Voltage fluctuations in a Sharp X68000 can produce symptoms that look like software faults, failing memory, or damaged expansion hardware. Random resets,…
Stories
Repairing Unstable X68000 Power Supply Voltages
Building a reliable joystick adapter for the X68000
The Sharp X68000 uses familiar-looking 9-pin D-sub connectors for its joystick ports, which makes controller projects appear deceptively simple. A few wires, a…
Installing a Gotek Floppy Emulator in the X68000
A Gotek floppy emulator is one of the most practical upgrades for an X68000. It replaces a mechanical 5.25-inch floppy drive with a small solid-state device…
Restoring an X68000 Floppy Drive Belt and Lubrication
The Sharp X68000 remains one of the most distinctive Japanese home computers of its generation, but its mechanical storage hardware is now several decades old.…
Understanding the X68000 Graphics Command List for Efficient Drawing
The Sharp X68000 is often described through its games, music, and distinctive tower-shaped cases, yet its graphics hardware rewards a much more deliberate kind…
Building a Hard Disk Activity LED Indicator for the X68000
The Sharp X68000 remains unusually approachable for hardware experimentation. Its expansion architecture, accessible internal wiring, and large community…
Repairing Crackling Audio on the Sharp X68000
Crackling audio is a common and irritating fault on aging Sharp X68000 computers. Music may sound clear for a few seconds before breaking into static, voices…
Adding Battery-Backed SRAM to the X68000 Expansion Bus
The Sharp X68000 is an unusually rewarding platform for hardware expansion because its architecture remains accessible at the signal level. A carefully…
Timing the X68000 for responsive game code
The Sharp X68000 gives game developers unusually direct access to the machine’s video, sound, and peripheral hardware. That freedom is a major reason the…
Restoring Contrast And Brightness Controls On The X68000 Monitor
A well-preserved Sharp X68000 deserves a display that looks as good as the computer itself. When the picture appears washed out, excessively dark, or difficult…
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.