Jordan Hargraphix BGI Drivers
In 1994 Jordan Hargraphix Software released SVGA BGI drivers version 5.5 that are compatible with some SVGA hardware like ATI or Cirrus Logic cards and VESA VBE-compatible cards. Also there are tweaked VGA drivers for non-standard graphic modes supported by VGA by writing directly into its registers, protected mode driver versions for Turbo Pascal 7.0 and mouse driver (actually cursor handler for unsupported video modes by standard mouse drivers). These drivers were shareware and buying them let receiving their source code and technical support; now they are no longer supported and come as abandonware. Main bugs are lack of aligning bytes support in VESA TrueColor modes (so TrueColor driver is not suitable for NVidia graphic cards) and video memory bank switching bug in mouse driver (since real mode addressing space is 1 megabyte, but some video modes require up to 4 megabyte of memory, it is split into 64 kilobyte banks).
Read more about this topic: Borland Graphics Interface
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