Mapping unknown

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alex18sak
Posts: 1
Joined: Fri Nov 11, 2022 3:06 pm

Mapping unknown

Post by alex18sak »

Hi guys. I recently found a rom that had an unknown mapper and is not running anywhere. I know it's HiROM but I don't know how to deal with the basics of assembly. I would just like to set the correct address so that the rom has a mapper. This is any version of the Fievel game.

Sorry for my bad english...
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dougeff
Posts: 3079
Joined: Fri May 08, 2015 7:17 pm

Re: Mapping unknown

Post by dougeff »

There's nothing unusual about that game. HiROM 4 Mbit (512 kByte). No other chips. No SRAM.

There are 2 versions of the game.

An American Tail : Fievel Goes West [USA]

An American Tail : Fievel Goes West [Europe] PAL

perhaps the region is the problem? PAL vs NTSC
nesdoug.com -- blog/tutorial on programming for the NES
alex18sak
Posts: 1
Joined: Fri Nov 11, 2022 3:06 pm

Re: Mapping unknown

Post by alex18sak »

dougeff wrote: Fri Nov 11, 2022 4:23 pm There's nothing unusual about that game. HiROM 4 Mbit (512 kByte). No other chips. No SRAM.

There are 2 versions of the game.

An American Tail : Fievel Goes West [USA]

An American Tail : Fievel Goes West [Europe] PAL

perhaps the region is the problem? PAL vs NTSC
Yes, nothing unusual. When you use ROM Header it will return this in Header option.
Image
Last edited by alex18sak on Sat Nov 12, 2022 1:22 pm, edited 1 time in total.
Oziphantom
Posts: 1565
Joined: Tue Feb 07, 2017 2:03 am

Re: Mapping unknown

Post by Oziphantom »

that just must be a bad ROM, or it has a header that it is not detecting? What is the file size?

Using the GoodSNES versions I get

Code: Select all

File: American Tail, An - Fievel Goes West (E) [!].sfc
Game: Fievel Goes West  PAL
Game code: ����
Type: HiROM
Map Mode: $21
Rom Type: $00
File size: 1024 KB
ROM size: 1024 KB
-----------------------------
-----------------------------
File: American Tail, An - Fievel Goes West (U)_.sfc
Game: Fievel Goes West  USA
Game code: ����
Type: HiROM
Map Mode: $21
Rom Type: $00
File size: 1024 KB
ROM size: 1024 KB
-----------------------------
so just bog standard 1MB HiROM with 1K SRAM.
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