| 摘要 |
Each mode like registration, check, and account in an electric cash register is assigned to specific code by numerical or special keys on the board. The circuit comprises a keyboard (100), a numerical flag cct. (200), a first gate cct. (300), an accounting start flag cct. (400), a set key memory cct. (500), a comparator (600), a counter (800), a mode RAM (900), a decoder (1000), a mode flag cct. (2000), a second gate cct. (3000), and a displayer (4000).
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