What the biggest 286/386 mainboard ever?

[Keatah]

What the biggest 286/386 mainboard ever?

 

I vote it's gotta be one of these -- http://www.redhill.net.au/b/b-92.html

[jaybird3rd]

The Atari PC-4 motherboard is about the same size as the DTK PEM-2500 shown on that site. It uses SIPP RAM sockets instead of DIPs, but it has EGA and VGA monitor outputs, an Atari ST external floppy drive interface, and side-mounted AT keyboard and serial mouse ports. It completely covers the bottom of the case.

I've seen some 386 server motherboards that might have been even bigger, however. These were Intel-brand servers with 16MHz processors, as I recall, and had some of the only EISA slots I ever saw.

[Omega-TI]

GREAT POST!

I had a retro-flashback with the photo of that "CH-386-33A"! I put that very one in a clone that I built for myself back in the early to mid 90's. If I remember right I only used it for about a year before I upgraded again, but it was main "Fight-O-Net Box" that I used to pick up my mail packets in the pre-Internet days.

[JamesD]

I don't have any pics but there have been some pretty large industrial PC motherboards.

If you want to find the largest I'd start there.

[+nanochess]

I remember the IBM PS/2 were one of the bigger I've seen. From here http://www.classic-computers.org.nz/blog/2009-09-27-restoring-a-ps2-70.htm

 

 

Other close ones were the Dell, Acer and Compaq ones. From here a Dell http://www.techpowerup.com/forums/threads/post-pics-of-old-school-hardware-hard-to-find-on-the-net.77104/

 

 

However one of the biggest I've seen was a old Pentium-75/90 one, I think for a Dell server. Filled with screws so it doesn't get bent. Unfortunately I couldn't find pictures in the net.

Edited January 16, 2014 by nanochess