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**440 series:
***440FX (Natoma)       05/06/96...
***440LX (Balboa)       08/27/97...
***440BX (Seattle)      c:Apr'98...
***440DX (?)            c:?...
***440EX (?)            c:Apr'98...
***440GX (Marlinespike) 06/29/98...
***440ZX & 440ZX-66 (?) 01/04/99...
***440ZX-M (?)          05/17/99...
***440MX (Banister)     05/17/99...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
**800 series...
*Headland/G2...
**Notes:
InfoWorld Apr 10, 1989 p42 - Video Severn and G-2 Will Merge to form
Headland Technology.
...affiliate of LSI logic.

According to:
http://www.vgamuseum.info/index.php/news/itemlist/category/15-headland-technology

Graphics chips were renamed from  GC*** to HT***. In this document any
part no. that differs only by  GC/HT have been assumed to be a renamed
part.

**GC101/102     12/16MHz PC/AT Compatible Chip Set             c:Feb88...
**GC101/102/103 12/16MHz PC/AT Compatible Chip Set + EMS 4.0   c:Jul89...
**GCK113        80386 AT Compatible Chip Set                   c:oct89...
**GCK181        Universal PS/2 Chip Set                        c:Mar89...
**HT11          Single 286 AT Chip [no datasheet]               <Aug90...
**HT12/+/A      Single 286 AT Chip with EMS support            c:Aug90...
**HT18          80386SX Single Chip                            c:Sep91...
**HT21          386SX/286 Single Chip (20 MHz)                 c:Aug91
***Info:...
***Configurations:...
***Features:
o   Single Chip 80386SX/286 PC/AT Compatible Solution for CPU Clock 
    Speeds to 20MHz
o   SX Mode or 286 Mode
o   Supports up to 8 MB DRAM using 1M or 256K Devices in by 1 or 4 
    configuration
o   Page Mode and 2 or 4-Way Interleaving
o   LIM EMS 4.0 Support in Hardware using 2 Sets of 32 EMS Registers
o   8-Bit or 16-Bit BIOS Support
o   Asynchronous AT Bus Clock
o   Supports up to 12 MHz Backplane Operation
o   Programmable DRAM Timing
o   Port 92 Alternate GATEA20 and Hot Reset
o   Shadow RAM support over entire C0000-DFFFF range in 16K 
    increments
o   BIOS Shadow support in 64K increments
o   Built-in Sleep Mode
o   Three-state control pins for board level testing
o   HCMOS Technology

**HT22          386SX/286 Single Chip (25 MHz)                 c:Sep91...
**HT25          3-volt Core Logic for 386SX                    c:Dec92...
**HT35          Single-Chip Peripheral Controller [partial info]     ?...
**HTK320        386DX Chip Set                                 c:Sep91...
**HTK340        "Shasta" 486 Chip Set                          c:Jun92...
**Support Chips:
**HT44          Secondary Cache                                c:Jun92...
**Other:...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
**82C822         PCIB (VLB-to-PCI bridge)                         c:94
***Notes:...
***Info:...
***Versions:...
***Features:...
**Other:...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
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*Unresearched:...
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