| 摘要 |
<p>In a programmable controller having a central processor unit and a memory, the invention provides the memory in the form of a fast memory (suitably a RAM) and a slow memory (suitably an EAROM). The processor is normally controlled by program information in the slow memory. When it is desired to alter the control program, new program information is loaded into the fast memory. Control is then transferred to the fast memory, the new program information transferred to the slow memory, and control returned to the slow memory.</p> |
