nice!!!!
post some pics of the mobo + cpu 😁 too!

Nice 486, how much did that set you back?
What OS are you running?

It's hard to say how much it cost me, because I've been working on it for 7 years...but probably something like $400.

I'm running PC-DOS 2000 and WFW311.

ah, pc-dos, the choise of win 😀 too bad 2000 does not have FAT32 support...
thanks for the pics too:)
so the transposer is just a bridge between 2 legs? is this fix specific to this mobo?

@Anonymous Coward

i see you ditched the socket 4 mobo which you in this case and the full tower you had the Everex Eisa mobo in?

Yeah. The socket4 motherboard developed some loose solder joints, and I just don't have the time to repair it.

The interposer in the photo fits in between the socket3 and the VRM. It's purpose is to hard wire write thru cache. It's not specific to this motherboard, but to the am5x86 chip. If you try to run WB mode on a board that only supports WT, it can cause DMA problems.

Converted to AT using an ebay kit.

Nice rig!

Where did you find this kit, how is/was it called ?
I see lots of kits to convert Power Supplies, but I can't seem to track down a kit to convert an ATX case. Would be fun to get a reference.

My understanding is that the mounting points in ATX cases should still line up with AT motherboards. However, I have only ever used Inwin cases, so perhaps they were designed with AT boards in mind. Try mounting an AT board into a random ATX case and see how it goes. If it fits, all you need is the power adapter cable and one of these:

http://store.thirtyday.com/atioshbaplal.html

Anonymous Coward, I would love to see some benchmarks for this incredible looking machine. If possible:

Speedsys, 3DBench (1.0 and 1.0c), PcpBench, Shiny "CPU/Video Gamers Performance Test v1.4" benchmark program, Quake timedemo demo1 [full screen], Doom -timedemo demo3 [full screen], WinTune 2 [for Windows 3.whatever], and anything else you can think of.

Thanks a lot if possible.

I won't have access to the machine until June. But I'd be more than happy to do this for you.

Anonymous Coward: since you mentioned. That you took a Soundblaster Pro 2.0

What about making a midi box like Silent Loon made in his thread in his thread ?

my little Midi box

Since I seriously doubt you want to buy miditemps expensive DoXintheBox "box".

Anonymous Coward wrote:

Yeah. The socket4 motherboard developed some loose solder joints, and I just don't have the time to repair it.

The interposer in the photo fits in between the socket3 and the VRM. It's purpose is to hard wire write thru cache. It's not specific to this motherboard, but to the am5x86 chip. If you try to run WB mode on a board that only supports WT, it can cause DMA problems.

I've never seen a socket 4 motherboard. Any pics?

sliderider wrote:

Anonymous Coward wrote:

Yeah. The socket4 motherboard developed some loose solder joints, and I just don't have the time to repair it.

The interposer in the photo fits in between the socket3 and the VRM. It's purpose is to hard wire write thru cache. It's not specific to this motherboard, but to the am5x86 chip. If you try to run WB mode on a board that only supports WT, it can cause DMA problems.

I've never seen a socket 4 motherboard. Any pics?

There's a thread about socket 4 here Socket 4 Pentium

DonutKing wrote:

sliderider wrote:

Anonymous Coward wrote:

Yeah. The socket4 motherboard developed some loose solder joints, and I just don't have the time to repair it.

The interposer in the photo fits in between the socket3 and the VRM. It's purpose is to hard wire write thru cache. It's not specific to this motherboard, but to the am5x86 chip. If you try to run WB mode on a board that only supports WT, it can cause DMA problems.

I've never seen a socket 4 motherboard. Any pics?

There's a thread about socket 4 here Socket 4 Pentium

I realized after I posted that I was thinking about Socket 6 and not Socket 4. I've seen the P60/66 motherboards before. Wikipedia says Socket 6 was a very late update to the Socket 3 for 486's.

I don't think Socket 6 was ever produced. Wouldn't be very sensible, Socket 3 was already capable of supporting virtually all Socket 3 class cpu's ever made and 486 was nearing the end of it's life anyway.

Iirc Socket 6 would've been 3.3v only?

Can you elaborate more on that ATX conversion?

How does this work exactly. I'm guessing the screw holes line up for the standoffs to work internally, but AT/baby AT had 8 expansion slots, and ATX has 7. Does your case have 8 slots, or is the first or last slot just not available to put cards in?

I remember in the late 1990s, having a case that was ATX but it came with a motherboard back plate that allowed me to install an AT motherboard as well.

I have some speedsys results for those interested. I didn't test the HDD, because it's slow as hell. I'd really like to get a Cyrix 5x86-120 working in this system, but it just isn't cooperating.

Also, sorry about my slow reply to your question about ATX. The case has 7 slots, and the 8th slot is not available (externally at least). Here's what it looks like at the back (this is an older picture with a different guts in the same case)

@Anonymous Coward

Might be time to throw in a modern, fast and silent 68p SCSI HDD like a nice 10k rpm of faster 18gig drive...they are quite cheap nowdays and the last one's made are quite silent
Another idea is top use an IDE drive with an acard SCSI->IDE adapter

Still haven't got around using my Everex version of your mobo, 🤣