View source for Talk:DOS executable (.com)

== fixed vs relative addressing? ==

re ''They can only use relative adressing'' - in 8086 mode, a memory address is either
- relative within a segment,
- absolute within a segment 
- absolute including a segment address 

While it is unknown what segment a given COM file will be loaded into, it IS known (as specified) that it will be loaded from offset 0x100 into that segment. So intra-segment absolute addressing is perfectly valid. [[User talk:jonnosan|jonnosan]] 8:26 21 May 2013(UTC)

== compressed executable vs commandline program ==

Thanks for fixing the initial page. My source, a paper about the file utility mentioned  .com files being compressed executables. Guess I should cite more... [[User:Maurice.de.rooij|Maurice.de.rooij]] ([[User talk:Maurice.de.rooij|talk]]) 07:28, 6 December 2012 (UTC)
* [http://scholar.google.nl/scholar?cluster=7943745569952873113 Extensions of the UNIX File Command and Magic File for File Type Identification]
:Ah, yes, that seems a bit wrong (unless they talk about some other, specific COM file). I wanted to add COM some time ago anyway (when I did EXE), but it somehow got lost due to my being busy recently. I just happened to notice it in the "recent changes" and fixed it. On some unrelated note, why can't we delete (or move/rename) any pages? There are a few now that are blanked because they were moved. Is delete/move only for administrators? --[[User:Darkstar|Darkstar]] ([[User talk:Darkstar|talk]]) 17:22, 6 December 2012 (UTC)
::"Move" exists in the pull-down menu to the right of "View history". I think "Delete" is reserved for admins, though. [[User:Dan Tobias|Dan Tobias]] ([[User talk:Dan Tobias|talk]]) 18:16, 6 December 2012 (UTC)
:: There seems not to exist such thing as compressed executable COM file, after an extensive search on the Google. Because the source was a university paper, I wrongly assumed that it didnt need verification. Another lesson learned... [[User:Maurice.de.rooij|Maurice.de.rooij]] ([[User talk:Maurice.de.rooij|talk]]) 18:37, 6 December 2012 (UTC)
::: Ah, indeed, I didn't see the "move" up there. Could have made my editing a bit more transparent. --[[User:Darkstar|Darkstar]] ([[User talk:Darkstar|talk]]) 22:22, 6 December 2012 (UTC)