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ViewMAX

ViewMAX is a CUA-compliant file manager supplied with DR DOS versions 5.0 and 6.0. It is based on a cut-down runtime version of Digital Research's GEM/3 graphical user interface modified to run only a single statically built application, the ViewMAX desktop.[1][2] Support for some unneeded functions has been removed whilst some new functions were added at the same time.[2] Nevertheless, the systems remained close enough for ViewMAX to recognize GEM desktop accessories (.ACC executables) automatically[3][4] and to allow some native GEM applications (.APP executables) to be run inside the ViewMAX environment (without having to install and launch GEM first).[3][4] Many display drivers for GEM 3.xx could be used by ViewMAX as well, enabling ViewMAX to be used with non-standard display adapters and higher resolutions than possible using the default set of ViewMAX drivers.[2][3][4] Also, Digital Research's SID86, the symbolic instruction debugger that shipped with DR DOS 3.xx and provided dedicated functions to debug GEM applications (see ?Y GEM-specific help under SID86 or GEMSID), could be used for ViewMAX as well.[5][6]

ViewMAX
Screenshot of ViewMAX 2 file manager with user-defined colors
Developer(s)Digital Research, Novell, Caldera Thin Clients
Initial release1990; 33 years ago (1990)
Stable release
ViewMAX 3 beta / April 1999; 24 years ago (1999-04)
Operating systemDR-DOS
TypeWindowing system
LicenseGNU General Public License

Versions edit

Originally named Navigator in beta versions,[7] ViewMAX 1.00[8] was distributed with DR DOS 5.0 in 1990 to provide an equivalent to DOSSHELL in MS-DOS/PC DOS 4.0. It had a very similar appearance to Digital Research's previous GEM desktops – two fixed-size windows. Each window would either contain icons representing drives, directories and files, or a representation of the directory hierarchy.[8] If supported by the underlying operating system (such as DR DOS), file and directory passwords and access permissions were supported. Network drives (including CD-ROM drives) were distinguished through their own icon, different from those of local drives.[8]

In 1991, ViewMAX 2 was distributed with DR DOS 6.0. Various graphical improvements were made in this release, including controls with a 3D appearance and user-selectable colour schemes.[9] The directory tree (if enabled) was now shown beside the list of icons, rather than instead of it.[9] Various settings could be stored in a configuration files named %DRDOSCFG%\VIEWMAX.INI.[10][3][4][11][9] For more flexible character set support ViewMAX 2 loaded display fonts from a standard DOS .CPI file[12][13][14][15][16][17] depending on the current code page rather than using a GEM specific character set, a feature also incorporated into FreeGEM since 2005.[18] The DOS/V-compatible Japanese version of ViewMAX, as distributed with DR DOS 6.0/V in 1992, supported DBCS characters loaded by $FONT.SYS from SCREENHZ.FNT.[19] Support was added for the DR DOS task switcher TaskMAX; if this was present, applications would be launched as separate tasks, and ViewMAX could switch between them.[10][20][9] As TASKMGR in later operating systems such as Novell DOS 7, OpenDOS 7.01, DR-DOS 7.02 and higher continued to emulate most of the task switcher API as well,[4][11][21] ViewMAX 2 could be used to switch and control multiple concurrently running full-screen DOS tasks under the DR-DOS preemptively multitasking kernel (EMM386 /MULTI + TASKMGR) as well.[4][11][21]

ViewMAX 3 was intended to be the graphical file manager for Novell's next version of DR DOS. ViewMAX 3 included support for colour icons, movable and resizable windows, program groups, and background images.[22] If the underlying DR-DOS had the optional multi-user security module loaded, ViewMAX would also provide support for the extended world/group/owner access permission system. Although ViewMAX 3 was part of the DR DOS "Panther" Beta 1 distribution in October 1992,[11] it was never completed and apparently abandoned in favour to Apple's and Novell's "Star Trek" team project in 1992/1993, which remained unreleased as well. So, Novell DOS 7, as "DR DOS 7.0" was called in 1994, came without any graphical file manager at all. When Caldera bought the remaining Digital Research assets from Novell on 23 July 1996,[23] initial plans were to revive GEM and ViewMAX technologies for a low-footprint user interface for OpenDOS in mobile applications[24][25] as Caldera View, but these plans were abandoned by Caldera UK in favour of DR-WebSpyder and GROW. After closing the DR-DOS development center Caldera UK in early 1999, the remaining source code of the ViewMAX 3 beta version was published in April 1999 by the US parent company Caldera Thin Clients under the GPL[25] following continued community request to release the sources, shortly before the company changed its name to Lineo and switched to Linux-based technologies three months later.[26] Various ViewMAX features not previously found in GEM have been incorporated into FreeGEM since then.[27][18]

See also edit

References edit

  1. ^ Elliott, John C. (1999-06-10). "Versions of GEM". Seasip.info. from the original on 2016-11-07. Retrieved 2016-11-07.
  2. ^ a b c Elliott, John C. (1999-05-09). "A comparison between GEM and ViewMAX". Seasip.info. from the original on 2016-11-07. Retrieved 2016-11-07.
  3. ^ a b c d Paul, Matthias R. (1997-04-13) [1993]. DRDOS6UN.TXT — Zusammenfassung der dokumentierten und undokumentierten Fähigkeiten von DR DOS 6.0 (in German) (60 ed.). from the original on 2016-11-07. Retrieved 2016-11-07. {{cite book}}: |work= ignored (help)
  4. ^ a b c d e f Paul, Matthias R. (1997-06-07) [1994]. NWDOS7UN.TXT — Zusammenfassung der dokumentierten und undokumentierten Fähigkeiten von Novell DOS 7 (in German) (85 ed.). from the original on 2016-11-07. Retrieved 2016-11-07. {{cite book}}: |work= ignored (help)
  5. ^ Paul, Matthias R. (1997-05-24) [1991]. DRDOSTIP.TXT — Tips und Tricks für DR DOS 3.41 - 5.0 (in German) (47 ed.). from the original on 2016-11-07. Retrieved 2016-11-07. {{cite book}}: |work= ignored (help)
  6. ^ Elliott, John C. (2002-01-08). "SID86". Newsgroup: comp.os.cpm. Archived from the original on 2018-08-27. Retrieved 2018-04-08. […] GEMSID has some additional features for GEM support. In particular, it supports swapping between the GEM graphics screen and the text screen (type ?Y for details). [...]
  7. ^ Microsoft. "DR DOS 5.0 Competitive Analysis" (PDF) (court document). 5114_A Comes v. Microsoft. (PDF) from the original on 2017-01-18. Retrieved 2017-01-18.
  8. ^ a b c Elliott, John C. (2013). "ViewMAX/1 screenshots". Seasip.info. Archived from the original on 2013-01-11. Retrieved 2018-09-10.
  9. ^ a b c d Elliott, John C. (2013). "ViewMAX/2 screenshots". Seasip.info. Archived from the original on 2018-09-11. Retrieved 2018-09-10.
  10. ^ a b R., R. (1992-01-06). "Document 1209 - ViewMAX". Digital Research / Novell. FYI-M-1209. from the original on 2018-04-03. Retrieved 2018-04-03. (NB. 1209.TXT is also part of DRTIPS.ZIP)
  11. ^ a b c d Paul, Matthias R. (1997-07-30) [1994]. NWDOS-TIPs — Tips & Tricks rund um Novell DOS 7, mit Blick auf undokumentierte Details, Bugs und Workarounds. Release 157 (in German) (3 ed.). from the original on 2016-11-04. Retrieved 2014-08-06. {{cite book}}: |work= ignored (help) (NB. NWDOSTIP.TXT is a comprehensive work on Novell DOS 7 and OpenDOS 7.01, including the description of many undocumented features and internals. It is part of the author's yet larger MPDOSTIP.ZIP collection maintained up to 2001 and distributed on many sites at the time. The provided link points to a HTML-converted older version of the NWDOSTIP.TXT file.)
  12. ^ Paul, Matthias R. (2001-06-10) [1995]. (CPI.LST file) (1.30 ed.). Archived from the original on 2016-04-20. Retrieved 2016-08-20.
  13. ^ Elliott, John C. (2006-10-14). "CPI file format". Seasip.info. from the original on 2016-09-22. Retrieved 2016-09-22.
  14. ^ Elliott, John C. (2006-09-03). "Codepage-related software". Seasip.info. from the original on 2016-11-08. Retrieved 2016-11-09.
  15. ^ Brouwer, Andries Evert (2001-02-10). "CPI fonts". 0.2. from the original on 2016-09-22. Retrieved 2016-09-22.
  16. ^ Haralambous, Yannis (September 2007). Fonts & Encodings. Translated by Horne, P. Scott (1 ed.). Sebastopol, California, USA: O'Reilly Media, Inc. pp. 601–602, 611. ISBN 978-0-596-10242-5.
  17. ^ MS-DOS Programmer's Reference. Microsoft Press. 1991. ISBN 1-55615-329-5.
  18. ^ a b Elliott, John C. (March 2006). "FreeGEM (2005-)". Seasip.info. Archived from the original on 2018-09-11. Retrieved 2018-09-10.
  19. ^ Tam, Roy; Elliott, John C. (2014-01-12). "DR DOS 6.0/V". from the original on 2018-09-03. Retrieved 2017-01-16. [...] outline of the support in the video driver (SDJVG9.VGA) [...] At startup, it calls INT 15h/AX=5000h to get the address of the DOS/V 'read font' function. If [...] present, it sets a [...] DBCS [...] flag on the system font. [...] it uses INT 21h/AX=6507h to get the DBCS lead byte table. When a string is passed to [...] text output functions, if a DBCS font is in use and the DBCS lead byte table is loaded, the code checks for DBCS lead/trail bytes in the string passed to it, and combines each pair into a 16-bit character ID. When drawing a character, it checks to see if the character ID is above 256. If so, it calls the DOS/V 'read font' function to get that character's bitmap, and instructs the drawing code to draw 16 pixels from offset 0 of that bitmap, rather than 8 pixels from the system font bitmap at a given offset. There are similar checks in the optimised monospaced text drawing code, allowing characters to be 8 or 16 pixels wide. (NB. Has screenshots of a DBCS-enabled version of ViewMAX running on DR DOS 6.0/V and a hex dump of the corresponding DRFONT database SCREENHZ.FNT for its $FONT.SYS.
  20. ^ Caldera, Inc. (August 1997). . UK. Caldera Part No. 200-DODG-004. Archived from the original on 2016-12-29. Retrieved 2013-03-21.{{cite book}}: CS1 maint: location missing publisher (link)
  21. ^ a b Paul, Matthias R. (2001-12-16). "No lumps of coal". fd-dev. from the original on 2016-11-07. Retrieved 2016-11-07.
  22. ^ Elliott, John C. (2013). "ViewMAX/3 screenshots". Seasip.info. Archived from the original on 2013-09-04. Retrieved 2018-09-10.
  23. ^ Leon, Mark (1996-07-29). "Caldera reopens 'settled' suit, buys DR DOS — Antitrust suit against Microsoft". InfoWorld. News. Vol. 18, no. 31. InfoWorld Publishing Co. p. 3. ISSN 0199-6649. from the original on 2020-02-08. Retrieved 2020-02-08. [1]; Leon, Mark (1996-07-29). . Computerworld New Zealand. IDG Communications. ISSN 0113-1494. CMPWNZ. Archived from the original on 2018-08-23. Retrieved 2018-02-13.
  24. ^ Morris, Joseph P., ed. (1997-05-23) [1997-05-19]. "Caldera Announces OEM Availability of "Web-TV"-like Functionality Using OpenDOS - Caldera WebSpyder Adds Customizable Inter/Intranet Functionality to OEM Solutions". Provo, UT, USA: Caldera, Inc. from the original on 2018-08-26. Retrieved 2018-08-26 – via www.delorie.com/opendos.
  25. ^ a b Jemmett, Ben A. L. (April 1999). "Caldera releases GEM under the GPL". Deltasoft – GEM News. from the original on 2016-11-07. Retrieved 2016-11-07. Caldera Thin Clients, Inc. released the source code for GEM and ViewMAX under the GNU Public License in mid April, following years of speculation over GEM's future. Caldera bought the GEM sources from Novell along with the DR-DOS in 1996, at the time noting that they may develop GEM into a platform for mobile computers and thin clients. However, these plans were dropped, and GEM was instead released into the open-source community.
  26. ^ Caldera, Inc. (1999-07-20). "Embedded Linux moved to top priority at Lineo, Inc. formerly known as Caldera Thin Clients, Inc." (Press release). Lindon, UT, USA. from the original on 2017-06-25. Retrieved 2017-06-24.
  27. ^ Elliott, John C. (March 2006). "FreeGEM (1999-2004)". Seasip.info. Archived from the original on 2013-09-04. Retrieved 2018-09-10.

Further reading edit

External links edit

  • Ben A. L. Jemmett's GEM site Deltasoft
  • John C. Elliott's GEM site Seasip
  • GEMWorld: GEM - The Project (1999 mirror)

viewmax, compliant, file, manager, supplied, with, versions, based, down, runtime, version, digital, research, graphical, user, interface, modified, only, single, statically, built, application, desktop, support, some, unneeded, functions, been, removed, whils. ViewMAX is a CUA compliant file manager supplied with DR DOS versions 5 0 and 6 0 It is based on a cut down runtime version of Digital Research s GEM 3 graphical user interface modified to run only a single statically built application the ViewMAX desktop 1 2 Support for some unneeded functions has been removed whilst some new functions were added at the same time 2 Nevertheless the systems remained close enough for ViewMAX to recognize GEM desktop accessories ACC executables automatically 3 4 and to allow some native GEM applications APP executables to be run inside the ViewMAX environment without having to install and launch GEM first 3 4 Many display drivers for GEM 3 xx could be used by ViewMAX as well enabling ViewMAX to be used with non standard display adapters and higher resolutions than possible using the default set of ViewMAX drivers 2 3 4 Also Digital Research s SID86 the symbolic instruction debugger that shipped with DR DOS 3 xx and provided dedicated functions to debug GEM applications see Y GEM specific help under SID86 or GEMSID could be used for ViewMAX as well 5 6 ViewMAXScreenshot of ViewMAX 2 file manager with user defined colorsDeveloper s Digital Research Novell Caldera Thin ClientsInitial release1990 33 years ago 1990 Stable releaseViewMAX 3 beta April 1999 24 years ago 1999 04 Operating systemDR DOSTypeWindowing systemLicenseGNU General Public License Contents 1 Versions 2 See also 3 References 4 Further reading 5 External linksVersions editOriginally named Navigator in beta versions 7 ViewMAX 1 00 8 was distributed with DR DOS 5 0 in 1990 to provide an equivalent to DOSSHELL in MS DOS PC DOS 4 0 It had a very similar appearance to Digital Research s previous GEM desktops two fixed size windows Each window would either contain icons representing drives directories and files or a representation of the directory hierarchy 8 If supported by the underlying operating system such as DR DOS file and directory passwords and access permissions were supported Network drives including CD ROM drives were distinguished through their own icon different from those of local drives 8 In 1991 ViewMAX 2 was distributed with DR DOS 6 0 Various graphical improvements were made in this release including controls with a 3D appearance and user selectable colour schemes 9 The directory tree if enabled was now shown beside the list of icons rather than instead of it 9 Various settings could be stored in a configuration files named DRDOSCFG VIEWMAX INI 10 3 4 11 9 For more flexible character set support ViewMAX 2 loaded display fonts from a standard DOS CPI file 12 13 14 15 16 17 depending on the current code page rather than using a GEM specific character set a feature also incorporated into FreeGEM since 2005 18 The DOS V compatible Japanese version of ViewMAX as distributed with DR DOS 6 0 V in 1992 supported DBCS characters loaded by FONT SYS from SCREENHZ FNT 19 Support was added for the DR DOS task switcher TaskMAX if this was present applications would be launched as separate tasks and ViewMAX could switch between them 10 20 9 As TASKMGR in later operating systems such as Novell DOS 7 OpenDOS 7 01 DR DOS 7 02 and higher continued to emulate most of the task switcher API as well 4 11 21 ViewMAX 2 could be used to switch and control multiple concurrently running full screen DOS tasks under the DR DOS preemptively multitasking kernel EMM386 MULTI TASKMGR as well 4 11 21 ViewMAX 3 was intended to be the graphical file manager for Novell s next version of DR DOS ViewMAX 3 included support for colour icons movable and resizable windows program groups and background images 22 If the underlying DR DOS had the optional multi user security module loaded ViewMAX would also provide support for the extended world group owner access permission system Although ViewMAX 3 was part of the DR DOS Panther Beta 1 distribution in October 1992 11 it was never completed and apparently abandoned in favour to Apple s and Novell s Star Trek team project in 1992 1993 which remained unreleased as well So Novell DOS 7 as DR DOS 7 0 was called in 1994 came without any graphical file manager at all When Caldera bought the remaining Digital Research assets from Novell on 23 July 1996 23 initial plans were to revive GEM and ViewMAX technologies for a low footprint user interface for OpenDOS in mobile applications 24 25 as Caldera View but these plans were abandoned by Caldera UK in favour of DR WebSpyder and GROW After closing the DR DOS development center Caldera UK in early 1999 the remaining source code of the ViewMAX 3 beta version was published in April 1999 by the US parent company Caldera Thin Clients under the GPL 25 following continued community request to release the sources shortly before the company changed its name to Lineo and switched to Linux based technologies three months later 26 Various ViewMAX features not previously found in GEM have been incorporated into FreeGEM since then 27 18 See also editGEM DOSSHELL Comparison of file managers COMMAND COMReferences edit Elliott John C 1999 06 10 Versions of GEM Seasip info Archived from the original on 2016 11 07 Retrieved 2016 11 07 a b c Elliott John C 1999 05 09 A comparison between GEM and ViewMAX Seasip info Archived from the original on 2016 11 07 Retrieved 2016 11 07 a b c d Paul Matthias R 1997 04 13 1993 DRDOS6UN TXT Zusammenfassung der dokumentierten und undokumentierten Fahigkeiten von DR DOS 6 0 in German 60 ed 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 a b c d e f Paul Matthias R 1997 06 07 1994 NWDOS7UN TXT Zusammenfassung der dokumentierten und undokumentierten Fahigkeiten von Novell DOS 7 in German 85 ed 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 1997 05 24 1991 DRDOSTIP TXT Tips und Tricks fur DR DOS 3 41 5 0 in German 47 ed 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 Elliott John C 2002 01 08 SID86 Newsgroup comp os cpm Archived from the original on 2018 08 27 Retrieved 2018 04 08 GEMSID has some additional features for GEM support In particular it supports swapping between the GEM graphics screen and the text screen type Y for details Microsoft DR DOS 5 0 Competitive Analysis PDF court document 5114 A Comes v Microsoft Archived PDF from the original on 2017 01 18 Retrieved 2017 01 18 a b c Elliott John C 2013 ViewMAX 1 screenshots Seasip info Archived from the original on 2013 01 11 Retrieved 2018 09 10 a b c d Elliott John C 2013 ViewMAX 2 screenshots Seasip info Archived from the original on 2018 09 11 Retrieved 2018 09 10 a b R R 1992 01 06 Document 1209 ViewMAX Digital Research Novell FYI M 1209 Archived from the original on 2018 04 03 Retrieved 2018 04 03 NB 1209 TXT is also part of DRTIPS ZIP a b c d Paul Matthias R 1997 07 30 1994 NWDOS TIPs Tips amp Tricks rund um Novell DOS 7 mit Blick auf undokumentierte Details Bugs und Workarounds Release 157 in German 3 ed Archived from the original on 2016 11 04 Retrieved 2014 08 06 a href Template Cite book html title Template Cite book cite book a work ignored help NB NWDOSTIP TXT is a comprehensive work on Novell DOS 7 and OpenDOS 7 01 including the description of many undocumented features and internals It is part of the author s yet larger MPDOSTIP ZIP collection maintained up to 2001 and distributed on many sites at the time The provided link points to a HTML converted older version of the NWDOSTIP TXT file Paul Matthias R 2001 06 10 1995 Format description of DOS OS 2 and Windows NT CPI and Linux CP files CPI LST file 1 30 ed Archived from the original on 2016 04 20 Retrieved 2016 08 20 Elliott John C 2006 10 14 CPI file format Seasip info Archived from the original on 2016 09 22 Retrieved 2016 09 22 Elliott John C 2006 09 03 Codepage related software Seasip info Archived from the original on 2016 11 08 Retrieved 2016 11 09 Brouwer Andries Evert 2001 02 10 CPI fonts 0 2 Archived from the original on 2016 09 22 Retrieved 2016 09 22 Haralambous Yannis September 2007 Fonts amp Encodings Translated by Horne P Scott 1 ed Sebastopol California USA O Reilly Media Inc pp 601 602 611 ISBN 978 0 596 10242 5 MS DOS Programmer s Reference Microsoft Press 1991 ISBN 1 55615 329 5 a b Elliott John C March 2006 FreeGEM 2005 Seasip info Archived from the original on 2018 09 11 Retrieved 2018 09 10 Tam Roy Elliott John C 2014 01 12 DR DOS 6 0 V Archived from the original on 2018 09 03 Retrieved 2017 01 16 outline of the support in the video driver SDJVG9 VGA At startup it calls INT 15h AX 5000h to get the address of the DOS V read font function If present it sets a DBCS flag on the system font it uses INT 21h AX 6507h to get the DBCS lead byte table When a string is passed to text output functions if a DBCS font is in use and the DBCS lead byte table is loaded the code checks for DBCS lead trail bytes in the string passed to it and combines each pair into a 16 bit character ID When drawing a character it checks to see if the character ID is above 256 If so it calls the DOS V read font function to get that character s bitmap and instructs the drawing code to draw 16 pixels from offset 0 of that bitmap rather than 8 pixels from the system font bitmap at a given offset There are similar checks in the optimised monospaced text drawing code allowing characters to be 8 or 16 pixels wide NB Has screenshots of a DBCS enabled version of ViewMAX running on DR DOS 6 0 V and a hex dump of the corresponding DRFONT database SCREENHZ FNT for its FONT SYS Caldera Inc August 1997 OpenDOS Developer s Reference Series Multitasking API Programmer s Guide UK Caldera Part No 200 DODG 004 Archived from the original on 2016 12 29 Retrieved 2013 03 21 a href Template Cite book html title Template Cite book cite book a CS1 maint location missing publisher link a b Paul Matthias R 2001 12 16 No lumps of coal fd dev Archived from the original on 2016 11 07 Retrieved 2016 11 07 Elliott John C 2013 ViewMAX 3 screenshots Seasip info Archived from the original on 2013 09 04 Retrieved 2018 09 10 Leon Mark 1996 07 29 Caldera reopens settled suit buys DR DOS Antitrust suit against Microsoft InfoWorld News Vol 18 no 31 InfoWorld Publishing Co p 3 ISSN 0199 6649 Archived from the original on 2020 02 08 Retrieved 2020 02 08 1 Leon Mark 1996 07 29 Caldera reopens settled suit buys DR DOS Microsoft s response lawsuit is ironic and sad Computerworld New Zealand IDG Communications ISSN 0113 1494 CMPWNZ Archived from the original on 2018 08 23 Retrieved 2018 02 13 Morris Joseph P ed 1997 05 23 1997 05 19 Caldera Announces OEM Availability of Web TV like Functionality Using OpenDOS Caldera WebSpyder Adds Customizable Inter Intranet Functionality to OEM Solutions Provo UT USA Caldera Inc Archived from the original on 2018 08 26 Retrieved 2018 08 26 via www delorie com opendos a b Jemmett Ben A L April 1999 Caldera releases GEM under the GPL Deltasoft GEM News Archived from the original on 2016 11 07 Retrieved 2016 11 07 Caldera Thin Clients Inc released the source code for GEM and ViewMAX under the GNU Public License in mid April following years of speculation over GEM s future Caldera bought the GEM sources from Novell along with the DR DOS in 1996 at the time noting that they may develop GEM into a platform for mobile computers and thin clients However these plans were dropped and GEM was instead released into the open source community Caldera Inc 1999 07 20 Embedded Linux moved to top priority at Lineo Inc formerly known as Caldera Thin Clients Inc Press release Lindon UT USA Archived from the original on 2017 06 25 Retrieved 2017 06 24 Elliott John C March 2006 FreeGEM 1999 2004 Seasip info Archived from the original on 2013 09 04 Retrieved 2018 09 10 Further reading editDigital Research Inc May 1990 ViewMAX User Guide 1st ed Digital Research Inc Part Number 1174 2004 002 88 pages Digital Research Inc August 1991 ViewMAX User Guide 2nd ed Digital Research Inc Part Number 1192 2054 002 106 pages External links editBen A L Jemmett s GEM site Deltasoft John C Elliott s GEM site Seasip GEMWorld GEM The Project 1999 mirror Retrieved from https en wikipedia org w index php title ViewMAX amp oldid 1187381156 2, wikipedia, wiki, book, books, library,

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