The firmware-iwlwifi package doesn't include the latest drivers for Intel radios. They are, however, included in Linux kernel 3.10.
Would it be at all possible to get the Intel drivers from kernel 3.10 backported for the current Tinycore 5 release, specifically for IntelĀ® Wireless 7260 (3.10) and IntelĀ® Wireless 3160 (3.10)