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AMD-K6 Datasheet(PDF) 237 Page - Advanced Micro Devices

Part # AMD-K6
Description  AMD-K6 Processor
PDF  346 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AMD-K6 Datasheet(HTML) 237 Page - Advanced Micro Devices

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Chapter 11
Test and Debug
219
20695H/0—March 1998
AMD-K6® Processor Data Sheet
Preliminary Information
Figure 77. Debug Registers DR3, DR2, DR1, and DR0
DR3–DR0. The processor allows the setting of up to four
breakpoints. DR3–DR0 contain the linear addresses for
breakpoint 3 through breakpoint 0, respectively, and are
compared to the linear addresses of processor cycles to
determine if a breakpoint occurs. Debug register DR7 defines
the specific type of cycle that must occur in order for the
breakpoint to occur.
DR5–DR4. When debugging extensions are disabled (bit 3 of
CR4 is set to 0), the DR5 and DR4 registers are mapped to DR7
and DR6, respectively, in order to be software compatible with
previous generations of x86 processors. When debugging
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8765
432
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Breakpoint 3 32-bit Linear Address
DR3
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8765
432
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Breakpoint 0 32-bit Linear Address
DR0
9
8765
432
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Breakpoint 2 32-bit Linear Address
DR2
9
876
5432
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Breakpoint 1 32-bit Linear Address
DR1



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