Command line length bug \ VOGONS

Command line length bug

Topic actions

First post, by Deltacron

Posted on 2023-07-20, 18:01

Deltacron Offline

Rank Newbie

Rank: Newbie
Posts: 2
Joined: 2023-07-15, 19:15

In DOS, the length of the command line is limited to 127 characters (via the 0Ah int 21 function). This is done due to the fact that 127 bytes are allocated for it in the PSP. In DOSbox, the user can enter commands of unlimited length with unpredictable consequences.

Reply 1 of 1, by ripsaw8080

Posted on 2023-07-20, 20:29

ripsaw8080 Offline

Rank DOSBox Author

Rank: DOSBox Author
Posts: 5064
Joined: 2006-04-25, 23:24

Longer command lines are accepted by the internal shell, which can handle them -- and this is very useful for multi-image mount commands that can be long indeed. However, the command tail that is copied into the PSP is predictably clipped to what can fit when executing DOS programs.

Go to top of page Go to top of page

Back to DOSBox Development