This is a Zeos branded card based on an uncommon NCR 77C22E+ chipset. This is likely a 32bit GUI design with a 16bit host bus interface. A solution that is not dissimilar to Cirrus Logic GD542x VLB cards.
The card likely only appeared in Zeos line of 486 PCs at the early days of the VESA local bus in early 1992 or 1993. The OEM nature of the card is highlighted by the absence of standard stuff like normal socketed VGA bios or a feature connector.
DOS performance is relatively good. However, performance in Windows acceleration is rather poor for a VLB card. In some benchmarks, it is lagging even behind ISA cards. The card is not supported by UniVBE, but some extra VESA and text modes can be enabled by loading a driver in CONFIG.SYS.
Surprisingly, Windows 3.1 drivers I’ve found, offer no 16/24bit modes so the maximum the card can do is 256 colours. Not sure if this is a limitation of drivers or the chipset, although the Bt475 80 MHz RAMDAC should in theory support direct/true colour modes.