Coleco ADAM Quickstart Guide

Welcome to the FujiNet quickstart guide for the Coleco ADAM. This guide covers hardware setup, WiFi configuration, and getting started with disk images. For a broader overview of all supported platforms, see the Platform Overview.

Getting to Know Your FujiNet

The ADAM FujiNet connects to your Coleco ADAM via the ADAMNet bus using standard RJ12 cables.

Physical Layout

Location	Feature	Details
Left side	Power switch	Pull forward = On, push back = Off
Right side	Micro-SD card slot	Push/push socket for local storage
Top	3 status LEDs	WiFi, Bluetooth, and ADAMNet activity
Top	3 buttons	Left, Middle, and Right (see Buttons below)
Back	2 RJ12 jacks	ADAMNet IN and OUT (labeled on top)
Back	Micro USB port	Firmware updates and serial debug output

Micro-SD Card

The SD card must be formatted FAT32. The exFAT format is not supported.

LED Indicators

LED (left to right)	Color	Meaning
Left	White	WiFi connected
Middle	Blue	Bluetooth connected (currently inactive in firmware)
Right	Yellow	ADAMNet activity

Buttons

All three buttons support short press, long press, and double-tap. Current assignments:

Button	Action	Function
Right	Short press	FujiNet reset

Note: Additional button functions for Left and Middle buttons are still to be determined. Check the FujiNet Discord for the latest updates.

Available Hardware

Several ADAM FujiNet devices are available from community makers. Check the FujiNet Discord for the most current list of producers and availability.

Connecting Your FujiNet

FujiNet is powered directly from the ADAMNet bus – no external power is required.

flowchart LR
    ADAM[Coleco ADAM\nADAMNet port] -->|RJ12 crossover cable| IN[FujiNet\nIN port]
    OUT[FujiNet\nOUT port] -->|RJ12 cable\noptional| DEV[Other ADAMNet Device\ne.g., keyboard, disk drive]

Connection Steps

Connect an ADAMNet cable (RJ12 6P6C crossover) from the FujiNet IN port to an ADAMNet port on your Coleco ADAM.
Optionally connect another ADAMNet device (keyboard, disk drive, etc.) to the OUT port on FujiNet with another ADAMNet cable.
Turn on the FujiNet power switch (pull forward).

Power Options

Power Source	Behavior
ADAMNet bus (default)	FujiNet powers on/off with the ADAM; power switch controls state
External Micro USB	Power switch is bypassed; FujiNet stays powered as long as USB is connected

The Micro USB port also provides:

A connection for firmware updates
Serial debug output to a computer’s serial monitor

First Boot

When you turn on the ADAM with FujiNet connected, the system will first attempt to boot SmartWriter (or another disk/drive if available). This happens because FujiNet is not fast enough to be fully ready before the ADAM completes its initial boot sequence.

Workarounds for Boot Timing

Method	Steps
Hold reset	Hold the ADAM reset button for a few seconds while turning it on, giving FujiNet time to start up, then release reset
External USB power	Power FujiNet from the Micro USB port so it is already running when the ADAM powers on

WiFi Configuration

On first boot (or when the saved WiFi access point is unavailable), FujiNet will prompt you to set up a wireless connection:

The CONFIG program loads automatically from FujiNet.
Select your WiFi access point from the list.
Enter the access point passphrase.
FujiNet connects and presents the main CONFIG screen.

Important: FujiNet uses the Espressif ESP32 chipset, which operates on 2.4 GHz WiFi only. If you use a dual-band (2.4/5 GHz) router with a shared SSID, you may experience connectivity issues. Consider setting up a dedicated 2.4 GHz SSID if problems arise.

Navigating CONFIG

CONFIG is designed to be intuitive and reminiscent of ADAM programs like SmartWriter.

Main Screen Layout

The main screen displays:

Host slots (top) – sources for disk images
Disk slots (bottom) – virtual drives available to the ADAM

Press Tab to jump between host slots and disk slots.

Host Slots

Host slots define where your disk images are stored. Each slot can contain:

Entry	Description
Hostname or IP (e.g., `adam-apps.irata.online`)	TNFS server address
`SD`	The onboard Micro-SD card
(blank)	Empty slot

With a host slot selected:

Press Return to browse and select disk images from that host
Press V to edit the host slot entry

Mounting and Booting

Select a host slot and press Return to browse available disk images.
Choose a disk image and select which drive slot to mount it in.
Choose read-only or read/write access.
Return to the main CONFIG screen and reboot to use your mounted disks.

Web User Interface

FujiNet provides a built-in web-based configuration interface accessible from any browser on the same network.

Finding Your FujiNet’s IP Address

Method	How
CONFIG screen	Press IV (Show Config) from the main CONFIG screen
Router admin	Look for the hostname “FujiNet” in your router’s connected devices list
Default hostname	Navigate to http://fujinet.local

Once you have the IP address, visit http://<IP_ADDRESS>/ in your browser (for example, http://192.168.0.123/).

Updating Firmware

Download the FujiNet-Flasher application (available for Windows, macOS, and Linux) from fujinet.online/download.

Connect FujiNet to your computer via the Micro USB port on the back and follow the flasher’s instructions.

For more information, see the FujiNet-Flasher documentation.

FujiNet Documentation