Job File Table: Difference between revisions

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Revision as of 17:13, 14 April 2019 edit GünniX (talk \| contribs) Extended confirmed users 336,865 edits m References ← Previous edit		Latest revision as of 02:06, 18 February 2025 edit undo Discospinster (talk \| contribs) Administrators 489,923 edits m Reverted edits by Amran_Uddin (talk) (HG) (3.4.13) Tags: Huggle Rollback
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Line 22: \| 4 \| [[LPT1]] \|}<ref>~~hhttps~~{{Cite web\|url=https://en.wikibooks.org/wiki/First_steps_towards_system_programming_under_MS-DOS_7/Appendix#A.01-4_System_File_Table_structure\|title = First steps towards system programming under MS-DOS 7/Appendix - Wikibooks, open books for an open world}}</ref> Handles 0-2 are connected to the console device. During program execution they can get modified (closed, redirected) like any other handle. Because the size of the JFT in the PSP is limited to 20 bytes, originally only 15 files (20- minus the 5 standard devices) could be open at a time. In MS-DOS 2.0, the Extended Job File Table was introduced, which allowed up to 254 files to be opened. As of MS-DOS 3.30, the size of the JFT can be modified with a call to <code>INT 21h, 67h</code>.