Using PROCON's in the Video Card's ROM BIOS
Replacing a Video Card's ROM BIOS font with HVFont
The HVFont ROM BIOS package contains files - and information - that may allow you to replace the full screen VGA OEM "hardware" fonts in your computer's video card with PROCON's Hi-Visibility HVFont.
Doing so means the clearer HVFont will be used in full screen MS-DOS applications running in:-
It will not change the font used in:-
(PROCON's HVDOSBox.FON is designed to be used in "Windowed" Windows, and the HVFont Code Page Information File package allows you to change the fonts used in Windows NT/2000/XP/Vista/7 full screen Console modes.)
What is a VGA OEM Hardware Font?
The so called "hardware" OEM fonts are provided as part of the ROM BIOS in the computer's video card.
BIOS fonts generally use the U.S. English PC8 character set - Codepage 437 - although cards sold in Europe may provide a Codepage 850 implementation.
The full screen fonts are stored as bitmaps in the BIOS data area and are copied into the computer's memory during the boot process. Several font sizes are provided. The most important is 8x16 (8 pixels wide, 16 pixels high), but 8x8 and 8x14 fonts are also common.
All video cards should provide 8x16 and 8x8 fonts. Some cards may not include an 8x14 font, as the VESA standard now encourages manufacturers to drop this font to make room for other video ROM functions.
The actual sizes are a by-product of the history of video card resolutions. In modern PCs, they allow the standard VGA 640x480 pixel resolution to support an 80 character wide display with a user specified number of text lines (usually 25, 28, 30, 40, 43, or 50).
How can these Video Card Fonts be changed?
Modern computer video cards hold their software and font images in EEPROM (Electrically Erasable Programmable Read-Only Memory) so that bugs can be corrected and new features added.
Manufacturer's websites provide updated binary ROM image files - and "flash" utilities that use these image files - so that card purchasers can update the BIOS in their cards.
Unfortunately very few manufacturers' utilities allow you to view - or change - the embedded fonts within the video card's ROM BIOS.
However, for most popular video cards, there are public domain editors available that allow you to replace the manufacturer supplied fonts - and often "tweak" some of the card parameters to optimise performance.
To Update a Video Graphics Card with New Fonts
* * * * * * * * * * * * * * * * CAUTION * * * * * * * * * * * * * * * * * *
The risks can be minimised if you meticulously follow the instructions provided with the manufacturer's flash utility - and take the extra precautions recommended below.
ECHO Press a Key to Restore Old Video ROM, or ECHO <Ctrl><C> to Abort . . . PAUSE SET LGFN=C:\GOBACK.LOG ECHO Starting Video ROM Restoration > %LGFN% . . . then the command to flash the video . . . >> %LGFN% ECHO Video ROM Restore Complete! >> %LGFN% TYPE %LGFN% COPY %LGFN% PRN
While this may sound tedious, it provides a relatively foolproof process that can be largely automated. (Use the included batch files as templates for your own flash procedures).
Restoring improperly flashed "dead" video cards is more tedious!
What is included in the HVFont Video ROM BIOS Package?
The HVFont ROM BIOS package contains:-
Click here to download an Evaluation version of the HVFont Full Screen . (The HVFont ROM BIOS package is part of this package.)
Click here to purchase a licence for any of the HVFont packages.
PROCON CONSTRUCTION SYSTEMS