Dynamic Debugging Technique (DDT) is a series of debugger programs originally developed for Digital Equipment Corporation (DEC) hardware, initially known as DEC Debugging Tape because it was distributed on paper tape. The name is a pun on the insecticide DDT. The first version of DDT was developed at MIT for the PDP-1 computer in 1961, but newer versions on newer platforms continued to use the same name. After being ported to other vendor's platforms and changing media, the name was changed to the less DEC-centric version. Early versions of Digital Research's CP/M and CP/M-86 kept the DEC name DDT (and DDT-86 and DDT-68K) for their debugger, however, now meaning Dynamic Debugging Tool.[1][2] The CP/M DDT was later superseded by the Symbolic Instruction Debugger (SID,[3] ZSID, SID86,[4] and GEMSID) in DR DOS and GEM.[5][6]
In addition to its normal function as a debugger, DDT was also used as a top-level command shell for the Massachusetts Institute of Technology (MIT) Incompatible Timesharing System (ITS) operating system; on some more recent ITS systems, "PWORD"—which implements a restricted subset of DDT's functionality—is run first and is overlaid with DDT as soon as the user logs in. DDT could run and debug up to eight processes (called "jobs" on ITS) at a time, such as several sessions of TECO, and DDT could be run recursively - that is, some or all of those jobs could themselves be DDTs (which could then run another eight jobs, and so on). These eight jobs were all given unique names, and the usual name for the original and top-most DDT was "HACTRN" ("hack-tran"). Guy L. Steele wrote a filk poem parody of Edgar Allan Poe's "The Raven," entitled The HACTRN.[citation needed]
DDT (Dynamic Debugging Technique), as implemented on the DECsystem-10 & DECSYSTEM-20[7] allowed references to symbols within the programming being debugged. This feature loaded symbols from the .EXE executable file; a special version named SDDT used symbols from the running monitor and allowed system programmers to "peek" inside.[7]
^Kildall, Gary Arlen (February 1978) [1976]. "A simple technique for static relocation of absolute machine code". Dr. Dobb's Journal of Computer Calisthenics & Orthodontia. People's Computer Company. 3 (2): 10–13 (66–69). ISBN0-8104-5490-4. #22 ark:/13960/t8hf1g21p. Retrieved 2017-08-19. [3]. Originally presented at: Kildall, Gary Arlen (1977) [22–24 November 1976]. "A Simple Technique for Static Relocation of Absolute Machine Code". Written at Naval Postgraduate School, Monterey, California, USA. In Titus, Harold A. (ed.). Conference Record: Tenth Annual Asilomar Conference on Circuits, Systems and Computers: Papers Presented November 22–24, 1976. Asilomar Hotel and Conference Grounds, Pacific Grove, California, USA: Western Periodicals Company. pp. 420–424. ISSN 1058-6393. Retrieved 2021-12-06. (609 pages)
^CP/M Dynamic Debugging Tool (DDT). User's Guide(PDF). Digital Research. 1976. (PDF) from the original on 2007-07-06. Retrieved 2023-02-11.
^SID Users Guide(PDF). Digital Research. 1978. 595-2549. (PDF) from the original on 2019-10-20. Retrieved 2020-02-06. (4+69 pages)
^SID-86 User's Guide for CP/M-86 (2 ed.). Digital Research. August 1982 [March 1982]. SID86UG.WS4. from the original on 2019-10-20. Retrieved 2020-02-06. (NB. A retyped version of the manual by Emmanuel Roche with Q, SR, and Z commands added.)
^Paul, Matthias R. (1997-05-24) [1991]. DRDOSTIP.TXT — Tips und Tricks für DR DOS 3.41 - 5.0. from the original on 2016-11-07. Retrieved 2016-11-07. {{cite book}}: |work= ignored (help)
^Paul, Matthias R. (2002-01-09). "SID86". Newsgroup: comp.os.cpm. Archived from the original on 2018-08-27. Retrieved 2018-04-08. […] Since the DR-DOS 7.03DEBUG is still based on the old SID86.EXE, I suggest to run DEBUG 1.51 and enter the extended help system with ?? from the debug prompt. This will give you eight screens full of syntax and feature help. Some of these features were also supported by older issues. […]
^ abBering, Douglas E. (1975) [1968, 1969, 1970]. "Intro". Reference Manual: DDT (Dynamic debugging technique) and TDT (Tracing debugging technique. National Technical Information Service]. DEC-10-UDDTA-A-D. DDT (Dynamic debugging technique) and TDT (Tracing debugging technique) for PDP-11 systems
External linksedit
DDT Command List for a freeware version written in portable C
-(Artificial Intelligence Memo No. 161A)
ITS: Luser's Guide
The Great Quux Poem Collection -(See especially the notes to the poem The HACTRN)
October 26, 2023
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Dynamic Debugging Technique DDT is a series of debugger programs originally developed for Digital Equipment Corporation DEC hardware initially known as DEC Debugging Tape because it was distributed on paper tape The name is a pun on the insecticide DDT The first version of DDT was developed at MIT for the PDP 1 computer in 1961 but newer versions on newer platforms continued to use the same name After being ported to other vendor s platforms and changing media the name was changed to the less DEC centric version Early versions of Digital Research s CP M and CP M 86 kept the DEC name DDT and DDT 86 and DDT 68K for their debugger however now meaning Dynamic Debugging Tool 1 2 The CP M DDT was later superseded by the Symbolic Instruction Debugger SID 3 ZSID SID86 4 and GEMSID in DR DOS and GEM 5 6 DDT86 CMD in Digital Research CP M 86 for the IBM Personal Computer Version 1 0In addition to its normal function as a debugger DDT was also used as a top level command shell for the Massachusetts Institute of Technology MIT Incompatible Timesharing System ITS operating system on some more recent ITS systems PWORD which implements a restricted subset of DDT s functionality is run first and is overlaid with DDT as soon as the user logs in DDT could run and debug up to eight processes called jobs on ITS at a time such as several sessions of TECO and DDT could be run recursively that is some or all of those jobs could themselves be DDTs which could then run another eight jobs and so on These eight jobs were all given unique names and the usual name for the original and top most DDT was HACTRN hack tran Guy L Steele wrote a filk poem parody of Edgar Allan Poe s The Raven entitled The HACTRN citation needed Contents 1 DEC 10 DEC 20 DDT 2 See also 3 References 4 External linksDEC 10 DEC 20 DDT editDDT Dynamic Debugging Technique as implemented on the DECsystem 10 amp DECSYSTEM 20 7 allowed references to symbols within the programming being debugged This feature loaded symbols from the EXE executable file a special version named SDDT used symbols from the running monitor and allowed system programmers to peek inside 7 See also editOn line Debugging Tool ODT Tracing Debugging Technique TDT DEBUG DOS command Comparison of computer shellsReferences edit Kildall Gary Arlen February 1978 1976 A simple technique for static relocation of absolute machine code Dr Dobb s Journal of Computer Calisthenics amp Orthodontia People s Computer Company 3 2 10 13 66 69 ISBN 0 8104 5490 4 22 ark 13960 t8hf1g21p Retrieved 2017 08 19 1 2 3 Originally presented at Kildall Gary Arlen 1977 22 24 November 1976 A Simple Technique for Static Relocation of Absolute Machine Code Written at Naval Postgraduate School Monterey California USA In Titus Harold A ed Conference Record Tenth Annual Asilomar Conference on Circuits Systems and Computers Papers Presented November 22 24 1976 Asilomar Hotel and Conference Grounds Pacific Grove California USA Western Periodicals Company pp 420 424 ISSN 1058 6393 Retrieved 2021 12 06 609 pages CP M Dynamic Debugging Tool DDT User s Guide PDF Digital Research 1976 Archived PDF from the original on 2007 07 06 Retrieved 2023 02 11 SID Users Guide PDF Digital Research 1978 595 2549 Archived PDF from the original on 2019 10 20 Retrieved 2020 02 06 4 69 pages SID 86 User s Guide for CP M 86 2 ed Digital Research August 1982 March 1982 SID86UG WS4 Archived from the original on 2019 10 20 Retrieved 2020 02 06 4 NB A retyped version of the manual by Emmanuel Roche with Q SR and Z commands added Paul Matthias R 1997 05 24 1991 DRDOSTIP TXT Tips und Tricks fur DR DOS 3 41 5 0 Archived from the original on 2016 11 07 Retrieved 2016 11 07 a href Template Cite book html title Template Cite book cite book a work ignored help Paul Matthias R 2002 01 09 SID86 Newsgroup comp os cpm Archived from the original on 2018 08 27 Retrieved 2018 04 08 Since the DR DOS 7 03 DEBUG is still based on the old SID86 EXE I suggest to run DEBUG 1 51 and enter the extended help system with from the debug prompt This will give you eight screens full of syntax and feature help Some of these features were also supported by older issues a b Bering Douglas E 1975 1968 1969 1970 Intro Reference Manual DDT Dynamic debugging technique and TDT Tracing debugging technique National Technical Information Service DEC 10 UDDTA A D DDT Dynamic debugging technique and TDT Tracing debugging technique for PDP 11 systemsExternal links editDDT Command List for a freeware version written in portable C ITS 1 5 Reference Manual Artificial Intelligence Memo No 161A ITS Luser s Guide The Great Quux Poem Collection See especially the notes to the poem The HACTRN Retrieved from https en wikipedia org w index php title Dynamic debugging technique amp oldid 1163283968 CP M, wikipedia, wiki, book, books, library,
