Talk:Program Segment Prefix

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hi to all i am in a kind of hurry, my question is that if we want to get the last command entered in dos, what is the possible way, for example if we want to calculate the value of factorial such that if last command on Dos was C:\>factorial 6 then we calculate the factorial of 6 i am unable to find any way to solve this problem

In some versions of DOS, the last command entered can be found by typing the right-arrow key repeatedly, or by typing the up-arrow key. Typing the up-arrow key a second time displays the previous-to-last command, and a third time displays the command previous to that one, etc. 72.73.192.189 (talk) 20:24, 7 September 2010 (UTC)

Merge Job File Table (JFT) article into the PSP article
The Job File Table (JFT) is part of the Program Segment Prefix (PSP) and doesn't really need its own article. The information in the JFT could be added to the PSP article since both articles are already fairly small. Once this is done Job File Table could redirect to the PSP article. Asmpgmr (talk) 18:48, 26 June 2012 (UTC)
 * I agree with you that both articles are rather short at present, however, looking ahead in time a bit I can think of several more pages of useful information to be added to the JFT article and certainly a few dozen pages that could be reasonably added to the PSP article - at present a lot of things are not mentioned at all (or misleading/incorrect) or we are only scratching the surface. The merged JFT stuff could be easily overlooked in an extended PSP article and it would certainly not make it easier to understand the JFT stuff. I think separate articles give us a better chance to explain the concepts and lay out the basic architecture of the operating system. Therefore I would suggest to not merge the articles. --Matthiaspaul (talk) 11:12, 28 June 2012 (UTC)
 * I guess it is a question of how much information should be added to the article and how much should be left for other references. Asmpgmr (talk) 15:53, 28 June 2012 (UTC)
 * I removed the incorrect stuff about retrieving command line parameters from the environment. The only thing appended after the environment variables is a string count (always 1) and the fully qualified program name. In fact this is why in Windows 9x COMMAND.COM the CMDLINE environment variable was added. Asmpgmr (talk) 17:42, 28 June 2012 (UTC)