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e2c100ae7f
I made some minor changes to the README to try and address the most common read-the-manual moments seen in the N64Brew Discord. Specifically, I broke out the features listed in the README into sub-categories, with the non-developer features up at the top for non-technical people to read first. The categories are: - Hardware-Dependent Game Features - Game Saves - Menu - Game Development - Cartridge Production Co-authored-by: Mateusz Faderewski <sc@mateuszfaderewski.pl>
107 lines
6.1 KiB
Markdown
107 lines
6.1 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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- **ROM and Save Memory On-board**
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- 64 MiB SDRAM memory for game and save data (enough memory to support every retail game without compromise)
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- 16 MiB FLASH memory for bootloader and extended game data (with extended memory flashcart supports game ROMs up to 78 MiB)
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- **Game Saves**
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- EEPROM 4k/16k, SRAM and FlashRAM save types with an automatic writeback to the SD card (no reset button press required)
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- **Hardware-Dependent Game Features**
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- 64DD add-on emulation
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- Battery backed real time clock (RTC)
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- **Menu**
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- Dedicated open source menu written specifically for this flashcart - [N64FlashcartMenu](https://github.com/Polprzewodnikowy/N64FlashcartMenu)
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- **Game Development**
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- ~23.8 MiB/s peak transfer rate SD card interface
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- ~23.8 MiB/s peak transfer rate USB interface for data upload/download and debug functionality
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- PC app to access the flashcart features:
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- Game/save data upload/download
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- Feature enable control
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- Debug terminal
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- Access to the SD card
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- Firmware update
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- [UNFLoader](https://github.com/buu342/N64-UNFLoader) support
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- IS-Viewer 64 debug interface (fixed 64 kiB buffer with a movable base address)
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- 8 kiB on-chip buffer for general use
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- Status LED and button for general use
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- [UltraCIC_C](https://github.com/jago85/UltraCIC_C) emulation with automatic region switching and programmable seed/checksum values
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- N64 bootloader with support for IPL3 registers spoofing and loading menu from SD card
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- **Cartridge Production**
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- Initial programming via UART header or via dedicated JTAG/SWD interfaces
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- 3D printable 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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## 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/8VNMKhxqQn) 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 the sponsor links on the [official website](https://summercart64.dev).
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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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