A bootable diagnostic ROM can turn an X68000 expansion slot into a practical service tool. Instead of relying on a working hard disk, floppy drive or…
Stories
Building a bootable diagnostic ROM for the X68000 expansion slot
Reviving an X68000 Floppy Drive Spindle Motor
A tired floppy drive can make an otherwise healthy Sharp X68000 seem unusable. The machine may boot from hard disk or CompactFlash, yet fail whenever it needs…
Using an Oscilloscope to Measure X68000 Power Supply Ripple
The Sharp X68000 is old enough that a working power supply should be treated as a component under investigation, not an automatic sign of good health. A…
A Hardware Real-Time Clock for the X68000 Expansion Bus
The Sharp X68000 remains unusually rewarding to modify because its expansion architecture exposes enough of the machine to make practical hardware projects…
Restoring X68000 CRT Screen Burn with Pattern Cycling
The Sharp X68000 is remembered for sharp RGB output, distinctive Japanese arcade ports and a display system that still feels unusually direct. Many surviving…
Building a Custom X68000 Case with Modern Cooling Vents
The Sharp X68000 has a distinctive vertical form that makes it instantly recognisable, but its original enclosure was designed for a different era of heat…
Installing a SCSI2SD Inside the X68000
The Sharp X68000 remains remarkably usable when its original storage hardware is treated with care. A SCSI2SD board can replace an ageing hard disk, provide…
Build an X68000 USB Keyboard Adapter with a Raspberry Pi Pico
The Sharp X68000 remains one of the most interesting Japanese home computers of the late 1980s and early 1990s. Its distinctive tower case, capable custom…
Repairing the X68000 floppy drive front-panel eject button
The Sharp X68000’s floppy drive eject button is a small part with an outsized effect on usability. When it cracks, sticks or stops reaching the drive’s release…
Building an External SCSI CD-ROM Drive for the X68000
The Sharp X68000 was designed around SCSI storage at a time when CD-ROM drives were becoming an important part of Japanese computing. An external optical drive…
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.