The chaining kind of reminds me of how z80's ALU works [1]. It's kind of chained in together over time. [1] http://www.righto.com/2013/09/the-z-80-has-4-bit-al

The chaining kind of reminds me of how z80's ALU works [1]. It's kind of chained in together over time. [1] http://www.righto.com/2013/09/the-z-80-has-4-bit-alu-heres-how-it.html http://www.righto.com/2013/09/the-z-80-has-4-bit-alu-heres-h...