The Sharp X68000 shipped in an era when computer displays spoke many different dialects. Its built-in video hardware can push gorgeous 768×512 pixel images…
Stories
Adding RGBHV VGA output to the Sharp X68000
Repairing the X68000 Real Time Clock with DS3231 and I2C
The Sharp X68000 keeps system time through a small Real Time Clock circuit on its mainboard. After three decades, those original RTC chips often drift, lose…
Writing a Human68k Boot Screen System Information Program
The Sharp X68000 remains one of the most elegant home computers ever produced, and getting it to greet you with useful hardware details on power-up feels like…
Building a SCSI ID selector switch panel for X68000 external drives
The Sharp X68000 originally relied on a combination of internal jumpers and the position of each device on the daisy chain to decide which peripheral spoke…
Building a Human68k disk surface scan utility with block verification
The Sharp X68000 remains one of the most architecturally distinctive home computers ever produced, and keeping a fleet of these machines running in the present…
Installing a Speaker Volume Potentiometer Inside the Sharp X68000
The Sharp X68000 shipped with a small internal speaker tucked behind the front grille, useful for monitor confirmation but notoriously limited in output level.…
Bringing Back the Write-Protect Sensor on an X68000 Floppy Drive
The Sharp X68000 shipped with 3.5-inch floppy drives that were state of the art in the late 1980s, and four decades later their mechanical subtlety is starting…
Building a Human68k utility to unpack LZSS-compressed game files
The Sharp X68000 remains one of the most elegant personal computers ever shipped in Japan, and a small but determined scene across Australia keeps the platform…
Designing a custom backplane for the Sharp X68000 expansion bus
The Sharp X68000 was never designed to live inside a 19-inch rack, and it shows. Its expansion slots sit at the rear of the chassis, almost flush with the I/O…
Capturing Human68k boot traces with a USB logic analyzer
When the Sharp X68000 powers on, a small choreography of signals races across the motherboard before the familiar Human68k prompt ever appears. The 68EC000 or…
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.