#BC C128 HD WIDE FONT FREE DRIVERS#

IBM also followed these implementations and released add-on drivers as 'DOS/V EXTENSION' package. Some drivers supported CGA for pocket PCs. Most of them supported SVGA and the graphics accelerator for wide character screen with fast drawing. Some magazines related to DOS/V started to issue, and DOS/V drivers with new functions were released by hackers in succession.ДЄs for the display drivers, it supported some type of display sub-systems in addition to the regular VGA. The new entry of DOS/V architecture into the mature architecture as Japanese business PC was a big topic. DOS/V and FONTXДЄt that time, NEC PC-9800 series PCs that supports hardware Kanji character screen was occupying the business PC market in Japan. The font data amounted to 200K bytes is placed on EMB memory, so that it does not consume conventional momory but the DOS/V requires 80286 or higher. It loads the font files to the memory on start up and it works as a font server via system BIOS (INT 15h).

#BC C128 HD WIDE FONT FREE DRIVER#

The font driver ($FONT.SYS) manages the Kanji font. The display driver also supports virtual VRAM to minimize cost of development and porting the applications, however, supporting the Japanese was not easy because of handling of double byte character that not exist in alphabet bloc. The reason of only a few applications is that the most of DOS applications bypass the video BIOS and write characters into the VRAM directly. This enabled _a few_ English applications to handle Japanese without any modification.

The character is drawn on the graphic screen instead of character screen, therefore it can display arbitrary fonts including Kanji. The display driver ($DISP.SYS) extends the video BIOS (INT 10h) and it processes the character output request by application program. The 'V' added end of the product name denotes VGA and it means 'IBM Japanese DOS version 4.0 for VGA'.

Right image shows the system diagram of DOS/V. It could display Kanji on the display of IBM AT or compatibles without any add-on board. The DOS/V consists of PC DOS and additional device drivers to handle Japanese characters (Kanji). In early '90s, 'IBM DOS J4.0/V' called DOS/V was released. DOS/V - FONTX - Electronics Projects What is DOS/V?

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