Recent Changes
| A20 Sequence | S | 26 Nov 2025 17:05 | (rev. 3) | JamesHarris |
Made enable sequence clearer by factoring out the Wait step to a footnote. Also added that 0xdf may be a better value that 0x87 to write to the output port.
| Gathering Information | S | 13 Apr 2021 10:42 | (rev. 16) | JamesHarris |
Memory Management - merged sections, added link, updated layout
| Gathering Information | S | 25 Jan 2021 11:12 | (rev. 15) | JamesHarris |
Added HDD link
| Machine Characteristics - A20 Support in the BIOS | S | 25 Feb 2020 14:48 | (rev. 3) | JamesHarris |
Fixed typo
| Machine Characteristics - A20 Controls | S | 08 Aug 2018 16:35 | (rev. 4) | JamesHarris |
| Machine Characteristics - A20 Controls | S | 08 Aug 2018 16:34 | (rev. 3) | JamesHarris |
| KBC | S | 25 Dec 2017 09:37 | (rev. 2) | JamesHarris |
Fixed a page link
| Cmos Reg A | S | 30 Aug 2015 18:12 | (rev. 2) | JamesHarris |
Fixed a link
| Cmos Reg A | S | 30 Aug 2015 18:09 | (rev. 1) | JamesHarris |
Fixed a heading
| KBC Status Register | S | 28 Aug 2015 03:21 | (rev. 1) | JamesHarris |
Corrected an internal link
| KBC Commands | S | 26 Aug 2015 21:43 | (rev. 1) | JamesHarris |
Fixed a link
| The PC A20 Problem | S | 23 Aug 2015 11:10 | (rev. 1) | JamesHarris |
Corrected old Wikispaces link to new one
| Pc Dma Addressing | S | 15 Jun 2015 06:25 | (rev. 1) | JamesHarris |
Removed broken link
| Gathering Information | S | 06 Jun 2015 06:53 | (rev. 14) | Benjamin David Lunt |
| rbil | S | 31 May 2015 07:14 | (rev. 8) | JamesHarris |
Added hints on intwin.hlp setup
| rbil | S | 31 May 2015 06:25 | (rev. 7) | JamesHarris |
Bundled hintsrch.dll with the help file
| rbil | F | 31 May 2015 06:21 | (rev. 6) | JamesHarris |
Uploaded file "intwin.zip".
| rbil | S | 27 May 2015 22:00 | (rev. 5) | JamesHarris |
Added size of intwin.hlp download
| rbil | S | 27 May 2015 21:46 | (rev. 4) | JamesHarris |
Changed text about intwin.hlp
| rbil | S | 27 May 2015 21:43 | (rev. 3) | JamesHarris |