General descriptionHER/12 is a parallel registers-based 12-bit mini-computer built from discrete Small and Middle Scale of Integration (SMI, MSI) integrated circuits of the 7400 series. It does not employ LSI components other than semiconductor Random Access Memory (RAM) chips.
The machine consists of the CPU equipment and up to 16 external peripherals connected to the CPU via I/O channels (as opposite of external bus).
The CPU contains the main memory, organized in 4096 words of 12 bits each. Memory expansion is possible through RAM-DISK peripherals connected to channels. RAM-DISKs are block devices with maximum capacity of 256 Mwords.
Other peripherals could be: printers, punch tapes, magnetic tapes, serial ports, D/A and A/D, GPIO, real-time Timers and many others.
The CPU is operated by the mean of a Console located in the front of the CPU. Software and data can be entered into memory either manually (using the Console) or from external support such as punch tape or magnetic tape.
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