| 摘要 |
PURPOSE:To eliminate the recalculation back to the first stage for an electronic computer incorporating a printer, by printing the result of addition carried out immediately before an overflow with use of an overflow signal if the overflow is caused during an adding arithmetic. CONSTITUTION:When the addition key on a keyboard 4 is pushed, the contents of a figure register 1 is added with the contents of a result register 2 through adding/ subtracting circuit 8. The result of this addition is stored in the register 2, at the same time the occurrence of an overflow is checked through a deciding circuit 10. When an overflow is decided, a subtraction is indicated to an addition/ subtraction deciding circuit 9 by the overflow signal. Then the contents of the register 1 is subtracted from the contents of the register 2 through the circuit 8. And the result of calculation carried immediately before the overflow is printed by a printer 7. After this, the arithmetic function is stopped, and at the same time the printing action is locked up. |
