Electronic cash register with programmable mode/function key set

Details Electronic cash register with programmable mode/function key set Electronic cash register with programmable mode/function key set

1982-09-09

1988-08-23

Smith, Jerry

Boots, shoes, and leggings

G06F 1521

Patent

active

047665408

ABSTRACT:
The invention provides an electronic cash register which compares mode position data specified by a mode switch, with preset mode data associated with data representing a pressed one of a plurality of function keys and which is read out from a memory, the preset mode data serving to indicate whether or not the pressed key is valid in view of the specified mode position data. If the pressed function key is determined to be an invalid key, processing corresponding to the pressed function key is prohibited by a CPU.

REFERENCES:
patent: 3703987 (1972-11-01), Ikeda
patent: 3943309 (1976-03-01), Kawamoto et al.
patent: 4245311 (1981-01-01), Nakamura
patent: 4570223 (1986-02-01), Yoshimoto

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