Mapper 011 repro board not working with some games

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mightydidz
Posts: 99
Joined: Wed Jan 24, 2018 12:04 pm

Mapper 011 repro board not working with some games

Post by mightydidz »

Hi,
I built myself a test cart with sockets for mapper 011.
It uses a HC377 to select the current PRG (32KB) and CHR (8KB) banks at ($8000-$FFFF)
I'm not using bit 2 & 3 since I'm using Attiny13A for lockout defeat.

It works fine with some games (ex: Spiritual Warfare, Metal Fighter, etc.)
But I only have black or pink screen with some other game (Sunday Funday: The Ride)

Any idea what may cause Sunday Funday not to work?
mightydidz
Posts: 99
Joined: Wed Jan 24, 2018 12:04 pm

Re: Mapper 011 repro board not working with some games

Post by mightydidz »

Could it be related to being a multicart?

I'm not using the charge pump circuitry since I'm using a attiny13a. Could it be related?

Should I add delay to any signal?
lidnariq
Posts: 11432
Joined: Sun Apr 13, 2008 11:12 am

Re: Mapper 011 repro board not working with some games

Post by lidnariq »

If the game by itself works fine in accurate emulators, I see no reason that the missing charge pump could be related.
mightydidz
Posts: 99
Joined: Wed Jan 24, 2018 12:04 pm

Re: Mapper 011 repro board not working with some games

Post by mightydidz »

Hi,
Is mesen considered an accurate emulator?
The Rom works fine in it.
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Individualised
Posts: 310
Joined: Mon Sep 05, 2022 6:46 am

Re: Mapper 011 repro board not working with some games

Post by Individualised »

Yes.
Zoldark
Posts: 72
Joined: Sat Oct 28, 2017 10:18 am
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Re: Mapper 011 repro board not working with some games

Post by Zoldark »

mightydidz wrote: Wed Apr 12, 2023 5:33 am Hi,
Is mesen considered an accurate emulator?
The Rom works fine in it.
Yes, and no depends on how you use it. That is Messen by default uses a Game Database to load most known games on their intended Hardware. There is a setting in Preferences under Advance that has a check box that say's Disable Built in Database (Not Recommended). I would try that and then see if the Rom still works. Don't forget to switch it back before running your other games with Messen.
Don't buy FamicomNes games WillyNilly Check the Mapper first
https://www.nesdev.org/wiki/Mapper
https://nescartdb.com/
I feel like I said something wrong even if I didn't I don't know for sure and I always feel bad about it.
Fiskbit
Posts: 891
Joined: Sat Nov 18, 2017 9:15 pm

Re: Mapper 011 repro board not working with some games

Post by Fiskbit »

The header, though, is not directly relevant for an actual physical cartridge. If ROM works with the database, then the ROM data is good, while its header may not be. Unless you're relying on the header data in the ROM file for making the repro, it won't matter if it's bad.

When you load the ROM in Mesen, if you go to Tools -> Log Windows, that will show you the header information and, if the ROM is in the database, the database information it's using to run the ROM. You can make sure that the hardware you're building matches the database information, assuming there is any.
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