To be fair most devs at the time completely ignored the second CPU because it was apparently very hard to make them work together. So they treated it as a single CPU console. Which kinds of defeats the purpose :)
Going by the Wikipedia description of it, they had multiplexed RAM access. So developers could choose between having two CPUs at half the RAM speed (4KiB CPU-local cache are enough to make up for it, right?) or a single CPU at full RAM speed.