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Protected mode: Revision history

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13 May 2025

  • curprev 09:1109:11, 13 May 2025 100.34.18.149 talk 49,349 bytes +49,349 →Entering and exiting protected mode: Refined and clarified the paragraph about entering protected mode, particularly clarifying the role and effect of the A20 gate. (Editors should note that disabling A20 does not disable access to all memory above the first megabyte; it only disables access to odd megabytes, i.e. addresses [100000h,1FFFFFh], [300000h,3FFFFFh], [500000h,5FFFFFh], etc.)
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