A20 Line: Revision history

9 June 2024

• curprev 04:2104:21, 9 June 2024‎ Xtex talk contribs‎ m 14,650 bytes +198‎ Bot: Replace deprecated source tag with syntaxhighlight

10 July 2023

• curprev 03:1603:16, 10 July 2023‎ osdev>Khaledhammouda‎ 14,452 bytes +31‎ No edit summary

12 April 2023

• curprev 15:3715:37, 12 April 2023‎ osdev>Tyfoc‎ 14,421 bytes +2,483‎ Added final code example
• curprev 14:5214:52, 12 April 2023‎ osdev>Tyfoc‎ m 11,938 bytes +16‎ Small description fix
• curprev 14:4414:44, 12 April 2023‎ osdev>Tyfoc‎ 11,922 bytes +919‎ Added additional more obvious code to test line A20

3 January 2022

• curprev 16:5816:58, 3 January 2022‎ osdev>Staticsaga‎ m 11,003 bytes +3‎ Some Haswell and above machines don't offer the functionality of masking the A20 gate at all

19 July 2021

• curprev 14:4914:49, 19 July 2021‎ osdev>Atie‎ 11,000 bytes +27‎ Some emulators enable the A20 gate

25 October 2017

• curprev 06:1306:13, 25 October 2017‎ osdev>Thepowersgang‎ m 10,973 bytes 0‎ Fix incorrect fix
• curprev 04:4704:47, 25 October 2017‎ osdev>Slowbyte‎ m 10,973 bytes −6‎ No edit summary

18 June 2017

• curprev 04:1204:12, 18 June 2017‎ osdev>Eladashkcenazi335‎ 10,979 bytes 0‎ →‎Testing The A20 Line From Protected Mode
• curprev 04:1004:10, 18 June 2017‎ osdev>Eladashkcenazi335‎ 10,979 bytes +180‎ →‎Testing The A20 Line From Protected Mode
• curprev 04:0404:04, 18 June 2017‎ osdev>Eladashkcenazi335‎ 10,799 bytes +2‎ →‎Testing The A20 Line In Protected Mode
• curprev 04:0404:04, 18 June 2017‎ osdev>Eladashkcenazi335‎ 10,797 bytes 0‎ →‎Testing The A20 Line In Protected Mode
• curprev 04:0304:03, 18 June 2017‎ osdev>Eladashkcenazi335‎ 10,797 bytes +46‎ →‎Testing The A20 Line In Protected Mode

16 June 2017

• curprev 09:0609:06, 16 June 2017‎ osdev>Eladashkcenazi335‎ 10,751 bytes +126‎ →‎Testing The A20 Line In Protected Mode
• curprev 08:5108:51, 16 June 2017‎ osdev>Eladashkcenazi335‎ 10,625 bytes +2‎ →‎Testing A20 line from Protected Mode
• curprev 07:0207:02, 16 June 2017‎ osdev>Eladashkcenazi335‎ 10,623 bytes +1‎ →‎Testing A20 line from Protected Mode
• curprev 07:0207:02, 16 June 2017‎ osdev>Eladashkcenazi335‎ 10,622 bytes +57‎ →‎Testing A20 line from Protected Mode
• curprev 07:0007:00, 16 June 2017‎ osdev>Eladashkcenazi335‎ 10,565 bytes 0‎ →‎Testing A20 line from Protected Mode
• curprev 06:5906:59, 16 June 2017‎ osdev>Eladashkcenazi335‎ 10,565 bytes +103‎ →‎Testing A20 line from Protected Mode
• curprev 06:5706:57, 16 June 2017‎ osdev>Eladashkcenazi335‎ 10,462 bytes +418‎ →‎Testing the A20 line

14 June 2017

• curprev 18:3718:37, 14 June 2017‎ osdev>Eladashkcenazi335‎ 10,044 bytes −4‎ →‎Access of 0xee
• curprev 17:2417:24, 14 June 2017‎ osdev>Eladashkcenazi335‎ 10,048 bytes +7‎ →‎Access of 0xee
• curprev 17:2217:22, 14 June 2017‎ osdev>Eladashkcenazi335‎ 10,041 bytes +808‎ →‎Enabling

15 February 2017

• curprev 17:3217:32, 15 February 2017‎ osdev>Cheapskate01‎ m 9,233 bytes −1‎ Fixed small spelling error near end of INT 15 section.

23 July 2016

• curprev 11:2611:26, 23 July 2016‎ osdev>New16‎ m 9,234 bytes +2‎ spelling
• curprev 11:2511:25, 23 July 2016‎ osdev>New16‎ 9,232 bytes +546‎ reworked section "INT 15, 2401"

16 January 2016

• curprev 15:0115:01, 16 January 2016‎ osdev>Catnikita255‎ 8,686 bytes +2‎ →‎Keyboard Controller

21 February 2014

• curprev 12:3612:36, 21 February 2014‎ Brendan talk contribs‎ 8,684 bytes +784‎ Added "recommended method"

25 March 2012

• curprev 03:5003:50, 25 March 2012‎ Brendan talk contribs‎ m 7,900 bytes +27‎ Cross-linking

15 January 2012

• curprev 23:5623:56, 15 January 2012‎ osdev>Jimmio92‎ 7,873 bytes +338‎ No edit summary

18 May 2011

• curprev 00:0400:04, 18 May 2011‎ osdev>Primis‎ m 7,535 bytes −5‎ →‎Keyboard Controller: Fixed a Broken Link, Specifically http://www.diakom.ru/el/elfirms/datashts/Smsc/42w11.pdf

5 February 2011

• curprev 12:2512:25, 5 February 2011‎ osdev>Mnemo‎ m 7,540 bytes +16‎ de:A20-Gate

30 January 2010

• curprev 11:1411:14, 30 January 2010‎ osdev>Nedbrek‎ 7,524 bytes +325‎ Added Int 15, function 2401

11 August 2009

• curprev 19:4419:44, 11 August 2009‎ osdev>Yuhong‎ 7,199 bytes 0‎ Swap the order of ES/DS
• curprev 19:4019:40, 11 August 2009‎ osdev>Yuhong‎ 7,199 bytes +24‎ →‎Fast A20 Gate
• curprev 19:3919:39, 11 August 2009‎ osdev>Yuhong‎ 7,175 bytes 0‎ →‎Testing the A20 line: Substitute the 386-specific FS/GS with DS/ES.

18 July 2009

• curprev 00:5200:52, 18 July 2009‎ osdev>Manonthemoon‎ 7,175 bytes −328‎ minor rewrite of intro

10 May 2009

• curprev 01:2701:27, 10 May 2009‎ osdev>Oros‎ m 7,503 bytes +27‎ →‎Fast A20 Gate
• curprev 01:2601:26, 10 May 2009‎ osdev>Oros‎ m 7,476 bytes +32‎ →‎Keyboard Controller
• curprev 01:2601:26, 10 May 2009‎ osdev>Oros‎ m 7,444 bytes +17‎ →‎Testing the A20 line

19 March 2009

• curprev 05:2105:21, 19 March 2009‎ osdev>Thepowersgang‎ 7,427 bytes −1‎ Undo revision 7386 by Thepowersgang (Talk)

18 March 2009

• curprev 11:3411:34, 18 March 2009‎ osdev>Thepowersgang‎ 7,428 bytes +1‎ 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
• curprev 08:5308:53, 18 March 2009‎ osdev>Hyperdrive‎ 7,427 bytes −1‎ Corrected code snippet to test A20 gate state

8 February 2009

• curprev 12:0612:06, 8 February 2009‎ Rook talk contribs‎ 7,428 bytes +85‎ →‎Testing the A20 line
• curprev 12:0012:00, 8 February 2009‎ Rook talk contribs‎ 7,343 bytes +213‎ →‎Testing the A20 line: Maybe the code in this function is a bit excessive, but I wanted it to be self-contained.
• curprev 11:4411:44, 8 February 2009‎ Rook talk contribs‎ 7,130 bytes +44‎ →‎Testing the A20 line
• curprev 11:4111:41, 8 February 2009‎ Rook talk contribs‎ 7,086 bytes +833‎ No edit summary

26 December 2008

• curprev 03:2203:22, 26 December 2008‎ osdev>Yuhong‎ 6,253 bytes +177‎ No edit summary

1 May 2008

• curprev 06:3206:32, 1 May 2008‎ osdev>Randomibis‎ 6,076 bytes 0‎ spelling correction