| 摘要 |
PURPOSE:To improve the tracing speed at the time of trace processing, by previously setting a specific bit of a program status word (PSW) to the on-condition and, at the same time, setting data designating positional information and tracing information. CONSTITUTION:A program area 10, in which a program PG to be traced is placed, is set on a main memory. The program PG to be traced has a trace on instruction TON designating the starting of tracing, usual instruction I which becomes the object of tracing, and trace off instruction TOFF which designates the termination of tracing. A setting section 40 which sets the positional information of a temporarily storing area 20 of trace information and trace information designating data is in, for example, a register in a CPU and the setting of the setting section 40 is performed when the TON is executed. A PSW 50 has a trace designating bit and this bit is set when the TON is executed and reset when the TOFF is executed. |
