发明名称 |
DIAGNOSTIC CIRCUITRY IN A DATA PROCESSOR |
摘要 |
<p>Diagnostic circuitry for use with the processor of a data processing system. The diagnostic circuitry includes a control register execution log for receiving control store addresses from a control register associated with an "EXECUTE+1" stage. A log pointer addresses the log when control store addresses are written into or read from the log. Test registers connected to the log and log pointer provide control store addresses and decrementing log addresses when the contents of the log are examined. One of the test registers is also used to hold a control store address for comparison with control store addresses of executing microinstructions, and when a match occurs, to generate a SYNC signal.</p> |
申请公布号 |
EP0042422(B1) |
申请公布日期 |
1987.07.29 |
申请号 |
EP19810900284 |
申请日期 |
1980.12.18 |
申请人 |
NCR CORPORATION |
发明人 |
ARMSTRONG, ROLFE DOUGLAS;WALSH, DENNIS ALLEN |
分类号 |
G06F11/22;G06F9/38;G06F11/07;G06F11/34;(IPC1-7):G06F9/30;G06F11/00 |
主分类号 |
G06F11/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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