In DOS, if you want graphics above the VGA-modes, you need the VESA BIOS EXTENSIONS
(VBE). Often cards only support a limited subset of VESA modes and there are different
versions of the VESA standard (1.2, 2.0, 3.0).
You can gain full VESA support if you have a card specific VESA driver.
FreeBE/AF is a free software project to support full VESA and VBE/AF (2D VESA graphics
acceleration) on a number of cards.
It contains drivers for ATI, Avance Logic, Cirrus, Matrox, Nvidia, Paradise, S3, Trident, Tseng, V7.
There was a freeware tool called UNIVESA and later UNIVBE that gave VESA support to a set
of graphics hardware. It was later part of the shareware Scitech Display Doctor, which
is no longer developed.
Download of Scitech Display Doctor
Old freeware UNIVBE
There is a driver written from Carsten Sorensen for the G100, G200 and G400-chip.
It's called Gx00VBE and works very well.
Collection of VESA-Drivers
I found this one while searching for several VESA-drivers. It contains several drivers for older cards. Try it if you don't find any other help. Also contains the last free Version of UNIVBE.
Contains drivers for: AHEAD, APPIAN, ATI, BOCA, CIRRUS, COMPAQ, C_AND_T, DIAMOND, EVEREX, GENOA, HEADLAND, HERCULES, IBM, IRIS, OAK, ORCHID, PARADISE, PERFECTV, SIGMA, SPIDER, STB, TECMAR, TI_PORT, TRIDENT, TSENG, UNIVESA, VIDEO7, WESTERN
VINFO will display your gfx board's VBE version and all supported videomodes.
It's written by StyX/HeadcrasH.