Sufami Turbo

[Markfrizb]

I was recently asked about a little known Sufami Turbo game (Car Rangers) and I was intrigued on how this system worked. The Wiki on this system is here: https://en.wikipedia.org/wiki/Sufami_Turbo
So I acquired a base and a few sub cartridges to research. Although I have Zero interest in making a reproduction of this system, the schematic PDF is drawn in modern terms, thus, the IC designators don't necessarily match, many parts, like the CIC, ROMs, SRAM, are listed in modern parts (not the OEM ones) or different packages (like Tsop packages) but the connections are still the same. Included in the sch are several notes about the unknown parts listed in the NOCASH documents, cartridge connections, etc....

Thumbnail of how this thing works: The Sufami Turbo (ST) has a bios rom that you don't really see unless there is no cartridge present.... the BIOS runs in the background at power on and then loads the sub carts. It's very much like a 1A3B mapper where the games have a max size of 1mB and the helper sub carts are all 512k in size.

[Ice Man]

Making repros out of these carts is very easy. I did Car Ranger long ago.

Basically you put the BIOS at beginning of the file and merge it with the game data to be put at address x1000000 thus resulting in a 1.5MB file.
They should be all LoROM anyway.

I have attached the IPS patches to be used on the original Sufami Turbo ROMs to convert them to standard SNES format.

[bikerspade]

For reference, the following appear to be invalid Slot A + Slot B Sufami Turbo combinations for SD Gundam:

Axis Senki + Colony Kakutouki
Axis Senki + Zanscare Senki

Babylonia Kenkoku Senki + Colony Kakutouki
Babylonia Kenkoku Senki + Zanscare Senki

Gryps Senki + Axis Senki
Gryps Senki + Babylonia Kenkoku Senki
Gryps Senki + Colony Kakutouki
Gryps Senki + Zanscare Senki

Ichinen Sensouki + Axis Senki
Ichinen Sensouki + Babylonia Kenkoku Senki
Ichinen Sensouki + Colony Kakutouki
Ichinen Sensouki + Zanscare Senki

Using any of these particular combinations will result in Sufami Turbo error screens prompting the carts to be swapped between Slot A and Slot B.