| 摘要 |
<p>PURPOSE:To eliminate the need for an uneconomical console, by storing a word area clearing program for a part of a monitor program, and designating the operation of the program from an externally set terminal. CONSTITUTION:At memory exchanging, an all clear set terminal SW is set on, A CPU reads out the monitor program from an ROM when the switch SW is set on, and clears an IC RAM. All 0 data are inputted to a data input register REG2, they are written in all areas of the IC RAM and a parity bit PB is attached. Then propriety of the parity is checked at the bit PB for the data read out in a data output register REG3. Thus, after all the areas are cleared, an application program is written in a load area to complete the operation of the memory exchange. Thus, the all clearing is finished at a simple program.</p> |
