PAL, GAL and travel to a digital retro

The idea to make digital logical chips with changeable structure was always. Why? It is enough to look at the tolstenny catalog of chips of the TTL 74xx series (or the Soviet K155), that such idea samozarodilas. In the USSR almost each engineer and the radio fan had V. L. Shiloh's reference book "Popular digital chips" which left any improbable circulation. But all the same, there was a wish to have certain "a universal crystal" of which it is possible to make all other chips (well, not everything, but many)...