Editing DOS/V (section)

=={{anchor|J-DOS|V-Text|Hi-Text}}Versions==
[[File:IBM DOS K3.31 boot-up.png|thumb|IBM Japanese DOS K3.3]]
In 1988, IBM Japan released a new model of the PS/55 which was based on the PS/2 with Japanese language support. It is equipped with a proprietary video card, the Display Adapter, which has a high resolution [[text mode]] and a Japanese character set stored in a [[Read-only memory|ROM]] on the card. It supports Japanese DOS K3.3, PC DOS 3.3 (English) and [[OS/2]].<ref name="ASCII_1988"/>

IBM DOS J4.0 was released in 1989.<ref name="ASCII_1989"/> It combines Japanese DOS and PC DOS, which runs Japanese DOS as the Japanese mode (PS/55 mode) and PC DOS as the English mode (PS/2 mode). Although it had two separated modes that needed a reboot to switch between them, IBM Japan called it ''bilingual''. This version requires the PS/55 display adapter.

[[File:Screen tearing on DOSV.png|thumb|Screen tearing with [[Paradise Systems|Paradise]] [[Super VGA|SVGA]]]]
The first version of DOS/V, IBM DOS J4.0/V (J4.05/V), was released in the end of 1990. The word 'DOS/V' was quickly known to Japanese computer industry, but the DOS/V itself didn't spread quickly. As of 1991, some small companies sold American or Taiwanese computers in Japan, but DOS J4.0/V caused some issues on PC compatibles.<ref name="NBP_19910916"/> Its [[Expanded memory|EMS]] driver only supports IBM's [[Expanded Memory Adapter]]. The [[input method]] doesn't support the US keyboard nor the Japanese AX keyboard, so it locates some keys at the wrong place. PS/55 keyboards were available from IBM, but it must be used with an AT to [[PS/2 port|PS/2]] adapter because AX machines (thus PC/AT clones) generally have the older 5-pin [[DIN connector]]. Scrolling text with the common [[Tseng Labs ET4000]] graphics controller makes the screen unreadable. This issue can be fixed by the new <code>/HS=LC</code> switch of <code>$DISP.SYS</code> in DOS J4.07/V.<ref name=":6"/><ref name="Schwarzschild_2009"/><ref name="ITmedia_2018"/> "Some VGA clones did not correctly implement the [[Video_display_controller#Types|CRTC]] address wraparound.<ref name="OS2Museum_DOSV"/> Most likely those were Super VGAs with more video memory than the original VGA (i.e. more than 256&nbsp;KB). Software relying on the address wraparound was very rare and therefore the functionality was not necessarily correctly implemented in hardware. On the other hand, the split screen technique was relatively well documented and well understood, and commercial software (especially games) sometimes used it. It was therefore likely to be tested and properly implemented in hardware."

IBM Japan released DOS J5.0/V in October 1991, and DOS J5.0 in December 1991.<ref name="CQ_1712"/> DOS J5.0 combines Japanese DOS and DOS/V. This is the last version developed for the PS/55 display adapter. DOS J5.02/V was released in March 1992.<ref name=":5"/> It added official support for the IBM PS/2 and the US English layout keyboard.

The development of [[MS-DOS]] 5.0/V was delayed because IBM and Microsoft disputed how to implement the [[API]] for input methods. It took a few months to make an agreement that the [[Original equipment manufacturer|OEM]] adaptation kit (OAK) of MS-DOS 5.0/V provided both IAS (Input Assist Subsystem) and MKKC (Microsoft [[Kana]]-Kanji Conversion). Microsoft planned to add the AX application support into DOS/V, but cancelled it because its beta release was strongly criticized by users for lacking compatibility. Some PC manufacturers couldn't wait Microsoft's DOS/V. Toshiba developed a DOS/V [[emulator]] that could run DOS/V applications on a VGA-equipped J-3100 computer. [[AST Research]] Japan and [[Sharp Corporation|Sharp]] decided to bundle IBM DOS J5.0/V. Compaq developed own DOS/V drivers, and released their first DOS/V computers in April 1992.<ref name=":2"/><ref name=":3"/>

On 10 December 1993, Microsoft Japan and IBM Japan released new versions of DOS/V, MS-DOS 6.2/V Upgrade and PC DOS J6.1/V.<ref name="NSS_19931207"/> Although both were released at the same time, they were separately developed.<ref name="NBP_1993_118"/> MS-DOS 6.2/V Upgrade is the only Japanese version of MS-DOS released by Microsoft under its own brand for retail sales. Microsoft Japan continued selling it after Microsoft released MS-DOS 6.22 to resolve [[patent infringement]] of [[DoubleSpace]] [[disk compression]].<ref name="PCW_20020122"/>

IBM Japan ended support for PC DOS 2000 on 31 January 2001,<ref name=":4"/> and Microsoft Japan ended support for MS-DOS on 31 December 2001.<ref name="MS_20010907"/>

Japanese versions of [[Windows 2000]] and [[Windows XP|XP]] have a DOS/V environment in [[NTVDM]]. It was removed in [[Windows Vista]].<ref name="Exconn_20060616"/>

===PC DOS versions===
[[PC&nbsp;DOS]] versions of DOS/V (J for Japanese, P for Chinese (PRC), T for Taiwanese, H for Korean (Hangul)):<ref name="IBM_2007_SurePOS"/>
* IBM DOS J4.0/V "5605-PNA" (version 4.00 – 4.04 were not released for DOS/V)<ref name="Timeline_2014_DOSV"/>
** IBM DOS J4.05/V for [[PS/55]] (announced 1990-10-11, shipped 1990-11-05)<!-- https://www.betaarchive.com/forum/viewtopic.php?t=32715 --><ref name="akm_2013_DOSV"/><ref name="IBM_1990"/><ref name="NBP_1991"/>
** IBM DOS J4.06/V (1991-04)<!-- https://www.betaarchive.com/forum/viewtopic.php?t=33144 --><ref name="akm_2013_DOSV"/><ref name="NBP_1991-04-29"/>
** IBM DOS J4.07/V (1991-07)<!-- https://www.betaarchive.com/forum/viewtopic.php?t=32886 --><ref name="akm_2013_DOSV"/><ref name="Timeline_2014_DOSV"/>
* IBM DOS J5.0/V "5605-PJA" (1991-10),<ref name="IBM_1997_AS400"/><ref name="akm_2013_DOSV"/><ref name="Timeline_2014_DOSV"/> IBM DOS T5.0/V,<ref name="IBM_1997_AS400"/> IBM DOS H5.0/V<ref name="IBM_1997_AS400"/>
** IBM DOS J5.02/V for PS/55 (1992-03)<ref name="akm_2013_DOSV"/><ref name=":5"/>
** IBM DOS J5.02A/V<ref name="akm_2013_DOSV"/>
** IBM DOS J5.02B/V<ref name="akm_2013_DOSV"/>
** IBM DOS J5.02C/V<ref name="akm_2013_DOSV"/>
** IBM DOS J5.02D/V (1993-05)<ref name="Timeline_2014_DOSV"/><ref name="akm_2013_DOSV"/>
** Sony OADG DOS/V (includes IBM DOS J5.0/V and drivers for AX machines)<ref name="NBP_1992"/>
* PC DOS J6.1/V "5605-PTA" (1993-12),<ref name="IBM_1997_AS400"/><ref name="akm_2013_DOSV"/><ref name="Timeline_2014_DOSV"/> PC DOS P6.1/V,<ref name="IBM_1997_AS400"/> PC DOS T6.10/V<!-- update release -->
** PC DOS J6.10A/V (1994-03)<ref name="Timeline_2014_DOSV"/><ref name="akm_2013_DOSV"/>
* PC DOS J6.3/V "5605-PDA" (1994-05)<ref name="IBM_1997_AS400"/><ref name="akm_2013_DOSV"/><ref name="Timeline_2014_DOSV"/>
** PC DOS J6.30A/V<ref name="akm_2013_DOSV"/>
** PC DOS J6.30B/V<ref name="akm_2013_DOSV"/>
** PC DOS J6.30C/V (1995-06)<ref name="Timeline_2014_DOSV"/><ref name="akm_2013_DOSV"/>
* PC DOS J7.0/V "5605-PPW" (1995-08),<ref name="akm_2013_DOSV"/><ref name="IBM_2007_SurePOS"/><ref name="Timeline_2014_DOSV"/> PC DOS P7/V,<ref name="IBM_2007_SurePOS"/> PC DOS T7/V,<ref name="IBM_2007_SurePOS"/> PC DOS H7/V<ref name="IBM_2007_SurePOS"/>
** PC DOS J7.00A/V<ref name="akm_2013_DOSV"/>
** PC DOS J7.00B/V<ref name="akm_2013_DOSV"/>
** PC DOS J7.00C/V (1998-07)<ref name="Timeline_2014_DOSV"/><ref name="akm_2013_DOSV"/>
* PC DOS 2000 Japanese Edition "04L5610" (1998-07)<ref name="akm_2013_DOSV"/><ref name="Timeline_2014_DOSV"/><ref name=":4"/>
<gallery>
IBM DOS J5.02V disks.jpg|IBM DOS J5.02/V
</gallery>

===MS-DOS versions===
[[MS-DOS]] versions of DOS/V:
* Toshiba Nichi-Ei (日英; Japanese-English) MS-DOS 5.0<ref name=":2"/>
* Compaq MS-DOS 5.0J/V (1992-04)<ref name=":3"/>
* MS-DOS 5.0/V (OEM, generic MS-DOS 5.0/V)
* MS-DOS 6.0/V{{Citation needed|date=October 2020}}
* MS-DOS 6.2/V (Retail, 1993-12)<ref name="Timeline_2014_DOSV"/>
* MS-DOS 6.22/V (1994-08){{Citation needed|date=October 2020}}
* [[Fujitsu]] [[Towns OS]] for [[FM Towns]] (only late issues had DOS/V compatibility added){{Citation needed|date=October 2020}}<!-- exact versions with DOS/V support unknown yet -->
<gallery>
MS-DOS 6.2V floppy disks.jpg|Japanese MS-DOS 6.2/V floppy disks
MS-DOS 6.2-V User's Guide Japanese cover 20130608.jpg|MS-DOS 6.2/V user's guide
</gallery>

===DR DOS versions===
[[DR&nbsp;DOS]] versions of DOS/V:
* [[DR DOS 6.0/V]] (Japanese) (1992-07),<ref group="nb" name="NB_DRDOS_ANSI-SYS"/><ref name="ASCII_1992_DRDOS60V"/><ref name="Wein_2012"/><ref name="DRDOS60V_ViewMAX"/><ref name="Timeline_2014_DOSV"/> [[DR DOS 6.0/V]] (Korean)<ref group="nb" name="NB_DRDOS_ANSI-SYS"/>
** [[ViewMAX 2]] (Japanese) (1991–1992)<ref name="DRDOS60V_ViewMAX"/>
** [[NetWare Lite 1.1J]] (Japanese) (1992–1997)<ref group="nb" name="NB_NWL11"/><ref name="Novell_2006_PWN10-NWL11-Patches"/>
* [[Novell DOS 7]] (Japanese)?<ref group="nb" name="NB_NWD70"/><ref name="Paul_1997_NWDOSTIP"/>
** [[Personal NetWare J 1.0]] (Japanese) (1994–1995)<ref group="nb" name="NB_PNW10"/><ref name="Novell_2006_PWN10-NWL11-Patches"/><ref name="Paul_1997_NWDOSTIP"/>
* (DR-DOS 7.0x/V) (2001–2006) (an attempt to build a DR-DOS/V from existing components)<ref name="DRDOS/V"/>

===Extensions===
IBM DOS/V Extension extends DOS/V drivers to set up a variety of text modes for certain video adapters. The High-quality Text Mode is the default 80 columns by 25 rows with 12×24 pixels large characters. The High-density Text Mode (Variable Text; V-Text) offers large text modes with various font sizes. DOS/V Extension V1.0 included drivers for VGA, [[XGA]], PS/55 Display Adapter, [[Super VGA|SVGA]] (800×600) and [[Tseng Labs ET4000|ET4000]] (1024×768).<ref name="NBP_1993-05-10"/> Some of its drivers were included in PC DOS J6.1/V and later.
* IBM DOS/V Extension V1.0 (1993-01) includes V-Text support<ref name="V-Text"/>
* IBM DOS/V Extension V2.0 "5605-PXB"<ref name="V-Text"/>