| 摘要 |
PURPOSE:To improve the tracing function, by using the real time to read out both tracing start and end addresses which are set previously and to compare these addresses with the address to which a CPU gives access. CONSTITUTION:The tracing addresses are set to the tracing start and end address memories 6 and 7 respectively from a data bus via analog switches 8 and 9. In the reading mode, the corresponding sectors of the memories 6 and 7 are designated by the high-order bit of the address. Then tracing start and end addresses, i.e., the contents of both memories are compared with the address to which a CPU gives access through comparators 10 and 11 and via the switches 8 and 9. When the coincidence is obtained from the comparison, a flip-flop 12 is set. Then only the working process needed for the program is stored in a tracing memory 1. |
