PROGRAM DEBUG DEVICE

PURPOSE:To detect in a short time the cause of a memory breakdown and a register breakdown, and an abnormal part of a program by adding a monitor data register and a new instruction. CONSTITUTION:In addition to a monitor address register 5 whose address to be monitored is set by an event monitor sta...

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Bibliographic Details
Main Author YU KEIICHI
Format Patent
LanguageEnglish
Published 21.02.1987
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:PURPOSE:To detect in a short time the cause of a memory breakdown and a register breakdown, and an abnormal part of a program by adding a monitor data register and a new instruction. CONSTITUTION:In addition to a monitor address register 5 whose address to be monitored is set by an event monitor start instruction, a monitor register 6 for holding the contents of a main storage device 2 corresponding to a monitor address is provided. In this state, by branching to an even monitor routine at every time point when an execution of each instruction has been executed, the contents of the main storage device 2 corresponding to the address of the register 5 are read out, its contents and the contents of the register 6 are compared, and in case of coincidence, the processing branches to the next instruction executing routine, and in case of dissidence, an instruction store address is recorded, and the processing which branches to the next instruction executing routine is continued until an even monitor stop instruction is received. In this way, the cause of a memory breakdown and an abnormal part can be detected in a short time.
Bibliography:Application Number: JP19850180251