Union UNI-338 Trident TGUI9440 PCI VGA Video Card Vintage DOS Win 3.1 Win95 1994

Union UNI-338 Trident TGUI9440 PCI VGA Video Card Vintage DOS Win 3.1 Win95 1994

The Union UNI-338 is a mid-1990s PCI VGA graphics card built around the Trident TGUI9440 chipset, one of the most widely deployed entry-level 2D VGA controllers of the early PCI era. The card outputs via a standard DB-15 VGA connector and is designed for use in PCI-bus desktop systems. It carries a Trident BIOS Version A5.7, co-developed with Phoenix Technologies and dated 1994.

Specifications & What's Included

• Manufacturer: Union
• Model / PCB: UNI-338, Rev 94V0
• Main Controller Chipset: Trident TGUI9440
• BIOS: Trident Ver. A5.7 — ©1994 Trident Microsystems / ©1990 Phoenix Technologies
• Bus Interface: PCI (full-height bracket)
• Video Output: DB-15 VGA connector
• On-board DRAM: multiple DRAM chips visible on PCB (exact capacity not marked on chips)
• Country of Manufacture: China
• Includes: card only — no drivers, cables, or accessories

Applications

The Trident TGUI9440 was a mainstream PCI VGA chipset produced by Trident Microsystems in the early-to-mid 1990s, appearing in a large number of OEM and third-party board designs of this era. It provides standard SVGA/VGA output and was commonly paired with MS-DOS, Windows 3.1, and Windows 95 systems during the transition from ISA to PCI graphics. The TGUI9440 supports VESA SVGA modes and basic 2D acceleration, making it suitable for everyday desktop use and business applications of the period. Today these cards are sought by retro PC builders and vintage computing enthusiasts who need a period-correct PCI VGA card for mid-1990s DOS or Windows 9x machines — the TGUI9440 has strong driver support under DOS and Windows 3.x/9x and is well-documented in the vintage PC community. This card dates from approximately 1994, identifiable by the Phoenix/Trident BIOS copyright date and the 94V0 UL PCB rating.