Intel C4040 Vintage Processor (Engineering Sample)

This is an Extremely Rare Engineering Sample of the C4040 Microprocessor in White Ceramic and is the only one I have.

The Chip is marked with “ES” which stands for “Engineering Sample” and as such were used for testing in various way but very few were produced with this marking making it an extremely rare chip.

The 4040 Microprocessor was the Second Microprocessor Developed by Intel after the 4004 Processor.

The Intel 4040 microprocessor was the successor to the Intel 4004. It was introduced in 1974. The 4040 employed a 10 μm silicon gate enhancement load PMOS technology, was made up of 3,000 transistors^[2] and could execute approximately 62,000 instructions per second.

General performance, bus layout and instruction set was identical to the 4004, with the main improvements being in the addition of extra lines and instructions to recognise and service interrupts and hardware Halt/Stop commands (the latter allowing operator-controlled single-stepping for debugging purposes), an extended internal stack and general-purpose "Index" register space to handle nesting of several subroutines and/or interrupts, plus a doubling of program ROM address range.

I can assure any buyers that the prices for these vintage Chips will rise significantly over the coming years as they have done so over the past 30 years so it will be a good investment for them as the majority of the older chips have been scrapped for their gold content.