I'm sure It is possible but it would involve building custom circuits and lots of soldering small wires and components.Even If you find a diagram telling you exactly what to do It would probably take weeks of working all day and cost you several times what buying a dual processer board would. So eventhough it is most likely possible it is completely impracticle and should not be attemped.
i want to connect them so that i can use them as one machine not connected through a LAN, and i happen to have the small budget of £0 lol,but i can get spare parts of pc's with ease. i have ran out of IDE ports on my Motherboard, but i need more so can i connect another motherboard through there IDE slots and use that ones IDE slots or would i have to use it through a LAN??
ALSO when i turn my pc off it comes up with "it is now safe to turn off ur pc" how do i stop this and make it do it automatically, ( i did know but i forgot because i havent done it for a long time lol)
Go into the Control Panel, then into Power Options. Click the APM Tab or Advanced Tab, Select Enable Advanced Power Management Support, or when I hit the power button on my computer “Shut Down” and then click OK.
As far as wanting more ide channels, why don`t you just buy a pci ide card. They are very cheap.