Are there any detail exposition of Consciousness without surface (viññanam anidassanam)?

I asked this question recently to understand why consciousness is different from the intellect itself and considering the answer given I now think that Consciousness is not something higher than intellect but just the working of intellect i.e. "consciousness of". But now I encountered another type of consciousness Consciousness without surface (viññanam anidassanam) which seems to be beyond the intellect itself, as Bhikkhu Thanissaro explain it here it is beyond the six sense media. I read somewhere else that it is consciousness of arising of Dhammacakka, The Eye of Wisdom. Could you please direct me to a detailed exposition of this type of consciousness, if any. Thanks a mil.