DATAmatic 1000

The DATAmatic 1000 is an obsolete computer system from Honeywell introduced in 1957. It uses vacuum tubes and crystal diodes for logic, and featured a unique magnetic tape format for storage.

The CPU uses a 48-bit word (plus four check bits). A word can hold 12 decimal digits (11 digits plus sign) or 8 six-bit alphanumeric characters. The system includes magnetic core storage of 2000 words or 24,000 digits in two banks, called "High-Speed Memory." Words in High-Speed Memory are also called "registers" in the documentation.: p.1–3  The system also includes two input and two output tape buffer storage units of 62 words (744 digits) each.: p.0–5 

The instructions are three address and all operations are storage-to-storage.

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