The Sharp X68000 is unusually demanding when it comes to CRT setup. Its software can switch between 15 kHz, 24 kHz and 31 kHz display modes, often within the…
Stories
Calibrating X68000 CRT geometry through service mode
Understanding DMA Transfers on the Sharp X68000
The Sharp X68000 was designed around a Motorola 68000 processor, yet many of its most impressive operations depend on hardware moving data without asking the…
Building a USB keyboard adapter for the Sharp X68000
The Sharp X68000 remains an unusually rewarding computer to restore because its hardware invites experimentation. Its keyboard, however, can be difficult to…
Repairing an X68000 Reset Button with a Tactile Switch Mod
The Sharp X68000 is remarkably serviceable for a computer from the late 1980s, but its front-panel controls are now old enough to develop intermittent faults.…
Programming A Human68k GUI With The SX-Windows Toolkit
The Sharp X68000 was designed around a capable Motorola 68000 processor, custom graphics hardware, and a software environment that encouraged experimentation.…
Connecting an X68000 to a wireless network with a Raspberry Pi
The Sharp X68000 remains remarkably useful for a computer designed in the late 1980s. It can run games, development tools, file utilities, MIDI software, and…
Installing a PicoPSU in the X68000 for lower heat
The Sharp X68000 remains a remarkably capable retrocomputing platform, but its original power supply is now several decades old. Aging capacitors, tired…
Using an FPGA to Recreate the X68000 Audio Experience
The Sharp X68000 is remembered for sharp 2D graphics, responsive software, and a sound system that gave Japanese home computing an unusually capable musical…
Restoring a Dead X68000 Floppy Drive with a Belt Replacement
A non-working floppy drive is one of the most common faults found in an aging Sharp X68000. The symptom may be simple: the machine powers up, the disk LED…
Reverse Engineering the X68000 Joystick Port Pinout
The Sharp X68000 is old enough that its controller interface sits between familiar Atari-style joystick wiring and the machine’s own hardware conventions. That…
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.