The Sharp X68000 is remembered for its distinctive twin-tower silhouette, but its identity also lives in smaller details: the front-panel decals, Japanese…
Stories
Restoring the X68000 Front Panel Decal and Labels
Using the X68000 ADPCM For Chiptune Music Playback
The Sharp X68000 has a distinctive sound architecture built around the Yamaha YM2151 FM synthesizer and an OKI MSM6258 ADPCM circuit. The FM chip creates…
Adding Reset and Power LEDs to the X68000 Front Panel
The Sharp X68000 has a front panel designed around clear mechanical controls, status indicators, and a distinctive vertical case. Adding a power LED or a reset…
Overclocking the X68000 CPU: Risks and Experiments
The Sharp X68000 invites experimentation because its hardware is unusually visible and accessible. Clock generators, expansion connectors, memory boards, video…
Building an Arduino SCSI to SD card bridge
A compact SD card can provide a practical replacement for aging hard disks, removable media, and unreliable SCSI storage in an X68000. The attractive part is…
Repairing the X68000 power supply fan bearing
A noisy or hesitant fan is one of the clearest warning signs in an aging Sharp X68000. The sound may begin as a light rattle, become a dry scraping noise, or…
Creating a microSD card adapter for the X68000
The Sharp X68000 remains an unusually capable Japanese home computer, but its original storage options are increasingly difficult to maintain. SCSI hard disks…
Converting an X68000 game to run from a RAM disk
Running an X68000 game from a RAM disk is a practical way to reduce floppy access, shorten loading times, and protect aging disks from unnecessary use. The…
Testing the X68000 video DAC with a pattern generator
The video DAC is one of the most important points in the Sharp X68000’s display chain. It converts the computer’s digital colour information into analogue RGB…
Understanding the X68000 CoCo And Its Uses
The Sharp X68000 is often remembered for its Motorola 68000 processor, excellent Yamaha sound hardware, and unusually capable graphics system. Less visible,…
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.