The original Human68k operating system on the Sharp X68000 was never designed with hobby-grade LED signage in mind, yet the machine's generous memory-mapped…
Stories
Driving an LED matrix from a Human68k program on the Sharp X68000
Modding the X68000 PSU with a Modern ATX Power Supply Adapter
The Sharp X68000 remains an unusually serviceable Japanese computer, but its original power supply is now one of the system’s most important ageing components.…
Installing a CompactFlash IDE adapter in the X68000 internal bay
Replacing a mechanical hard disk with CompactFlash can make an X68000 quieter, cooler and easier to use. It also removes one of the most failure-prone parts in…
Building a Human68k disk read speed benchmark
A small benchmark utility can reveal far more about an X68000 storage setup than a specification sheet. The same machine may show very different results when…
Restoring a Yellowed X68000 Case with Retrobright Methods
A yellowed Sharp X68000 case is a familiar sight to anyone preserving Japanese computers from the late 1980s and early 1990s. The beige plastic may have…
Building an FPGA RGB-to-HDMI Converter for the Sharp X68000
The Sharp X68000 remains an unusually rewarding computer to preserve because its video output sits between familiar home-computer RGB and the more demanding…
Writing a Human68k Archive Tool for X68000 Games
An X68000 game archive tool needs to do more than unpack files from a disk image. It must respect Human68k’s DOS conventions, preserve Japanese filenames,…
Replacing X68000 electrolytic capacitors with polymer alternatives
The Sharp X68000 remains an unusually serviceable Japanese home computer, but its age makes capacitor renewal one of the most valuable preservation tasks.…
Designing a Quiet Heat Sink Solution for the Sharp X68000
The Sharp X68000 remains one of the most revered Japanese home computers of the late 1980s and early 1990s. Original machines from that era are still in…
Repairing X68000 hot-air solder stations for fine-pitch chip removal
Repairing an X68000 often means working around ageing custom LSIs, tightly packed logic devices and boards that have already seen several decades of heat. A…
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.