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102 lines
6.2 KiB
Markdown
102 lines
6.2 KiB
Markdown
# SummerCart64 - a fully open source N64 flashcart
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[<img src="assets/sc64_logo.svg" />](assets/sc64_logo.svg)
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**For non-technical description of the SummerCart64, please head to the https://summercart64.dev website!**
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## Features
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- 64 MiB SDRAM memory for game and save data
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- 16 MiB FLASH memory for bootloader and extended game data
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- 8 kiB on-chip buffer for general use
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- ~23.8 MiB/s peak transfer rate USB interface for data upload/download and debug functionality
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- ~23.8 MiB/s peak transfer rate SD card interface
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- EEPROM, SRAM and FlashRAM save types with automatic writeback to SD card
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- Battery backed real time clock (RTC)
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- Status LED and button for general use
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- 64DD add-on emulation
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- IS-Viewer 64 debug interface
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- N64 bootloader with support for IPL3 registers spoofing and loading menu from SD card
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- Dedicated open source menu written specifically for this flashcart - [N64FlashcartMenu](https://github.com/Polprzewodnikowy/N64FlashcartMenu)
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- Enhanced [UltraCIC_C](https://github.com/jago85/UltraCIC_C) emulation with automatic region switching and programmable seed/checksum values
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- PC app for communicating with flashcart (game/save data upload/download, feature enable control and debug terminal)
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- [UNFLoader](https://github.com/buu342/N64-UNFLoader) support
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- Initial programming via UART header or dedicated JTAG/SWD interfaces
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- Software and firmware updatable via USB interface
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- 3D printable plastic shell
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---
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## Documentation
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- [Quick startup guide](./docs/00_quick_startup_guide.md)
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- [Memory map](./docs/01_memory_map.md)
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- [N64 commands](./docs/02_n64_commands.md)
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- [USB interface](./docs/03_usb_interface.md)
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- [Config options](./docs/04_config_options.md)
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- [FW and SW info](./docs/05_fw_and_sw_info.md)
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- [Build guide](./docs/06_build_guide.md)
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---
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## Help / Q&A
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For any questions related to this project, please use [*Discussions*](https://github.com/Polprzewodnikowy/SummerCart64/discussions) tab in GitHub repository.
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Using discussions tab is highly encouraged as it allows to have centralized knowledge database accessible for everyone interested in this project.
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I'm also active at [N64brew](https://discord.gg/WqFgNWf) Discord server as `korgeaux` but keep in mind that [*Discussions*](https://github.com/Polprzewodnikowy/SummerCart64/discussions) tab is a preferred option.
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Note that my time is limited so I can't answer all questions.
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---
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## How do I get one?
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Most up to date information about purchasing/manufacturing options is available on https://summercart64.dev website!
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If you want to order it yourself then I've prepared all necessary manufacturing files on the [PCBWay Shared Project](https://www.pcbway.com/project/member/shareproject/?bmbno=1046ED64-8AEE-44) site.
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**Be careful**: this is an advanced project and it is assumed that you have enough knowledge about electronics.
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Selecting wrong options or giving PCB manufacturer wrong information might result in an undesired time and/or money loss.
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Boards also come unprogrammed from the manufacturer - you need to do **initial programming step** yourself after receiving the board.
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**Price of the components is not included in the initial quote at the checkout** - manufacturer will contact you later with updated price.
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To avoid problems _**please**_ read **both** [build guide](./docs/06_build_guide.md) and description on the shared project page **in full**.
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If you have even slightest doubt about the ordering or programming process, it is better to leave it to someone experienced - ask in the [n64brew Discord server](https://discord.gg/WqFgNWf) if that's the case.
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**Full disclosure**: for every order made through [this link](https://www.pcbway.com/project/member/shareproject/?bmbno=1046ED64-8AEE-44) I will receive 10% of PCB manufacturing and PCB assembly service cost (price of the components is not included in the split). This is a great way of supporting further project development.
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If you don't need a physical product but still want to support me then check my [GitHub sponsors](https://github.com/sponsors/Polprzewodnikowy) page.
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---
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## High-level flashcart block diagram
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[<img src="assets/sc64_block_diagram.svg" alt="SC64 block diagram" width="800" />](assets/sc64_block_diagram.svg)
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---
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## Finished example
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[<img src="assets/sc64_finished_example.jpg" alt="SC64 finished example" width="800" />](assets/sc64_finished_example.jpg)
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[<img src="assets/sc64_pcb_front.jpg" alt="SC64 PCB front" width="800" />](assets/sc64_pcb_front.jpg)
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[<img src="assets/sc64_pcb_back.jpg" alt="SC64 PCB back" width="800" />](assets/sc64_pcb_back.jpg)
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---
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## Acknowledgement
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This project wouldn't be possible without these contributions:
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- [64drive](https://64drive.retroactive.be) ([archived](https://web.archive.org/web/20240406215731/https://64drive.retroactive.be/)) orders being on permanent hold long before creating this repository.
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- [EverDrive-64 X7](https://krikzz.com/our-products/cartridges/ed64x7.html) being disappointment for homebrew development (slow USB upload, unjustified price and overcomplicated SD card access).
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- Context: Both aforementioned products were priced at $199 in 2020. 64drive features made it a vastly more useful tool for homebrew development.
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Since then, 64drive had never been restocked and EverDrive-64 X7 price was lowered to $159 (as of May 2024).
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- [Jan Goldacker (@jago85)](https://github.com/jago85) and his projects:
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- [Brutzelkarte](https://github.com/jago85/Brutzelkarte_FPGA) providing solid base for starting this project and sparking hope for true open source N64 flashcarts.
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- [UltraCIC_C](https://github.com/jago85/UltraCIC_C) reimplementation for easy integration in modern microcontrollers. Thanks also goes to everyone involved in N64 CIC reverse engineering.
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- [N64brew](https://discord.gg/WqFgNWf) Discord server community being very helpful during flashcart development.
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- [FatFs](http://elm-chan.org/fsw/ff/00index_e.html) FAT32/exFAT library being easiest to integrate in embedded environment.
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- [Yakumono's (@LuigiBlood)](https://twitter.com/LuigiBlood) extensive [64DD documentation](https://github.com/LuigiBlood/64dd/wiki) and its implementation in various emulators.
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- [Libdragon](https://github.com/DragonMinded/libdragon) open source N64 SDK project and its developers.
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- [SERV](https://github.com/olofk/serv) bit-serial 32-bit RISC-V CPU soft core.
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