The Sharp X68000 is an unusually rewarding platform for hardware experimentation. Its 68000 processor, custom graphics and sound devices, expansion connectors,…
Stories
Using an FPGA to simulate an X68000 main board for peripheral testing
Modding X68000 Joystick Ports for Atari-Compatible Controllers
The Sharp X68000 has a distinctive place in Japanese computer history, yet its original controllers can be difficult to find, expensive to ship, and…
Replacing X68000 power supply capacitors safely
The Sharp X68000 remains remarkably usable decades after its release, but its power supply is now one of the machine’s most common failure points. Electrolytic…
Installing a Gotek Floppy Emulator with an OLED Display in the X68000
Replacing a failing floppy drive is one of the most practical upgrades for a Sharp X68000. A Gotek floppy emulator can load disk images from a USB stick,…
Reflowing solder joints on the X68000 motherboard to fix memory errors
Intermittent memory errors on a Sharp X68000 can look like bad DRAM, a failing expansion board, corrupted disks, or an unreliable power supply. Sometimes the…
Building a compact flash IDE adapter for the X68000 internal drive bay
Replacing a tired hard disk with CompactFlash can make an X68000 quieter, cooler and easier to maintain. A solid-state card has no spindle motor, avoids the…
Understanding the X68000 Floppy Controller for Custom Disk Formats
The Sharp X68000’s floppy controller sits between two very different worlds. At the physical level, it deals with magnetic transitions, track positioning, head…
Repairing the X68000 CRT Horizontal Sync Circuit
The Sharp X68000 remains one of the most interesting Japanese home computers ever built, largely because its video hardware was designed for arcade-style…
Installing a Silent Fan in the X68000 Power Supply Unit
The Sharp X68000 remains remarkably usable, but its original cooling hardware is now old enough for noise, vibration and intermittent starting to become…
Creating a custom X68000 boot logo splash screen
The Sharp X68000 has a visual character that begins before a game, demo or utility reaches its title screen. The dark display, crisp Japanese system text and…
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.