| 摘要 |
A data processing system 2 is provided with breakpoint circuitry 28 having breakpoint registers 30 which can specify a variety of different types of breakpoint conditions. These breakpoint conditions include register access breakpoints which are triggered when an access is made to either a general purpose register 8 or a configuration register 22, 24 . The breakpoints can also include input/output port access breakpoints which are triggered when an access is made to a predetermined one of a plurality of input/output ports 26 by an appropriate program instruction or in another way.
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