The 4004 is often introduced as a “4-bit CPU.” That name is accurate, but it is easy to misread.

Those four bits are not a miniature byte waiting to grow up. They are the natural width for one decimal digit when you store numbers in BCD (Binary-Coded Decimal): one digit per nibble, values 0–9 in ...

If you are used to modern architectures where you simply "store a value in an address," the Intel 4004 is here to politely remind you that life was not always this easy. In the 1971 world of the 4004, accessing RAM is more like a ritual than a command.

The "SRC" Ritual: Look, but don't touch (yet ...

Welcome to the Quadium 4004 Workbench dev-log.

If you are here, you probably share a specific kind of madness: an obsession with the dawn of the microprocessor era.
Quadium didn't start as just another project; it started as a necessity. I wanted a professional-grade, reliable environment to ...

Hi everyone, Jaime here.

I’m the developer behind Quadium 4004 Workbench.

I built this forum as a proper place for technical discussion around Quadium 4004 Workbench and the Intel MCS-4 / 4004 world.
If you’re into low-level computing, early microprocessors, or emulation workflows, you’re in the ...