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**450NX  (?)            06/29/98:
Chips:
[82454NX] (PXB) [82453NX] (MUX) 
[82452NX] (RCG) [82451NX] (MIOC) 
[82371EB] (PIIX4E),                            
CPUs:          Single/Dual/Quad P-II Xeon/P-III Xeon
DRAM Types:    FPM EDO 2-way Interleave 4-way Interleave
Mem Rows:      8
DRAM Density:  16Mbit 64Mbit
Max Mem:       8GB
ECC/Parity:    Both
AGP speed:     N/A
Bus Speed:     100
PCI Clock/Bus: 1/3


**?????  (Profusion)    c:99...
**800 series...
*Headland/G2...
**GCK181        Universal PS/2 Chip Set                        c:Mar89
***Info:
The GCK181  product family  provides a universal  engineering platform
for PS/2 compatible systems using  the Intel 80286, 80386, and 80386SX
microprocessors. This  chip set introduces the  most highly integrated
solution for  manufacturing high performance  PS/2 compatible computer
systems.

The GC181 CPU/Bus Controller initiates and controls all bus cycles. It
controls the interface to the Micro Channel, address and data buffers,
CPU,  DMA  and Memory  Controllers.   Full  Micro  Channel support  is
provided including Matched Memory  Cycles and all timing requirements.
This  device  also  integrates  reset  control  and  clock  generation
logic. It is packaged in a 68 pin PLCC.

The GC182  Memory Controller interfaces  the CPU and Micro  Channel to
System DRAM. Four  DRAM chip sizes are supported:  lMxl, 1Mx4, 256kx1,
256Kx4.   These can  be configured  to 8  MBytes  of interleaved/paged
memory. Four memory modes are selectable to meet IBM Model 50/60/70/80
memory requirements.   Zero wait state  page mode is achievable  at 20
MHz with 80ns  DRAMs. Package type is 120 pin  PQFP (plastic quad flat
pack).

The  GC183  DMA Controller  provides  8  DMA  channels, supporting  24
address bits and 8 or 16  bit data transfers. This device provides the
Micro  Channel with  15  levels  of bus  arbitration  and support  for
multiple  bus masters.  It also  contains DRAM  refresh logic  and NPU
support logic.  Package type is 160 pin PQFP.

The GC184 Address/Data Buffer integrates approximately 44 TTL packages
otherwise required  in at  P8/2 system.  It is packaged  in a  160 pin
PQFP.

The GC186 Peripheral Controller  interfaces peripherals with the Micro
Channel. It supports 15  interrupt channels, the refresh rate counter,
and three programmable timers. It  also contains PS/2 POS Registers, a
PS/2  and AT  compatible  parallel port,  address  decodes for  serial
ports, floppy  disk, keyboard, real  time clock and CMOS  RAM. Package
type is 160 pin PQFP

***Configurations:...
***Features:...
**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...
**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...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
**SL9090/A Universal PC/AT Clock Chip                           <oct88
***Info:...
***Versions:...
***Features:...
**SL9095   Power  Management Unit                                    ?...
**SL9151   80286 Page Interleave Memory Controller (16-25MHz)        ?...
**SL9250   80386SX Page Mode Memory Controller (16/20MHz 8MB)        ?...
**SL9251   80386SX Page Interleave Memory Controller         <04/13/90...
**SL9252   80386SX System and Memory Controller              <06/12/90...
**SL9350   80386DX Page Mode Memory Controller (16-25MHz 16MB)       ?...
**SL9351   80386DX Page Interleave Memory Controller (33MHz)         ?...
**SL9352   80386DX System and Memory Controller              <06/12/90...
**SLXXXX   Other chips...
**
**VT82C470     "Jupiter", Chip Set (w/o cache) 386 [no datasheet]    ?
**VT82C475     "Jupiter", Chip Set (w/cache) 386   [no datasheet]    ?
**VT82C486/2/3 "GMC chipset"            [no datasheet, some info]    ?...
**VT82C495/480 "Venus" Chip Set                    [no datasheet]    ?
**VT82C495/491 ? EISA Chip Set          [no datasheet, some info]  <93...
**VT82C496G    Pluto, Green PC 80486 PCI/VL/ISA System       <05/30/94...
**VT82C530MV   3.3V Pentium chipset [no datasheet, some info]<05/30/94...
**VT82C570M    Apollo Master, Green Pentium/P54C             <06/22/95...
**VT82C580VP   Apollo VP,  Pentium/M1/K5 PCI/ISA System      <02/15/96...
**VT82C580VPX  Apollo VPX, VPX/97, Pentium with 66/75MHz Bus <01/09/97...
**VT82C590     Apollo VP2, VP2/97, Single-Chip Pentium 66MHz <01/10/97...
**VT82C597/AT  Apollo VP3, Single-Chip for Pentium with AGP  <10/03/97...
**VT82C598MVP  Apollo MVP3,Single-Chip 66/75/83/100MHz & AGP <09/22/97...
**VT8501       Apollo MVP4,Single-Chip 66-100MHz & AGP       <11/04/98...
**VT82C680     Apollo P6, Pentium-Pro Chip Set               <08/30/96...
**Support chips:
**VT82C505     Pentium/486 VL to PCI Bridge                  <05/30/94...
**VT82C586/A/B PCI Integrated Peripheral Controller          <10/13/96...
**VT82C596/A   Mobile PCI Integrated Peripheral Controller   <11/05/97...
**VT82C686A/B  PCI Super-I/O Integrated Peripheral Ctrl.     <02/10/98...
**Later P-Pro/II/III/Celeron...
**Later AMD...
**Other...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...

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