The Sharp X68000 stores important system settings in battery-backed CMOS memory. The battery preserves items such as the real-time clock, boot preferences,…
Stories
Building a Replacement CMOS Backup Battery Holder for the X68000
Writing a Bootloader That Chainloads Human68k from SD Card
An SD card gives the Sharp X68000 a practical replacement for aging floppy disks, hard drives, and removable media. The storage is inexpensive, silent, and…
Using an FPGA to Emulate the X68000 Sound Board
The Sharp X68000 is remembered for its exceptional graphics, but its audio hardware is equally important to the character of the system. Arcade conversions,…
Creating a Color Calibration Chart for the X68000 Monitor
A color calibration chart is a simple but valuable tool for anyone maintaining an X68000 setup. It provides repeatable reference colors for checking a CRT…
Adding a hard disk activity indicator to the X68000
A hard disk activity light is a small modification, but it adds useful information to an X68000 that has been fitted with a SCSI hard disk, CompactFlash…
Understanding Shared Memory in the Sharp X68000
The Sharp X68000 is often described as a 68000-based computer with unusually capable graphics hardware. That description is accurate, but it can hide an…
Repairing a Faulty X68000 SCSI Terminator
A faulty SCSI terminator can make an otherwise healthy Sharp X68000 appear to have a dead hard disk, damaged interface, or unstable expansion board. The…
Designing a Backlit Logo for the X68000 Case
The Sharp X68000 has a distinctive industrial design: twin vertical towers, a compact central profile, and a front panel that looks purposeful even when the…
Building a quiet ATX power adapter for the X68000
Replacing a failing X68000 power supply with an ATX unit can extend the life of a valuable Japanese home computer, but a simple rewiring job is rarely enough.…
Restoring the X68000 keyboard membrane contacts
The keyboard is one of the most frequently used parts of an X68000, yet it often receives less attention than the computer’s power supply, floppy drives, or…
Nereid-X Expansion Board
A personally-produced LAN+USB+Memory expansion board for Sharp X68000 series computers. Multiple production runs were offered, including a final batch and a later revival reproduction run.
Power Supply Repair
X68 power supply repair and modification services were offered by the site owner, with documentation shared through diary entries spanning 2001–2006.
Server & Networking
Notes on FreeBSD administration, ISP changes, server migration, and networking topics. The site itself ran on FreeBSD with the hns diary system and Namazu search integration.
Get in touch
X68K.NET connects Sharp X68000 enthusiasts through community links and shared projects. Reach out with questions about the Nereid project or X68 resources.