Key-operated arrangement for producing code characters

摘要

A key-operated arrangement for teleprinters as a keyboard for encoding characters and data arranged in matrix fashion in rows and columns. Along with the keyboard an addressable fixed-value store is provided. A scanning device periodically scans the keyboard and fixed-value store and produces a coded character from the store when a signal is present which is provided by operation of a contact on the keyboard. At least one additional matrix column is arranged on the keyboard for special functions. A mode register connected via a column selector to the additional matrix column stores signals arriving from the scanning device and converts them into control signals which appear in parallel at outputs of the mode register.