UMC
UMC are a motherboard chipset manufacturer for PC compatibles. They also produced some CPUs under license from Intel before designing their own.
 UM82C088
The UM82C088 is a PC/XT Integration chip - basically a single-chip chipset for XT-compatibles.
It was a direct clone of the Texas Instruments TACT80101.
Datasheet |
 UM82C210
A chipset designed for 286 or 386SX PCs.
The '210 consisted of 3 chips:
- UM82C211 - System Controller
- UM82C212 - Memory Controller
- UM82C215 - Data /Address Buffer
Datasheet |
UM82C330
Called "Twinstar", this was a 386 chipset.
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UM82C390
This was an 80386 chipset that supported 40 MHz processors such as the Am386DX-40.
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UM82C482F, 82C481BF
A 486 motherboard chipset
Motherboards that use this chipset are:
Elitegroup UM486V-AIO
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  UM82C491F / 82C493F
This was an 80386 chipset.
Award BIOS Chipset Code: 214X2 or 2C4X2
Motherboards that use this chipset are:
Chicony CH-491E
Elitegroup UC4913
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  UM8498F, UM8496F
This was an 80386 and 80486 chipset. Supports write-back level 1 cache.
Award BIOS Chipset Code: 2C4X6
Images: Socket 3 VLB Motherboard
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UM8881F, UM8886F
Another 486 chipset. Supports write-back level 1 cache.
Award BIOS Chipset code: 2A4X5
Motherboards that use this chipset are:
Chicony TK8880F
Biostar MB-8433UUD
EliteGroup UM8810P-AIO
Shuttle HOT-433
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