| 摘要 |
PURPOSE:To confirm stepwise the start of an IPL by providing a flip-flop which is set by an initial program loader IPL start request signal and reset by a specified instruction, and lighting and displaying its state. CONSTITUTION:When an IPL start switch IPLSW is turned on, a specified flip- flop in a flip-flop group FFG becomes on, and when the specified flip-flop becomes on, a pulse is generated from a one shot trigger circuit TRG, and an IPL in a central control device CC is started. At the same time, the flip-flop FF is set, by which a lamp LED is lighted. When the IPL is started, in the central control device CC, the flip-flop FF is reset by the specified instruction inserted in the head of the IPL and the lamp LED is turned off. |
