https://gunkies.org/index.php?action=history&feed=atom&title=Talk%3AReal_mode 2026-04-06T14:52:34Z Revision history for this page on the wiki MediaWiki 1.30.1 https://gunkies.org/w/index.php?title=Talk:Real_mode&diff=23040&oldid=prev 2021-03-02T15:51:09Z

<p>Intel-specific term</p> <p><b>New page</b></p><div>==Intel-specific==<br /> <br /> The term 'real mode' is Intel-specific. Pretty much '''all''' machines with [[memory management]] (including the [[PDP-10]], [[PDP-11]] and [[VAX]]) start up with a straight mapping from the CPU's [[address space]] to physical [[main memory]]. The OS on these machines sets things (e.g. mapping tables) up, then turns on memory management; all further memory references go through the memory management. That un-mapped mode is never used again, though, and the term 'real mode' is not used to describe that initial operating mode.<br /> <br /> The thing that's definitely ''specific'' to Intel's 'real mode' is that it's used, post-bootstrap, to support code written for older CPU models (which all have memory management, though; the 8086 code generates mostly only 16-bit addresses, which the hardware runs though the [[segment]]ation hardware to produce physical memory addresses). It's not just a 'bootstrap' mode, it's mostly a ''backward compatability'' mode. [[User:Jnc|Jnc]] ([[User talk:Jnc|talk]]) 16:50, 2 March 2021 (CET)</div>

Jnc