| 摘要 |
PURPOSE:To end a memory check in the minimum necessary time usually and, when necessary, to enable memory-checking also a region other than a diagnostic region by selecting the diagnostic region through a memory check mains for diagnosing a memory. CONSTITUTION:CPU1 serving both as a memory check means and a selecting means inputs a code given from an external apparatus 2 while driving a printer 3 on the basis of the input code to practice a printing motion for printing marks indicated by the input code. In short, when a power supply is closed in a state where the operation of a switch 10 is released, the CPU1 limits a diagnostic region to a program memory 4 and first and second RAMs 6, 7, while expanding the region to ANKCGS and first and second Chinese character CGs 8, 9, when the power supply is closed in a state where the switch 10 is operated, so that the diagnostic region of a memory check is variable. |
