The Sharp X68000 is remembered for sharp pixel graphics, fast arcade conversions, and a distinctive Japanese RGB display setup. Its original CRT monitors are…
Stories
Restoring the X68000 CRT monitor screen burn-in
Building a USB keyboard adapter for the X68000 with Arduino
The Sharp X68000 remains remarkably usable, but its original keyboard is becoming one of the harder parts of a complete system to replace. Keyboards are…
Using the X68000 expansion port with a logic analyzer
The X68000 expansion port provides an unusually useful view into the computer’s internal bus activity. With the right adapter, a logic analyzer can reveal…
Repairing the X68000 Floppy Drive Index Sensor
The floppy drive is one of the most failure-prone parts of an aging Sharp X68000. Belts harden, eject mechanisms lose tension, read/write heads become dirty,…
Installing a Supercharger IDE Adapter in the X68000
The Sharp X68000 remains remarkably serviceable for a computer designed in the late 1980s, but its original storage hardware is now one of the least reliable…
Creating a Bootable Diagnostic Disk for the X68000
A bootable diagnostic disk is one of the most useful tools to keep beside a Sharp X68000. It can help separate a software problem from a failing floppy drive,…
Repairing Missing Colors on an X68000 CRT Monitor
A missing color on an X68000 CRT monitor can look like a software fault, a damaged RGB cable, or a failing display tube. In most cases, the screen is still…
Replacing the X68000 VDG without losing the machine's history
The X68000’s video display generator is one of the least approachable components in the system. It is a custom Sharp LSI rather than a common, catalogued part,…
Building a Parallel Port Printer Interface for the X68000
The Sharp X68000 was designed to work with a wide range of peripherals, including Japanese dot-matrix printers, plotters, and other devices using a parallel…
Recapping the X68000 Motherboard Electrolytic Capacitors
The Sharp X68000 is old enough that its electrolytic capacitors deserve attention even when the computer still boots normally. These components gradually lose…
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.