From Wikipedia, the free encyclopedia
Jump to: navigation, search
DOS/V logo (OADG)

DOS/V was a Japanese computing initiative starting in 1990 to allow DOS on IBM PC compatibles with VGA cards to handle double-byte (DBCS) Japanese text via software alone.[1] It was developed by IBM for its PS/55 machines (a localized version of the PS/2).[1] Kanji fonts and other locale information were stored on the hard disk rather than on special chips as in the preceding AX architecture. As with AX, its great value for the Japanese computing industry was in allowing compatibility with foreign software. This had not been possible under NEC's proprietary PC-98 system, which was the market leader before DOS/V emerged. DOS/V stands for "Disk Operating System/VGA" (not "version 5"; DOS/V came out at approximately the same time as DOS 5).

The promotion of DOS/V was done by IBM and its consortium called PC Open Architecture Developers' Group (OADG).[1]


  • $FONT.SYS - Font driver[2][3][4]
  • $DISP.SYS - Display driver[5][3][4]
  • $IAS.SYS - Input assist subsystem (IAS) with front end processor (FEP) support driver[3]
  • $PRN.SYS - Printer driver[3]
  • $PRNUSER.SYS - Printer driver[3]
  • $PRNESCP.SYS - Printer driver for Epson ESC/P J84[3]


  • IBM DOS/V Extension V1.0 (1993-01) includes V-Text support[6]
  • IBM DOS/V Extension V2.0 "5605-PXB"[6]

PC DOS versions of DOS/V (J for Japanese, P for Chinese (PRC), T for Taiwanese, H for Korean):[7]

MS-DOS versions of DOS/V:

DR DOS versions of DOS/V:

See also[edit]


  1. ^ a b Japanese and Korean issues of the DR DOS ANSI.SYS driver contain support for a number of special arguments to switch to Japanese video modes and toggle between Korean and English input modes.
  2. ^ A Japanese version of Novell NetWare Lite named "NetWare Lite 1.1J" existed. Updates were distributed by Novell as DOSV6.EXE, DOSV.EXE, TSBODI.LZH.
  3. ^ A Japanese version of Novell DOS 7 was announced and is referred to in various English documents, but was apparently never released.
  4. ^ A Japanese version of Novell Personal NetWare 1.0 named "Personal NetWare J" existed, f.e. as distributed by CONTEC for PC-98 and DOS/V platforms. Updates were distributed by Novell as P10J0?.EXE (with ? replaced by 1 - 5), PNDOSV2.EXE, PNDOSV1.LZH.


  1. ^ a b c Boyd, John (April 1997). "From Chaos to Competition - Japan's PC industry in transformation". Computing Japan Magazine. Archived from the original on 2017-01-16. Retrieved 2017-01-16. 
  2. ^ "$FONT.SYS". PC Users' Guide Forums (FPCU). Retrieved 2017-01-15. 
  3. ^ a b c d e f Myers, Steven; Smith, Greg (March 1995). "DOS/V: The Soft(ware) Solution to Hard(ware) Problems". Computing Japan Magazine. Archived from the original on 2017-01-15. Retrieved 2017-01-15. 
  4. ^ a b Cha. N. (2012-10-21). "DOS/V - FONTX - Electronics Projects". Archived from the original on 2017-01-15. Retrieved 2017-01-15. 
  5. ^ "$DISP.SYS". PC Users' Guide Forums (FPCU). Retrieved 2017-01-15. 
  6. ^ a b "V-Text-24" (in Japanese). 2011-10-13. Retrieved 2017-01-16. 
  7. ^ a b c d e "SurePOS 100 IBM 4613 Point of Sale Terminal Technical Reference" (PDF). 1.0. IBM Corporation. 2007-12-31 [2001]. 
  8. ^ a b c d e f g h i j k l m "Timeline of DOS/V versions" (in Japanese). 2014-11-28. Retrieved 2017-01-16. 
  9. ^ a b c d e f g h i j k l m n o p q r s t akm (2013) [2007]. "What's DOS/V". Retrieved 2016-01-16. 
  10. ^ IBM Japan (1990-10-11). "PS/55に業界最高速モデル登場" [The industry's fastest model is now added on PS/55]. 情報科学 (in Japanese). 情報科学研究所 (published 1991). 27: 53–61. ISSN 0368-3354. 
  11. ^ "MIXハイライト : ibm.pc 会議 : PC/AT互換パソコンでDOS/Vが動いた" [MIX highlights : ibm.pc forum : I found the DOS/V could run on PC/AT compatibles]. 日経バイト (in Japanese). Nikkei Business Publications: 326–329. January 1991. ISSN 0289-6508. 
  12. ^ a b c d e f "IBM AS/400 Client Access Branches into Two New Families -- AS/400 Client Access Family for Windows and AS/400 Client Access Family Version 4 Release 1 - Software Announcement". IBM. 1997-08-19. Announcement Letter Number: 297-302. Archived from the original on 2017-01-16. Retrieved 2017-01-16. 
  13. ^ Tam, Roy; Elliott, John (2014-01-12). "DR DOS 6.0/V". Retrieved 2017-01-16.  (NB. Has screenshots of a DBCS-enabled version of ViewMAX/2 running on DR DOS 6.0/V and a hex dump of the corresponding DRFONT database SCREENHZ.FNT for its $FONT.SYS.
  14. ^ a b "Minimum Patch List (Japanese)" (in Japanese and English). Novell. 2006-01-19. Archived from the original on 2017-01-16. Retrieved 2017-01-16. 
  15. ^ a b Paul, Matthias (1997-07-30). NWDOS-TIPs — Tips & Tricks rund um Novell DOS 7, mit Blick auf undokumentierte Details, Bugs und Workarounds (e-book). MPDOSTIP (in German) (3, release 157 ed.). Retrieved 2012-01-11.  (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.)

Further reading[edit]

  • Adachi, Tsuyoshi (1994). DOS/V Technical Reference Manual. Softbank Books. 
  • Tsuchiya, Masaru (1994). PC DOS 6/V Handbook. Natsumesha, Inc. 
  • Compaq Seran Kikaku Division (1993). DOS/V Pasokon. Seitousha, Inc.