The Sharp X68000 was designed around Japanese RGB monitors that commonly accepted a 15kHz horizontal scan rate. Modern VGA displays, LCD panels, and many…
Stories
Building a VGA Adapter for the X68000 15kHz RGB Output
A battery-backed real-time clock for the X68000
The Sharp X68000 was designed to keep track of time even when switched off. Its real-time clock supports file timestamps, scheduled operations, system…
Adding a socketed EPROM BIOS to the X68000 for easy upgrades
The Sharp X68000 remains unusually rewarding to repair because its hardware is accessible, well documented, and still supported by an active enthusiast…
Repairing the X68000 Floppy Drive Eject Mechanism
The floppy drive is one of the most frequently used and most vulnerable parts of a Sharp X68000. Years of storage, repeated disk swaps, hardened grease, and…
Using CompactFlash Storage on the X68000 SCSI Bus
Replacing an aging hard disk is one of the most useful upgrades for a Sharp X68000. Original SCSI drives are noisy, slow by modern standards, increasingly…
Recapping the X68000 Analog Board for Stable RGB Output
The Sharp X68000 is famous for sharp RGB graphics, fast arcade-style scrolling, and a display system designed around Japanese multisync monitors. After several…
Writing a Human68k Driver for the RTL8019AS Ethernet Chip
Connecting an X68000 to a modern local network is more than a matter of wiring an RJ-45 socket to an expansion board. The RTL8019AS is a familiar and…
Building a DIN MIDI Interface for the Sharp X68000
The Sharp X68000 is a remarkably capable platform for music, games, and experimental hardware. Its expansion architecture also makes it an appealing subject…
Installing A SCSI2SD Adapter In The X68000 For Reliable Storage
The Sharp X68000 is old enough that its original hard disk may be noisy, unreliable, or completely unusable, yet the machine remains practical when its storage…
Replacing the X68000 CMOS Battery Without Losing Settings
The Sharp X68000 stores more than the current date and time in its battery-backed memory. Depending on the model and system configuration, the backup circuit…
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.