SC64 - an open source Nintendo 64 flashcart

Features

• 64 MB SDRAM memory for game and save data
• 16 MB FLASH memory for bootloader and extended game data
• 8 kB on-chip buffer for general use
• 25 MB/s peak transfer rate USB interface for data upload/download and debug functionality
• 25 MB/s peak transfer rate SD card interface
• EEPROM, SRAM and FlashRAM save types with automatic writeback to SD card (not implemented yet)
• Battery backed real time clock (RTC)
• Status LED and button for general use
• 64DD add-on emulation
• IS-Viewer 64 debug interface
• Software and firmware update via USB interface
• N64 bootloader with support for IPL2 registers spoofing and loading menu from SD card
• Enhanced UltraCIC_C emulation with automatic region switching and programmable seed/checksum values
• PC app for communicating with flashcart (game/save data upload/download, feature enable control and debug console)
• UNFLoader support

High-level flashcart block diagram

Finished sample