Headland
Headland were a motherboard chipset manufacturer for PC compatibles during the 80286 era. They were direct rivals of the likes of Chips & Technologies, VLSI, Texas Instruments and Suntac in the early PC chipset market. They acquired G2, a rival chipset manufacturer, around 1988, but continued to sell G2's products as the "G2 Product Line" such as the GC101 and GC102 chips which are believed to be the same as the Headland HT101/HT102 chips. Headland were bought by LSI Logic a few years later, who produced VESA Local Bus graphics controller chips.
HT101/102 (also branded as GC101/102) Datasheet
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GCK113An 80386 chipset released in March 1989. Datasheet
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GCK181A universal PS/2 chipset released in October 1989. Datasheet |
HT11A rare single-chip 286 chipset, released in August 1990. |
HT12/12A
There are two drivers for EMS - one supports UMB (Upper Memory Block), the other adds EMS via the HT12 chipset. You can download these files here. Known to be used on the following systems and motherboards:
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HT18A 386SX single-chip chipset launched in September 1991. |
HT21A 286 and 386SX chipset launched in August 1991. For 286-class motherboards, the HT21 supports 20 MHz CPUs. |
HT22A 286 and 386SX chipset launched in September 1991. For 286-class motherboards, the HT22 supports the Harris 80C286-25 MHz CPU. |
HT25A 386SX [up to 25 MHz] single-chip chipset, supporting CPUs from 2.7V up to 3.6V. This means it also supports the AMD Am386SXLV and Cyrix Cx486SLC CPUs. |
HTK320A two-chip 80386DX chipset suitable for motherboards up to 40 MHz, launched in September 1991. It consisted of the following: HT321 - ISA Bus Controller Datasheet |
HTK340Codenamed "Shasta", this was a 486 chipset launched in June 1992. |