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Flexible Electronic Keyboard Disclosure Number: IPCOM000070191D
Original Publication Date: 1978-Aug-01
Included in the Prior Art Database: 2005-Feb-21

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Related People

Dobson, DR Hooker, RW [+details]


An electronic keyboard incorporates extra key positions which may be added to the keyboard to provide additional key functions. Each keyboard position is uniquely associated with a position of a read-only storage unit. A keyboard address causes the read-only storage to gate keyboard function information from its associated position to control magnet selection for printing or the like. A special "no-op" code is stored in those read-only storage locations corresponding to unused key locations. The system logic ignores such "no-op" signals, thereby permitting such unused locations to be acted upon electronically without changing the basic clocking address structure to match the physical parameters of each unique keyboard arrangement.