The mother of all motherboards

[asian1]

Hi
There is an old  multicomputer standard by Ziatech / Intel

There is a Panda Computer design 10 years ago and Deskstation company.

http://www.byte.com/art/9510/sec6/art7.htm

11 years ago, I use YARC PowerPC 601 SMP cards inside ordinary Dell Pentium I PC with TAOS, a pre-cursor of Intent. Amiga DE is based on Intent.

[asian1]

>Replacing CPU opening case.

Hi
I also remember a strange old Tandon PC with CPU + memory module that can be replaced without opening the case. AFAIK the only available CPU is Intel 286, 386, (or 486?).

On several old PC, the vendor put 486 CPU socket at the bottom side of PCB. The user can open a small trap door at the bottom of the case and replace the CPU.

Stratus, and Compaq Fault Tolerant Systems (Himalaya) enable user to replace CPU modules without turning off the entire system.

>Different bus.

Perhaps you can use CompactPCI (HP, Ziatech), VME or Infiniband (12 Gbps) bus.

>Without motherboard
Perhaps you can use a complete System On Chip.

[asian1]

>PCI card

Hi
Perhaps you can use Slotserver or similar cards:

http://www.14south.com/products/products.shtml