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AMD-K6-2E/233AMZ датащи(PDF) 63 Page - Advanced Micro Devices |
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AMD-K6-2E/233AMZ датащи(HTML) 63 Page - Advanced Micro Devices |
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63 / 332 page ![]() Chapter 3 Software Environment 45 22529B/0—January 2000 AMD-K6™-2E Processor Data Sheet Preliminary Information UC/WC Cacheability Control Register (UWCCR) The AMD-K6-2E processor provides two variable-range Memory Type Range Registers (MTRRs)—MTRR0 and MTRR1—that each specify a range of memory. Each range can be defined as uncacheable (UC) or write-combining (WC) memory. Figure 37 shows the format of the UWCCR register. For more detailed information about the MTRR0, MTRR1, and UWCCR registers, see “Memory Type Range Registers” on page 207. . Figure 37. UC/WC Cacheability Control Register (UWCCR) Processor State Observability Register (PSOR) The AMD-K6-2E processor provides the processor state observability register (PSOR) (see Figure 38). Figure 38. Processor State Observability Register (PSOR) 16 0 63 Physical Address Mask 0 17 31 Physical Base Address 0 1 2 Physical Address Mask 1 Physical Base Address 1 32 33 34 48 49 U C 0 W C 0 U C 1 W C 1 MTRR1 MTRR0 Symbol Description Bits UC0 Uncacheable Memory Type 0 WC0 Write-Combining Memory Type 1 Symbol Description Bits UC1 Uncacheable Memory Type 32 WC1 Write-Combining Memory Type 33 20 63 BF Symbol Description Bit NOL2 No L2 Functionality 8 STEP Processor Stepping 7-4 BF Bus Frequency Divisor 2-0 3 4 STEP 7 8 9 N O L 2 Reserved |
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