| 摘要 |
PURPOSE:To facilitate a test for every function at a test time by providing a control key, which permits the input from an input part independently of the result of a checking means, on a keyboard. CONSTITUTION:When a pass key P on a keyboard 1 is depressed in case of the test, a control part 2 sets signal ''1'' to a register Rp. A checking part 6 takes out a goods code A in an input register Ri and performs the modulus check processing for it. If the result is good, a permission signal B1 is sent to a display control part 7. If the result is bad, an error detection signal N1 is outputted to start a discriminating part 9. The discriminating part 9 checks whether contents of a register (flag) F1 are set to signal ''1'' or not. If signal ''1'' is set, a permission signal B2 is outputted, and input permission indication is outputted to a display part 8. |
