N64 Cartridge Save Type Detection Test ROM

This is a simple test ROM for Nintendo 64 that can detect all known (and a few theoretical) cartridge-based save capabilities.

Supported save types

• EEPROM 4Kbit (512 bytes)
• EEPROM 16Kbit (2048 bytes)
• FlashRAM 1Mbit (128 KiB)
• SRAM 256Kbit (32 KiB)
• SRAM 768Kbit Banked (96 KiB)
  • Only used by one officially-licensed cartridge: Dezaemon 3D
  • Supported on EverDrive64 using SRAM 768K/SRAM 96K save type
• SRAM 1Mbit Banked (128 KiB)
  • Not used by any officially-licensed cartridge
  • Theoretically-possible: no known emulator/flashcart implementation exists
• SRAM 768Kbit Contiguous (96 KiB)
  • Not used by any officially-licensed cartridge
  • Only supported on EverDrive64 V3/X5/X7 using SRAM 1M/SRAM 128K save type
• SRAM 1Mbit Contiguous (128 KiB)
  • Not used by any officially-licensed cartridge
  • Only supported on EverDrive64 V3/X5/X7 using SRAM 1M/SRAM 128K save type

Multiple save types

• If a larger capacity is supported, any compatible smaller capacities will also be detected:
  • EEPROM 16Kbit implies that EEPROM 4Kbit is also supported.
  • SRAM 1Mbit Banked implies that both SRAM 768Kbit Banked and SRAM 256Kbit are supported.
  • SRAM 1Mbit Contiguous implies that both SRAM 768Kbit Contiguous and SRAM 256Kbit are supported.
• It is technically possible for a cartridge to contain EEPROM alongside SRAM or FlashRAM. No emulators or flash carts currently support this configuration.
• It is not possible for SRAM to co-exist with FlashRAM. This is because both SRAM and FlashRAM are accessed through Cartridge Domain 2 Address 2 memory space.

Run the test ROM

Download or compile the ROM file and load it as you would any other N64 ROM.

This ROM file has been tested to work on real Nintendo 64 hardware using the EverDrive-64 by krikzz and 64drive by retroactive.

This ROM file should also be compatible with low-level, accuracy-focused Nintendo 64 emulators such as Ares, CEN64 and MAME.

Build the ROM

1. Install LibDragon and make sure you export N64_INST as the path to your N64 compiler toolchain.
2. Run make to produce savetest.z64

License

This project is Unlicensed public domain software written by Christopher Bonhage.

LibDragon is Unlicensed public domain software.

“Nintendo 64” is a registered trademark of Nintendo used for informational purposes without permission.