Taping a Heatsink to the AMD 486 DX4-100
When I got the LS486 running again, it was running bare. No heatsink, nothing on the processor at all. It POSTed, it sat in the BIOS quite happily, and it was easy to forget that a 100 MHz 486 actu...
felangga
felangga — Personal blog and projects
The LuckyStar LS486 Is Alive Again
The LS486 is back from the dead. When I left off last time, the board was stone dead. No beeps, no POST codes, no 3.3V rail. The prime suspect was a TIP110A transistor, the linear regulator respon...
Reviving a 1992 JK Micro Keyboard with a Custom Arduino Encoder
I’ve had this JK Micro mechanical keyboard sitting around since I bought it back in 1992 (I’ve completely forgotten the exact model number at this point, sorry). It’s got genuine Cherry MX switches...
A Dead 486 DX4-100 from the Junk Shop
I was at a local junk shop last week and spotted something that immediately caught my eye: a 486 motherboard with a CPU still in the socket. For the uninitiated, these are getting pretty hard to fi...
PicoMem IRQ Conflict with my Sound Blaster 16
I installed my PicoMem on my 486 machine, and by default it comes configured to use IRQ 5. Everything seemed fine at first, but I started running into weird issues once I had my Sound Blaster 16 in...
Macintosh Classic II New Analog Board
The Issue It’s been a while since my last post about restoring the Macintosh Classic II (link). At the time, the machine was still suffering from intermittent brightness issues, it would boot up wi...
Unusual Apple II
Apple II Europlus So I just picked up an Apple II Europlus off Instagram. The seller said it was brand new and never used, and honestly, the case is still in great shape. The motherboard’s way cl...
PicoMem won’t boot – No Green Light
I got my PicoMem a couple of weeks ago, and it had been running great—until yesterday. Out of nowhere, it just stopped booting. The BIOS wouldn’t come up at all. The AdLib module still had its red...
HackRF Mayhem Failed to Update - M0 Guru Meditation Hard
I was on Mayhem Portapack v2.0.1 and want to upgrade to the latest stable release v2.1.0. The update went okay using the web upgrade https://hackrf.app/. But then I saw the latest nightly update an...
Macintosh Classic II Brightness Issue
The Issue My Macintosh Classic II suffers from an issue where the display CRT goes dim after a few minutes on a cold boot. Every time it happens, I need to crank up the cut-off and brightness pot ...