Search found 932 matches

by zeroone
Fri Feb 15, 2019 9:45 am
Forum: NESemdev
Topic: Vs. DualSystem
Replies: 72
Views: 50546

Re: Vs. DualSystem

Regarding the VS. System schematic , I see that the battery in the upper-left is in parallel with power. And the battery and power are protected with diodes. I assume this means that when the cabinet is powered by the mains, the battery is idle and its not losing energy. However, to the very right o...
by zeroone
Fri Feb 08, 2019 11:27 am
Forum: NESemdev
Topic: Vs. DualSystem
Replies: 72
Views: 50546

Re: Vs. DualSystem

Here are the results (from most interesting to worst): VS. Wrecking Crew -- High score table is saved VS. Balloon Fight / VS. Ice Climber (Dual) -- Coin slot distribution saved | High score table is not saved VS. Baseball / VS. Tennis -- Provides battery tester | Saves nothing (doesn't even provide...
by zeroone
Thu Feb 07, 2019 8:16 am
Forum: NESemdev
Topic: Most emulators i've tested don't do dual emphasis bits right
Replies: 21
Views: 16645

Re: Most emulators i've tested don't do dual emphasis bits r

The time flies ... Perhaps I was acting like a moron though. :beer: I remember that thread. For Nintaco, I borrowed the emphasis logic from Blargg's NTSC filter. With some adjustments, I got it to work for PAL as well. Until Firebrand repeats his tests on the full 512 palette, Blargg's math is the ...
by zeroone
Tue Feb 05, 2019 9:02 am
Forum: NESemdev
Topic: Most emulators i've tested don't do dual emphasis bits right
Replies: 21
Views: 16645

Re: Most emulators i've tested don't do dual emphasis bits r

Thanks for running that test.

It's very difficult to compare it against your photo of a monitor though. None of the emulators look like that photo.

For a valid comparison, we need a capture card image and one of those palette matrices test ROMs.
by zeroone
Mon Feb 04, 2019 9:10 am
Forum: NESemdev
Topic: NOAC handheld ROMs
Replies: 1
Views: 4207

NOAC handheld ROMs

Regarding the Atari Flashback, the Intellivision x-in-1, and others that use a NOAC to reduce manufacturing cost, have the Atari 2600 and Intellivision game remakes ROMs been dumped? And if those ROMs were available, is that something that could be easily emulated (perhaps with a new mapper) or are ...
by zeroone
Mon Feb 04, 2019 8:35 am
Forum: NESemdev
Topic: Vs. DualSystem
Replies: 72
Views: 50546

Re: Vs. DualSystem

You should give the option to convert from one ROM set to another. I'm considering adding that feature. However, unlike NewRisingSun's script, the aforementioned MAME parent-child archive file mechanism would prevent conversion of the variants. NewRisingSun's script works because it acts on the ful...
by zeroone
Sun Feb 03, 2019 11:46 am
Forum: NESemdev
Topic: Vs. DualSystem
Replies: 72
Views: 50546

Re: Vs. DualSystem

I implemented the GoodNES trick discussed above and it works fine. Aside from Raid on Bungeling Bay, the VS. DualSystem games can be loaded from the GoodNES set.

This means that there is 3 valid sources of VS. DualSystem ROMs: NES 2.0 files, MAME files and GoodNES files.
by zeroone
Sat Feb 02, 2019 1:09 pm
Forum: NESemdev
Topic: Vs. DualSystem
Replies: 72
Views: 50546

Re: Vs. DualSystem

I compared a few GoodNES sets and they all had these files: Balloon Fight.7z <Balloon Fight (VS) (Player 2 Mode) [b1].nes> Balloon Fight.7z <Balloon Fight (VS) [!].nes> Baseball.7z <Baseball (VS) (Player 1 Mode) [b1].nes> Baseball.7z <Baseball (VS) (Player 1 Mode) [b2].nes> Baseball.7z <Baseball (VS...
by zeroone
Fri Feb 01, 2019 5:24 pm
Forum: NESemdev
Topic: Vs. DualSystem
Replies: 72
Views: 50546

Re: Vs. DualSystem

You could direct people to my little batch file that converts MAME sets to canonical NES 2.0 files (well, except now for the battery bit), or include them with your emulator. With that batch file as a template and the set of hdr files, I was able to get my emulator to load MAME archives. That is, i...
by zeroone
Thu Jan 31, 2019 4:49 pm
Forum: NESemdev
Topic: Vs. DualSystem
Replies: 72
Views: 50546

Re: Vs. DualSystem

On a slightly different topic, other than frequenters of this forum, no one is going to have the ROMs to play the VS. DualSystem. But someone mentioned that the ROMs actually exists in the GoodNES set, but they are split across multiple files. Is it plausible to construct a table in which an emulato...
by zeroone
Thu Jan 31, 2019 4:02 pm
Forum: NESemdev
Topic: Vs. DualSystem
Replies: 72
Views: 50546

Re: Vs. DualSystem

So far it sounds like VS Wrecking Crew the only game that uses the battery for something interesting (not coin counting alone). Here are the results (from most interesting to worst): VS. Wrecking Crew -- High score table is saved VS. Balloon Fight / VS. Ice Climber (Dual) -- Coin slot distribution ...
by zeroone
Thu Jan 31, 2019 2:01 pm
Forum: NESemdev
Topic: Vs. DualSystem
Replies: 72
Views: 50546

Re: Vs. DualSystem

I told you I did, and nothing happens, because the game always clears that RAM. Yep. I just wanted to see for myself. I actually played until I legitimately got my name on the high score table. Then I was saddened when it disappeared after a bounce. Apparently, as mentioned several times already in...
by zeroone
Thu Jan 31, 2019 1:38 pm
Forum: NESemdev
Topic: Vs. DualSystem
Replies: 72
Views: 50546

Re: Vs. DualSystem

NewRisingSun wrote:And neither Vs. Tetris and Vs. Super Mario Bros. keep the SRAM content upon startup. Boo.
I can see the VS. Super Mario Bros. high score table in the SRAM region in a hex editor. I'll run a test in my emulator to see what happens if that region is persisted.