The Sharp X68000 remains remarkably capable hardware, but its original cooling arrangement was designed for a different age. Many surviving machines have fans…
Stories
Building A Quiet, Safe Fan Controller For The X68000
Restoring the X68000 Expansion Card Slot Gold Fingers
The Sharp X68000 relies on edge connectors for several important expansion paths, including memory boards, accelerator hardware, MIDI interfaces, SCSI…
Repairing a dead X68000 by checking the CPU clock signal
A Sharp X68000 that appears completely dead can be difficult to diagnose because several independent faults produce the same symptoms. A blank screen, no…
Recalibrating Analog Joystick Potentiometers on the X68000
The Sharp X68000 is remembered for fast arcade conversions, ambitious music software, and unusually capable peripherals. Its analog joystick systems are…
Understanding Floppy Disk Controller Commands on the X68000
The Sharp X68000 relies on a floppy disk controller that follows the command model established by the NEC uPD765 family. That design also appears in many…
A Practical SCSI Terminator for the X68000
The Sharp X68000’s internal SCSI interface is remarkably useful for connecting period hard disks, magneto-optical drives, removable media units, and modern…
Repairing the X68000 Power Supply Standby Circuit
The Sharp X68000 is old enough that power-supply faults are now a routine part of ownership. A machine may appear completely dead, refuse to respond to the…
Using The X68000 MIDI Out To Control A DAW
The Sharp X68000 occupies an unusual place in computer history. It was designed as a powerful Japanese home computer, yet its graphics, sound hardware,…
Making X68000 expansion access safer and easier
The Sharp X68000 remains an unusually rewarding computer to maintain because its hardware invites inspection, repair, and expansion. It also reflects the…
Replacing the Real-Time Clock Battery in an X68000
The Sharp X68000 remains remarkably serviceable for a computer designed in the late 1980s, but its real-time clock battery is one component that should not be…
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.