to me the entire odyssey thing is like this: the oddy has its own standard powersource and is integrated nto the entire powergrid. then they got a zpm, and integrated it aswell. now they got a asgard computercore with a powercore, wich is tied to the powersystems but not integrated. the zpm can power the computercore, but doesnt. the powercore can power the ship but doesnt. the problem was caused due to the statement"the timedialation field is powered by the zpm and the powercore". carter MADE the zpm power it, or perhaps the core did it itself. but the point is, bot are capable of powering the ship and the computercore. its just, both powersources are separated from eachother, because otherwise the ori could track them.
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