FujiNet for Intellivision FAQ - FujiNetWIFI/fujinet-firmware GitHub Wiki

General

Q: Can you attach a network adapter to an Intellivision? A: Yes, FujiNet is available for the Intellivision.

Q: What features does FujiNet provide for the Intellivision? A: It allows you to load software from the local or Internet network, or from an SD card. It also allows you to connect to network endpoints via its network adapter to both use modern internet services as well as play games with other systems.

Q: Can I build my own FujiNet? A: Yes. This Wiki page contains all the information needed to construct your own: DIY FujiNet for the Intellivision

Hardware & Protocol

Q: How does FujiNet communicate with the Intellivision? A: The FujiNet cart maps addresses $9C00 to $9F3F as 8-bit RAM to provide a mailbox for sending and receiving FujiNet commands and data. It's described here: FujiNet Intellivision Mailbox Protocol

Q: What microcontroller does the Intellivision FujiNet use? A: Two actually, an RP2040 or RP2354 to communicate with the bus and simulate ROM and RAM, and an ESP32S3 connected over USB to provide the network and storage. You can read more on the hardware here: FujiCard Hardware Notes

Q: Does the FujiNet Intellivision use the Minty firmware? A: Yes. The RP2xxx side of the device uses the Minty firmware to implement the bus, ROM, and RAM components.

Compatibility

Q: Does the FujiNet support ROMs that use JLP? A: Yes. The mailbox address range was specifically chosen so that the two could co-exist.

Q: Does the FujiNet support the Intellivoice? A: It does not conflict with it, so it can be used in tandem.

Q: Does the FujiNet support the ECS? A: It does not conflict with it, so it can be used in tandem.

Programming

Q: Can you use the FujiNet in ECS BASIC? A: Yes. You can PEEK and POKE to the FujiNet mailbox addresses to send/receive FujiNet network commands and data.

Q: Can you use the FujiNet in IntyBASIC? A: Yes. There's a comprehensive programming manual available both in PDF form and in Wiki form.

Networking & Protocols

Q: What protocols does the network adapter support? A: Currently: CLIPBOARD, CPM, FS, FTP, GDRIVE, GMAIL, HTTP, IMAPS, NFS, ONEDRIVE, S3, SD, SFTP, SMB, SSH, TCP, TNFS, TELNET, UDP, and WebSockets.

Q: SSH is mentioned above, does this mean I can SSH into my Linux box? A: Yes, currently using the netcat demo program on apps.irata.online.

Q: Does FujiNet support HTTPS, TLS, SSH, and other encrypted protocols? A: Yes. FujiNet provides a complete mbedTLS implementation that allows for secure protocols to be used.

Network Play

Q: Can you play unpatched Intellivision games over the network with other INTV FujiNet users? A: No. But you can play patched ones.

Q: Can you play patched Intellivision games over the network with other INTV FujiNet users? A: Yes. As of 2026-08-27, roughly 12 Intellivision games have been patched for network play: Armor Battle, Auto Racing, Baseball, Basketball, Bowling, Boxing, Football, Golf, Sea Battle, Shark Shark!, Snafu, and Utopia.

Q: Can other games be patched? A: Yes, everything has been documented as to the process in GitHub, e.g. see: fujinet-intv-baseball

Q: How do I access the game lobby? A: By pressing 0 when you see the HOST SLOTS screen. The lobby will boot automatically.

Q: Can I play lobby games against other FujiNet users? A: Yes, even those on different platforms, such as Atari, Adam, Apple II, CoCo, MS-DOS, MSX, and many others.

Host Slots & File Browsing

Q: What are host slots? A: Host slots are a directory of hosts that you can connect to, to load software. You can edit them to point to any server you wish, even your own.

Q: Can I use my SMB, FTP, GDRIVE, or NFS server in a host slot? A: Yes, prefix each host with SMB://, FTP://, GDRIVE://, or NFS:// as appropriate.

Q: Why is there an SD slot? A: This gives access to the SD card slot on the cartridge for local storage.

Q: How do I filter filenames in the current directory? A: After pressing 4 to filter, you can type in a wildcard, e.g. Space* to match all games beginning with Space.

Q: How do I recursively search for filenames starting at the current directory? A: After pressing 4 to filter, use ! as the first character, e.g. type !frog to search for anything containing Frog, e.g. Frog Bog or Frogger. The search is case-insensitive.

Support & Resources

Q: How can I get support for FujiNet? A: The FujiNet team provides a Discord server: Join here

Q: How can I get my own copy of the TNFS server? A: You can grab it here: tnfsd releases

Q: Can I see the firmware source code? A: Yes, it's in fujinet-firmware