The Sharp X68000 was designed for a period when its power supply was new, its electrolytic capacitors had their original specifications, and replacement parts…
Stories
Adding a Hardware Power-On Delay to Protect the X68000 PSU
Restoring an X68000 floppy drive to reliable readability
The floppy drive is one of the most important parts of an original Sharp X68000. It loads operating systems, games, development tools, music software, and…
Building a Trackball Input Interface for the X68000
The Sharp X68000 is best known for its arcade-quality graphics and sound, but its input hardware also makes it an interesting platform for custom peripherals.…
Recapping the X68000 monitor synth module
The Sharp X68000 is remembered for its distinctive tower design, powerful graphics hardware, and unusually rich audio capabilities. Its monitor system is part…
Using an X68000 as a serial console for an embedded device
The Sharp X68000 is well suited to hands-on serial work. Its built-in RS-232C interface gives the machine a direct connection to development boards, routers,…
Understanding Interrupt Priorities on the Sharp X68000
The Sharp X68000 feels responsive because its Motorola 68000 processor can react to several kinds of hardware events while software is running. Timers, serial…
Installing a WiFi Classic Dongle with a Serial Bridge
The Sharp X68000 was designed for a world of local disks, cartridge-like expansion hardware, and dial-up communication. Connecting one to a modern network…
Repairing Composite Video on the Sharp X68000
The Sharp X68000 was designed around a high-quality RGB display connection, so composite video is not equally standard across every model and revision. A…
Building a Light Pen Interface for the X68000
A light pen is a deceptively simple retrocomputing accessory. A sensor at the tip detects the bright spot produced when a CRT electron beam passes beneath it,…
X68000 graphics modes: choosing 512x512 or 256x256
The Sharp X68000 is remembered for sharp arcade conversions, colorful computer graphics, and a video system that offered more flexibility than many…
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.