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Author Topic: NWC 1990 reproduction cart. has the rom been dumped?  (Read 444 times)
marioxb
Guest
« on: September 01, 2007, 02:18:59 pm »
Has anyone dumped the version of the game sold on the cartridge here?:
http://www.retrousb.com/index.php?productID=146

I just purchased the cartridge and don't have a way to dump it. This version of the game has the official contest time of 6:21 and the rom will most likely work in all emulators. I can now play the game on my real NES without spending thousands, put I'd also like to play it on my Xbox. I have the rom of the original version, and played it on FCEU Xbox, but the timer is all wrong. I can barely ever even make it to Tetris. I'd love to have an emulated version with the correct time.
Disch
Guest
« Reply #1 on: September 01, 2007, 02:44:44 pm »
That link you posted is a rebuilt cartridge with the ROM put on it.  So yes, the ROM is dumped (otherwise they wouldn't have been able to make that cartridge)


Quote from: marioxb on September 01, 2007, 02:18:59 pm
I can barely ever even make it to Tetris. I'd love to have an emulated version with the correct time.

The time is configured by dipswitch settings (actual switches on the cartridge -- or at least on the original.  Nothing to do with the ROM).  The "official" setting is probably different from what FCEU is using as a default.

NEStopia, I believe, defaults to the "official" setting, and thus has the right time.
Kitsune Sniper
Guest
« Reply #2 on: September 01, 2007, 03:29:32 pm »
Um, the game on that cart has the dip settings harcoded so nobody can change them. I do recall that some emulators could change those values, but I forget which ones.

You can probably change the time settings on your emulated copy by using Game Genie codes.
Disch
Guest
« Reply #3 on: September 01, 2007, 04:10:30 pm »
The mapper has a 30-bit IRQ counter that increments each CPU cycle.  There were 4 dipswitches on the cartridge that controlled the "target value" that the IRQ counter had to reach before the IRQ occured (resulting in the TIME UP message in game).

Emus can change the desired time by changing the target value.  I know at least Nintendulator allows you to change the dipswitch settings -- NEStopia might as well.

You could not do anything with game genie or by hacking the ROM, since the time isn't a setting set by the game -- but is a fixed number set by the configuration of the hardware (via the dipswitches).

Further links of interest:
Kevtris' mapper page
My mapper docs (mapper 105)
KingMike
Guest
« Reply #4 on: September 01, 2007, 10:21:48 pm »
Nesten supports the dipswitch (it adds a special menu for certain mappers (I can only remember NWC and FDS).
marioxb
Guest
« Reply #5 on: September 02, 2007, 07:17:40 am »
But I want the version with the non-changeable timer. Is there someone that can dump the cartridge for me?
creaothceann
Guest
« Reply #6 on: September 02, 2007, 08:21:34 am »
Quote from: marioxb on September 02, 2007, 07:17:40 am
But I want the version with the non-changeable timer. Is there someone that can dump the cartridge for me?


Quote from: Disch on September 01, 2007, 02:44:44 pm
The time is configured by dipswitch settings (actual switches on the cartridge -- or at least on the original.  Nothing to do with the ROM).


Quote from: Disch on September 01, 2007, 04:10:30 pm
You could not do anything with game genie or by hacking the ROM, since the time isn't a setting set by the game -- but is a fixed number set by the configuration of the hardware (via the dipswitches).
Kitsune Sniper
Guest
« Reply #7 on: September 02, 2007, 10:44:28 am »
Er... so you couldn't block the bit of code that tells the game "Go to the next event" by using a game genie code? I don't mean change the timer, that much I understood. I mean not let the game take you to the next uh, game.
Disch
Guest
« Reply #8 on: September 02, 2007, 12:00:59 pm »
Quote from: marioxb on September 02, 2007, 07:17:40 am
But I want the version with the non-changeable timer. Is there someone that can dump the cartridge for me?

You misunderstand.  The dipswitch settings are physical switches you can manually flip with your finger that sit on the cartridge board.  These cannot be represented in the ROM, because the ROM is just a snapshot of the software... therefore the ROM you're asking for is the one you already have.  The reason it is emulated differently is because different emulators emulate the dipswitches differently.

see the image at the top of this page:

http://www.tripoint.org/kevtris/mappers/nes_custom/NES_EVENT.html

In the lower right corner -- those 4 little switches control the length of the timer.  There's nothing the ROM can do to change them.

Quote from: Kitsune Sniper on September 02, 2007, 10:44:28 am
Er... so you couldn't block the bit of code that tells the game "Go to the next event" by using a game genie code? I don't mean change the timer, that much I understood. I mean not let the game take you to the next uh, game.


Oh.  Yeah you could do that.  I thought you meant a GG code to make the timer longer.  My mistake  ^^
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