Jump to content

Expanded memory: Revision history


For any version listed below, click on its date to view it. For more help, see Help:Page history and Help:Edit summary. (cur) = difference from current version, (prev) = difference from preceding version, m = minor edit, → = section edit, ← = automatic edit summary

(newest | oldest) View (newer 50 | ) (20 | 50 | 100 | 250 | 500)

25 May 2025

2 May 2025

20 October 2024

26 September 2024

26 August 2024

6 September 2023

6 August 2023

9 July 2023

31 May 2023

3 May 2023

29 March 2023

24 March 2023

14 March 2023

  • curprev 08:0108:01, 14 March 2023 173.59.42.228 talk 16,191 bytes +57 Background: Correction: The entire 384K above the conventional memory region was never all free. At least 64K was reserved and at least 32K actually used for a video buffer (if a graphics adapter was installed), and the top 64 KB was reserved (and at least 40 KB used) for system ROM including BIOS and BASIC. undo
  • curprev 07:5607:56, 14 March 2023 173.59.42.228 talk 16,134 bytes +59 Background: Correction/clarification. It should be noted well that on IBM PC/XT's, IBM PC AT's, and their clones, a full complement of 640 KB conv. mem. could be achieved only with memory boards plugged into the expansion bus; expanded memory expansion boards are different from conventional memory expansion boards. undo
  • curprev 07:5107:51, 14 March 2023 173.59.42.228 talk 16,075 bytes +45 Background: The segmented memory architecture of the 8086 and 8088 is closely coupled with the 20-bit address bus size, which is why later x86 CPUs could not use their address bus extensions in Real Mode, the mode of the 8086/88. undo

23 January 2023

4 August 2022

15 June 2022

14 May 2022

12 January 2022

23 April 2021

11 November 2020

12 October 2020

5 September 2020

28 August 2020

28 June 2020

27 June 2020

21 May 2020

3 March 2020

9 February 2020

8 February 2020

4 May 2019

6 April 2019

29 October 2018

21 October 2018

(newest | oldest) View (newer 50 | ) (20 | 50 | 100 | 250 | 500)