Recent content by alxlab

There are a few. There's the Intel Overdrive DX4ODPR100 which is an Intel 486 DX4 100MHz with a built in voltage regular. There's also the 5x86 upgrade processors that include the interposer like this Gainberry Cyrix 5x86-100GP and AM5x85-P75: I think it's important to note that after...

You'll need an 486/5x86 interposer to covert the SPU voltage from 5V to the 3V of a Intel 486 DX4 and set the proper multiplier. There's actually a couple of github projects if your up to making your own interposer: 486SocketBlaster 486VRM

Guessing it's a less common 2MB SIMM since all the other DRAM marked with 514400 are 1Mx4 DRAM:

You could try JLCPCB and see what they're charging. Alternatively I could make one for you out of black PETG for $8 USD. I'd have to calculate the shipping though from Montreal to your address. PM me if your interested.

No new tweaks to the design since the last 3D model was released.

Yeah looks like the resistor is out of stock,. The other U1 error can be ignored.

Apple SWIM Chip Adapters This project is for a couple of chip adapters to convert the PLCC-28 and PLCC-44 Apple SWIM chips to DIP-28. The intention of the project was to allow me to use the PLCC-44 SWIM chip from my battery bombed Macintosh Classic in a Macintosh SE to give it 1.44MB floppy...

Glad it ended up just being a simple issue (y)

Your adapter shouldn't be reversed if you have power. I've seen a similar issue with a hard drive when termination was not on but I'm assuming you have your BlueSCSI terminated. I've also seen similar issues with floppy drives in Macs. I have a couple 800k drives that if I put them in my Mac...

I never knew this but it seems that the UV light tends to make flux residue show up as bright yellow. It's useful when trying to clean off all the residue.

This sounds like an interesting project. You wouldn't happen to have the pinouts you've worked out so far posted anywhere would you? I didn't notice them on the original 68kmla post. Regarding the edge connector of the logic board and analog board, we could probably make one out of a separate...

I had bought this particular set off of aliexpress for less than $7 CAD. The uv flash light was real garbage though. Ended up buying the Darkbeam A300 UV flash light instead which was a looooooot better.

If anyone need to remove thermal epoxy from a CPU like this: I've discovered that soaking the chip in acetone overnight will soften the epoxy so it can be scrapped off like butter 🧈 This is way better then all the suggestions I've seen online like using a Dremel or spending hours scrapping.

Here's the board with all the 0.10mm bodge wires . Here's the final result! Great success! I ended up using a replacement chip with no socket. All I can say is that I would recommend using JB Weld to fix pads. I was able to apply 300C for a fair amount of time with no pads detaching again.