XL cpu upgrade

[Jaap Hogenberg <Jaap Hogenberg nl abnamro com>]

Hi,

I recently got hold of an old  DECpc XL 466d2. This is not an Alpha (yet)
but a 486 dx2 machine.
This machine has a CPU daughtercard which can be replaced. The upgrade
path for these machines include Alpha CPU's.
Does anyone know:
- if these Alpha upgrades were actually sold at any point in time 
- were one could get a hold of one (cheap) , preferrably in Holland
- if this is the same motherboard as used in the XL alpha machines ? 
- If I need to get a different "bios" when I replace the CPU board ?
- were there ever dual pentium cpu-boards available ? (Keep in mind I 
already own 
3 alpha's , but I have never owned a pentium (yet)   ;-)

I could not find a lot of info on the digital websites , if anyone knows
where to get more info , that would help a lot too !

TIA,
Jaap





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