The Intel 4040

The microprocessor of Intel 4040 was the successor at Intel 4004. It was presented in 1974. The 4040 used a technology of silicon-carries PMOS of 10.m and could carry out 60.000 instructions roughly a second.

New devices

• Interruption
• Step by step

Prolongations

• The whole of instruction increased with 60 instructions
• The memory of program increased to 8 KiB
• The registers increased to 24
• The pile of sub-routine increased on 7 levels deeply

Originators

Federico Faggin proposed the project, formulated architecture and carried out the design. The detailed design was made by Tom In.

New pieces of support

• 4201 - The clock 500 generator to 740 kilocycles using of the crystals from 4 to 5.185 megahertz
• 4308 - 1 ROMANIAN of KiB
• 4207 - Port of output of universal use of byte
• 4209 - Input port of universal use of byte
• 4211 - Wearing of universal use of input-output of byte
• 4289 - Interface standard of memory (replaces 4008/4009)
• 4702 - 256 byte UVEPROM
• ROMANIANS of 4316 - of 2 KiB
• 4101 - 256 word RAM of 4 bits

The third processor was Intel 8008 which is not yet as as many others signicant but always an advance in the field of the microprocessors.