A buzzing Sharp X68000 monitor can be alarming, particularly when the noise changes with screen brightness, resolution, or the position of an on-screen image.…
Stories
Repairing Flyback Transformer Buzz in an X68000 Monitor
Installing a Super Nintendo Style Controller on the X68000
The Sharp X68000 is an excellent match for a Super Nintendo-style gamepad. Its library includes shooters, action games, platformers, and arcade conversions…
Restoring the X68000 floppy drive head alignment
The floppy drive is one of the most failure-prone parts of a Sharp X68000. Age hardens belts, weakens eject mechanisms, contaminates read heads, and leaves…
Testing X68000 power supply voltages with a multimeter
The Sharp X68000 is remarkably durable for a computer released in the late 1980s, but its power supply is now old enough to deserve careful inspection. A…
Understanding X68000 Graphics Modes in Practice
The Sharp X68000’s visual hardware is easiest to understand as a set of cooperating layers rather than a single display mode. Text characters, bitmap graphics,…
Adding a reset button to the X68000 for convenience
The Sharp X68000 remains remarkably usable for a computer designed in the late 1980s, but its original control layout reflects a different era. A reset…
Repairing a broken X68000 memory card slot connector
The memory card slot on a Sharp X68000 is a small component with a large effect on usability. When its contacts no longer grip a card, the machine may fail to…
Creating a font ROM replacement for the X68000
The Sharp X68000 is remembered for its arcade-quality graphics, distinctive industrial design, and excellent Japanese text handling. Much of that character…
Calibrating X68000 Floppy Drive Speed with an Oscilloscope
The Sharp X68000’s floppy drive is remarkably serviceable for its age, but reliable disk operation depends on mechanical accuracy as much as on the drive…
Building a Custom Prototyping Board for the X68000 Expansion Bus
The Sharp X68000 expansion bus offers a practical way to add hardware without permanently altering the computer’s main board. A carefully designed prototyping…
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.