The Sharp X68000’s CRT is one of the defining parts of the machine’s character, and its picture depends on more than the tube, flyback transformer and video…
Stories
Restoring the X68000 CRT degaussing circuit
Understanding X68000 graphics modes for smooth scrolling
The Sharp X68000 is remembered for sharp arcade conversions, colourful computer games and unusually capable graphics for a Japanese home computer of its era.…
Adding a Hardware Switch to Disable the X68000 Internal Floppy
The Sharp X68000 was designed around its internal floppy disk drive, so disconnecting that drive is more involved than simply removing a cable. A switch can be…
Debugging an X68000 boot sequence with a serial console
A Sharp X68000 that fails to start can appear completely silent, but silence does not mean that every subsystem is dead. The machine may have reached the IPL…
Building an X68000-Style SCSI Hard Drive Enclosure
A well-designed external SCSI enclosure can make an X68000 setup feel like a complete workstation rather than a computer connected to a random beige…
Installing a Front USB Port on the X68000 for Easy File Transfers
The Sharp X68000 remains remarkably usable when its ageing storage, connectors and power circuitry are treated carefully. A front USB socket can make…
Bringing Vintage X68000 RF Output Back to Life
The Sharp X68000 was designed for a television environment that has largely disappeared. Its Japanese-market RF circuitry once offered a convenient way to…
Understanding the X68000 interrupt controller registers
The Sharp X68000 is built around the Motorola 68000 family, so its interrupt system follows a very different model from a modern microcontroller. Devices do…
Repairing X68000 CRT Flyback Whine with Capacitor Replacement
The Sharp X68000’s CRT display is one of the most distinctive parts of the system. Its bright text, scanline character and compact Japanese monitor design are…
Using an SD card reader on the X68000 SCSI bus
An SD card reader can give an X68000 a quiet, convenient replacement for ageing hard disks and difficult-to-source SCSI media. With the right adapter, a modern…
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.