AMD AMD-K6-2/400 User Guide - Page 61
Control Registers,
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23542A/0-September 2000 Preliminary Information AMD-K6™-2E+ Embedded Processor Data Sheet Control Registers 31 The five control registers contain system control bits and pointers. Figures 21 through 25 show the formats of the control registers. 76543210 M C E P S E D E T S D P V I V M E Reserved Symbol MCE PSE DE TSD PVI VME Description Bit Machine Check Enable 6 Page Size Extensions 4 Debugging Extensions 3 Time Stamp Disable 2 Protected Virtual Interrupts 1 Virtual-8086 Mode Extensions 0 Figure 21. Control Register 4 (CR4) 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Page Directory Base PP CW DT Reserved Symbol Description Bit PCD Page Cache Disable 4 PWT Page Writethrough 3 Figure 22. Control Register 3 (CR3) 31 0 Page Fault Linear Address Figure 23. Control Register 2 (CR2) Chapter 3 Software Environment 39