NewRisingSun2

Feb 4 2018, 04:11:40 PM

A few other comments regarding MAME:

• mc_dcat8a does not like more than 2 KiB of internal RAM. Mighty Bomb Jack will act strange with more.
  
• $4105 is not emulated yet as an exact mirror of $8000, causing Mighty Bomb Jack in mc_dcat8a and Violent to look garbled. Note that EmuVT makes the same mistake, while FCEUX does not.
  
• Consider using my attached VT03 palette generation algorithm, which I have matched to get as close as possible to EmuVT's hard-coded palette

[/quote]Thanks so much for your help! The palette code in particular will be a brilliant help, that was quite a struggle even to get remotely right so getting that near perfect will be nice.

[Y2K05]

Hmm, i thought the VT03 palette was already perfect in Nintendoulator-NRS?

https://vignette.wikia.nocookie.net/bootleggames/images/1/14/Shark.png/revision/20180120043046 - EmuVT screenshot from taizou
https://vignette.wikia.nocookie.net/bootleggames/images/1/14/Shark.png/revision/latest?cb=20180120043047 - My screencap retake in Nintendoulator-NRS.

[NewRisingSun]

I am switching back and forth between the hard-coded EmuVT and my own generated palette between builds. I think the current builds use the hard-coded palette. I'll post a few comparison screenshots later. I want to make it selectable using the palette dialog in the menu, but I hate programming user interface stuff, so I keep deferring it.

[Y2K05]

"There was a problem parsing the package." - my Android device says this when I attmept to install the nesvt-compiled MAME build.
And yes, i allow apk from untrusted sources.

[davidstech]

Y2K05

Feb 4 2018, 04:38:22 PM

"There was a problem parsing the package." - my Android device says this when I attmept to install the nesvt-compiled MAME build.
And yes, i allow apk from untrusted sources.[/quote]Seems OK on my phone at least, I'm not an Android dev - this is my first time building an apk - so I can't really offer any advice other than trying the download again in case it got corrupted.

[NewRisingSun]

Here are a few comparisons between EmuVT's palette, which I include hard-coded in the current Nintendulator-NRS build, and my generated palette. Left: Hardcoded, right: generated.

First the good ones that are close enough as far as I am considerd:




And now the bad ones that I cannot get to look right (without making everything else look off):



Basically, cyans and pastel browns are slightly off.

[Y2K05]

davidstech, i wonder if it got corrupted when i downloaded it from your websites, which tends to be cumbersome. Is it ok if i tried like a Google Drive link or something?

[davidstech]

Y2K05

Feb 4 2018, 04:58:23 PM

davidstech, i wonder if it got corrupted when i downloaded it from your websites, which tends to be cumbersome. Is it ok if i tried like a Google Drive link or something?[/quote]Try this?
https://drive.google.com/file/d/1fjY_n0-tuyKb6iVJpDI2Hu1XAxNI7Dxl/view?usp=sharing

[Y2K05]

ok i'll try thataw, what a disappointment. it still doesn't parse. Was this compiled for high-power android devices such as your phone?Thank you for trying at least, davidstech. I'll still hold on to this apk

[davidstech]

This was compiled using SDK 21, NDK r14b which I think requires a minimum android version of 5.0 but I'm not entirely sure, as I said I have no experience in android dev. I may try tomorrow building MAME for Android as a retroarch core if I have time, that might be more successful and would also fix the input issues.

[Y2K05]

Yeah I don't think the GPD XD is optimized for Android 5 & onward. The LegacyROM firmware is supposed to spoof the Nexus 5 as well.

Anyway, it's cool how you're still looking into this--I thought it was nice enough that you even compiled an NES-VT MAME in the first place.

[davidstech]

Thanks for your help, NewRisingSun2, I've added the bank scrambling and new palette code to MAME. The Samurai 60 in 1 is working now, but the Z-Dog still isn't. It seems like it is jumping to locations in RAM that don't contain code, and crashing, possibly following RTI with a broken stack. Curious if you know any reasons for this off the top of your head?

[NewRisingSun]

After having had spent time getting Samuri to run, ZDog ran well all by itself, so no.

[davidstech]

An update on the android stuff. I was able to build MAME for RetroArch but unfortunately it was crashing (segmentation fault). This happens even with last weeks official build of MAME (0.194)'s nes_vt driver on Android, so clearly something is broken in the driver which needs to be fixed. I think once it's working it might be a reasonable route to cross platform VTxx support.