The caption under the picture of the Xero Alto states: >"We could have featured a minicomputer such as a DEC PDP-11 as an example of a CPU built from 74 series

The caption under the picture of the Xero Alto states: >"We could have featured a minicomputer such as a DEC PDP-11 as an example of a CPU built from 74 series logic. But the 74-driven Xerox Alto makes a greater point about 74 logic as the progenitor of modern computing devices." Can anyone say how many discrete logic chips the CPU for the PDP-11 or the Alto used in the design of their CPUs? Might anyone have some links or suggested literature regarding these pre-microprocessor CPUs?