Skip to content

Getting Started: Commodore 64

FujiNet for Commodore machines connects via the IEC serial bus — the same bus used by the 1541, 1571, and 1581 disk drives.

Compatible computers

Computer Notes
Commodore 64 IEC port on rear
Commodore 128 IEC port on rear
Commodore VIC-20 IEC port on rear

What you need

  • [x] FujiNet for Commodore (IEC variant)
  • [x] IEC cable (usually included)
  • [x] Your Commodore computer
  • [x] Wi-Fi password for your 2.4 GHz network
  • [x] microSD card (FAT32, optional)

Connection diagram

flowchart LR
    C64[Commodore 64/128\nIEC Port] -->|IEC Serial Cable| FN[FujiNet\nDevice]
    FN -->|Wi-Fi| NET[Internet / TNFS\nServers]
    FN -.->|SD Card| SD[(Local Images)]

IEC device addresses

The IEC bus supports multiple devices with addresses 8–15. FujiNet defaults to device 8 (the primary drive address). If you have a real 1541 on device 8, configure FujiNet to use a different address via CONFIG.

Step 1: Connect the hardware

  1. Power off your Commodore.
  2. Plug the IEC cable into the IEC port on the rear of the C64.
  3. Plug the other end into FujiNet's IEC port.
  4. Chain additional IEC devices (real drives, printers) from FujiNet's second IEC port if needed.
  5. Insert a microSD card if you have one.

Power off before connecting

Always power off before connecting or disconnecting IEC devices.

Step 2: Wi-Fi setup

  1. Power on your Commodore — FujiNet also powers on.
  2. If this is first-time setup, FujiNet broadcasts FujiNet-XXXXXX.
  3. Connect a phone or laptop to FujiNet-XXXXXX and open http://192.168.4.1.
  4. Enter your Wi-Fi credentials and click Save.
  5. FujiNet reboots and connects to your home network.

Step 3: Load CONFIG

On Commodore, CONFIG is loaded as a program from the emulated drive:

LOAD"CONFIG",8,1
RUN

Or if your keyboard is set up with the FujiNet auto-boot disk:

  1. Turn on your C64 — FujiNet presents the CONFIG disk automatically.
  2. The CONFIG program loads and displays the main menu.

Full CONFIG guide

See Using CONFIG — Commodore 64 for a complete walkthrough.

Step 4: Mount a disk image

  1. In CONFIG, go to Hosts & Devices.
  2. Browse an online TNFS server or your SD card.
  3. Select a .D64, .D71, or .D81 image.
  4. Mount it to device 8 (or another device number).
  5. Exit CONFIG.
LOAD"*",8,1
RUN

Troubleshooting

Symptom Likely cause Fix
?DEVICE NOT PRESENT ERROR FujiNet not on device 8 Check device address in CONFIG
Long load times Normal IEC speed FujiNet supports standard IEC speed; consider JiffyDOS
Can't see TNFS servers Wi-Fi not configured Reconfigure via FujiNet-XXXXXX hotspot

Next steps