Premature Alzheimer?

The schematic isn't very simple either - I counted 20 logic gates, 4 flip-flops, 2 8-bit counters, 2 6-bit comparators, 2 6-bit latch registers, one multiplexer and a 64x4 bit RAM. Also present are a clock generator, 6 input switches and 38 output indicators. Moreover, the whole layout (especially the I/O parts) produces the feeling that the schematic was printed from a logic simulator, not a plain CAD application.

Now, I'm the first to admit that my memory never was one of my major strong points, quite the opposite. But the effort needed to produce this schematic looks non-trivial, and I'd expect that it would have left at least some memory or impression on my mind, and I'm baffled that it has not.