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Intel 4004 emulator

                              I/O   I/O   I/O   I/O   Vdd    CM   TEST  RESET
                               --    --    --    --    --    --    --    --
                              |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
                           ---    --    --    --    --    --    --    --    ---
                          |    16    15    14    13    12    11    10     9    |
                          |                                                    |
                          |           ##      ###         ###           ##     |
                          |          ###    ##   ##     ##   ##        ###     |
                           --       # ##   ##     ##   ##     ##      # ##     |
                             |     #  ##   ##     ##   ##     ##     #  ##     |
                             |    #   ##   ##     ##   ##     ##    #   ##     |
                           --    #######   ##     ##   ##     ##   #######     |
                          |           ##    ##   ##     ##   ##         ##     |
                          |           ##      ###         ###           ##     |
                          |                                                    |
                          |     1     2     3     4     5     6     7     8    |
                           ---    --    --    --    --    --    --    --    ---
                              |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
                               --    --    --    --    --    --    --    --
                               D0    D1    D2    D3    Vss   Ph1   Ph2  SYNC

Development in progress

Simple emulator of the Intel 4004 chip.

The Intel 4004 was the first computer that I made an emulator, unfortunately I lost the code. Since then I have been studying and assembling small emulators and studying the architecture of computers and embedded devices. After a long time I am going back to the emulators, and the first one that I will focus on development is the Intel 4004, because it is a simple device with a few instructions (46 instructions).

Intel 4004

Intel 4004 is a 4-bit CPU released by Intel in 1971, which was the first commercial programmable microprocessor.

Compile

Inside the root dir of the project.

mkdir build && cd build
cmake ..
make

That create the executable 4004_emulator.

References

If you don't know anything about intel 4004, your wikipedia page is a good place to start.

Brief history of the Intel 4004. Intel's First Microprocessor

4004 Datasheet*

MCS-4 Assembly Language Programming Manual - December 1973*

Recommended online emulator: Emulator - Assembler - Disassembler

License

MIT