The Sharp X68000 invites unusual hardware experiments because its expansion ecosystem sits between Japanese home computing and late-1980s workstation design. A…
Stories
Building a passive ISA to X68000 C-Bus adapter
Restoring an X68000 CRT Power Supply With New Capacitors
The Sharp X68000 remains one of Japan’s most distinctive home computers, but age is now a greater threat than software compatibility. A CRT-equipped machine…
Using a Bus Pirate to Probe the X68000 Expansion Bus
The Sharp X68000 is an excellent platform for learning how late-1980s computers moved data between the CPU, memory, custom chips and expansion hardware. Its…
Understanding the X68000 BIOS and Boot ROM Structure
The Sharp X68000 does not have a single BIOS in quite the same sense as a modern PC. Its startup firmware is divided between the IPL ROM, hardware…
Adding a Hardware Write-Protect Switch to an X68000 Internal HDD
A physical write-protect switch can make an X68000 much safer to use for archival disks, recovered software and experimental system files. The aim is simple:…
Repairing a Rolling X68000 CRT Image
A vertical hold fault is one of the more recognisable problems on an X68000 CRT display. The picture may slowly roll upwards or downwards, jump between locked…
Building An X68000 Scan Converter For Modern Monitors
The Sharp X68000 produces a video signal that belongs to the era of multiscan CRT displays, while most modern monitors expect HDMI, DisplayPort or a narrow…
Building a Human68k file manager with a text mode UI
A file manager is an excellent way to learn how the Sharp X68000 turns a simple command-line environment into an interactive desktop tool. The project combines…
Installing a 3.5-inch hard drive in an X68000
Adding a 3.5-inch hard disk to a Sharp X68000 can make everyday use considerably easier. Games load faster, disk swapping is reduced, and utilities, compilers…
Restoring the X68000 keyboard membrane with conductive paint
The keyboard is one of the most heavily used parts of an aging Sharp X68000. A computer may still boot cleanly, read disks and display a sharp image, yet a…
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.