A digit trunk is a shared communication link or wiring system that serves as a common connection point for two or more circuits, allowing them to exchange digital signals. It consists of multiple parallel conductors that route data, addresses, or control signals across a system. Engineers in later eras adopted the term bus to describe this exact same architecture.
Check the digit trunk routing on that old schematic to see where the memory controller taps in.
You will mostly encounter this term when reverse-engineering older mainframe schematics or reading historic computing literature.
Also heard as
- bus
Related terms
System bus
A shared communication pathway that links the CPU, memory, and peripherals in a computer.
Address bus
A set of wires used by a processor to specify the physical location of data in memory.
Control bus
A set of physical connections used by a central processing unit to communicate control signals to other hardware.