Page history
9 June 2024
10 July 2023
12 April 2023
osdev>Tyfoc
Added final code example
+2,483
osdev>Tyfoc
Small description fix
m+16
osdev>Tyfoc
Added additional more obvious code to test line A20
+919
3 January 2022
19 July 2021
25 October 2017
18 June 2017
osdev>Eladashkcenazi335
→Testing The A20 Line From Protected Mode
osdev>Eladashkcenazi335
→Testing The A20 Line From Protected Mode
+180
osdev>Eladashkcenazi335
→Testing The A20 Line In Protected Mode
+2
osdev>Eladashkcenazi335
→Testing The A20 Line In Protected Mode
osdev>Eladashkcenazi335
→Testing The A20 Line In Protected Mode
+46
16 June 2017
osdev>Eladashkcenazi335
→Testing The A20 Line In Protected Mode
+126
osdev>Eladashkcenazi335
→Testing A20 line from Protected Mode
+2
osdev>Eladashkcenazi335
→Testing A20 line from Protected Mode
+1
osdev>Eladashkcenazi335
→Testing A20 line from Protected Mode
+57
osdev>Eladashkcenazi335
→Testing A20 line from Protected Mode
osdev>Eladashkcenazi335
→Testing A20 line from Protected Mode
+103
osdev>Eladashkcenazi335
→Testing the A20 line
+418
14 June 2017
osdev>Eladashkcenazi335
→Access of 0xee
−4
osdev>Eladashkcenazi335
→Access of 0xee
+7
osdev>Eladashkcenazi335
→Enabling
+808
15 February 2017
23 July 2016
16 January 2016
21 February 2014
25 March 2012
15 January 2012
18 May 2011
5 February 2011
30 January 2010
11 August 2009
osdev>Yuhong
Swap the order of ES/DS
osdev>Yuhong
→Fast A20 Gate
+24
osdev>Yuhong
→Testing the A20 line: Substitute the 386-specific FS/GS with DS/ES.
18 July 2009
10 May 2009
osdev>Oros
→Fast A20 Gate
m+27
osdev>Oros
→Keyboard Controller
m+32
osdev>Oros
→Testing the A20 line
m+17
19 March 2009
18 March 2009
osdev>Thepowersgang
Undo revision 7385 by Hyperdrive (Talk). It is smaller to use xor to zero a register, and when you know that ah is 0, you can just set al
+1
osdev>Hyperdrive
Corrected code snippet to test A20 gate state
−1
8 February 2009
Rook
→Testing the A20 line
+85
Rook
→Testing the A20 line: Maybe the code in this function is a bit excessive, but I wanted it to be self-contained.
+213
Rook
→Testing the A20 line
+44
Rook
no edit summary
+833