Complete Artwork, Schematics, and Simulator - Intel 4004 The 4004 CPU MCS-4 Schematics. The 4001 ROM; The 4002 RAM; The 4003 Shift-Register; The 4004 CPU; Scans of the original 4004 schematics (three drawings) are available from the Intel Corporate Archives, along with scans of the manual mentioned above and the 4004 mask proofs. These were transparencies bound together for reference purposes, not the original lithographic masks. Original Schematics of the Intel 4004 Microprocessor A testimonial from Federico Faggin, designer of the 4004 and developer of its enabling technology. Original Schematics of the Intel 4004 Microprocessor. Definition of Microprocessor: Microprocessor is the name for the central processing unit of a computer (CPU) integrated into a single chip of silicon.