This Item is a Rare Intel D4040 Microprocessor in Grey Ceramic with Tin Pins as per the Photos. The D4040 has been tested and show it is in Good Operating condition. The Date Code on the bottom of the Chip indicates that it was manufactured during in week 15 of 1980 in the Philippines. 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 recognize 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.
