| 摘要 |
PURPOSE:To check an RAM and an ROM memory without interrupting a system by checking the RAM and ROM memories and storing the check result in the free time of program execution. CONSTITUTION:A memory check program is executed in the free time of the program of a computer system. When the RAM is checked, stored information is transferred to a temporary storage means and then an RAM check pattern is written in the RAM and read out; and this read RAM check pattern is compared with the written RAM check pattern to check whether the RAM is normal or not, and the information stored in the temporary storage means is returned to the RAM. When the ROM is checked, the initial value of a check sum value is set and the contents of the ROM are read out successively to calculate check sum values, which are compared with preset check sum values in a normal state, deciding whether the ROM is normal or not. |
