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**CS8221   NEW Enhanced AT (NEAT)   (82C211/82C212/82C215/82C206)  c86
***Info:
The  CS8221  PC/AT  compatible  NEAT  CHIPSet  is  an  enhanced,  high
performance 4  chip VLSI implementation (including the  82C206 IPC) of
the control logic  used on the IBM Personal  Computer AT. The flexible
architecture of  the NEAT CHIPSet  allows it to  be used in  any 80286
based system.

The  CS8221 NEAT  CHIPSet  provides a  complete  286 PC/AT  compatible
system, requiring only 24 logic components plus memory devices.

The CS8221 NEAT CHIPSet consists of the 82C211 CPU/Bus controller, the
82C212  Page/interleave   and  EMS  Memory   controller.   the  82C215
Data/Address buffer  and the 82C206  Integrated Peripherals Controller
(IPC).

The NEAT  CHIPSet supports the local  CPU bus, a 16  bit system memory
bus, and the  AT buses as shown in the NEAT  System Block Diagram [see
datasheet].  The  82C211 provides synchronization  and control signals
for all  buses. The 82C211 also  provides an independent  AT bus clock
and allows for  dynamic selection between the processor  clock and the
user  selectable AT  bus clock.   Command delays  and wait  states are
software configurable,  providing flexibility  for slow or  fast peri-
pheral boards.

The  82C212  Page/interleave and  EMS  Memory  controller provides  an
interleaved  memory sub-system  design with  page mode  operation.  It
supports  up to 8  MB of  on-board DRAM  with combinations  of 64Kbit,
256Kbit  and 1Mbit  DRAMs. The  processor  can operate  at 16MHz  with
0.5-0.7 wait  state memory  accesses, using 100  nsec DRAMs.   This is
possible through  the Page Interleaved memory scheme.   The Shadow RAM
feature  allows taster  execution of  code  stored in  EPROM, by  down
loading code  from EPROM to  RAM. The RAM  then shadows the  EPROM for
further code execution. In a  DOS environment, memory above 1Mb can be
treated as LIM EMS memory.

The  82C215 Data/Address  buffer provides  the buffering  and latching
between the local CPU address  bus and the Peripheral address bus.  It
also provides buffering between the  local CPU data bus and the memory
data bus. The parity bit  generation and error detection logic resides
in the 82C215.

The 82C206  Integrated Peripherals Controller  is an integral  part of
the  NEAT CHIPSet.   It is  described in  the 82C206  Integrated Peri-
pherals Controller data book.

System Overview
The CS8221  NEAT CHIPSet  is designed for  use in  12 to 16  MHz 80286
based  systems  and  provides  complete  support  for  the  IBM  PC/AT
bus.  There are four  buses supported  by the  CS8221 NEAT  CHIPSet as
shown in  Figure 1 [see  datasheet]: CPU local  bus (A and  D), system
memory bus (MA and MD), I/O channel bus (SA and SD), and X bus (XA and
XD). The system  memory bus is used to interface the  CPU to the DRAMs
and EPROMs  controlled by the 82C212.   The I/O channel  bus refers to
the bus supporting the AT bus  adapters which could be either 8 bit or
16 bit  devices. The X bus refers  to the peripheral bus  to which the
82C206 IPC and other peripherals are attached in an IBM PC/AT.


***Configurations:...
***Features:...
**CS8223   LeAPset                  [no datasheet]                   ?
**CS8225   CHIPS/250 PS/2 50/60     [no datasheet, some info]      c88...
**CS8227   CHIPSlite                (82C235/82C641)                  ?...
**CS8230   386/AT                   (82C301/302/303/304/305/306)cFeb87...
**CS8231   TURBO CACHE-BASED 386/AT (82C301/307/303/304/305/306)   c86...
**CS8232   CMOS 386/AT              (82C301/302/303/304/305/306)   c86...
**CS8233   PEAK/386 AT (Cached)     (82C311/82C315/82C316)     c:Dec90...
**CS8236   386/AT                   (82C301/2/3/4/5/6/206)         c86...
**CS8237   TURBO CACHE-BASED 386/AT (82C301/7/3/4/5/6/206)         c86...
**CS8238   CHIPS/280 & 281 (386 MCA)(82C321/322/325/223/226)   c:Aug89...
**CS82310  PEAK/DM 386 AT           (82C351/82C355/82C356)         c91...
**CS8281   NEATsx (386SX)           (82C811/812/215/206)       c:Dec89...
**CS8283   LeAPset-sx               (82C841/82C242/82C636)     c:Mar90...
**CS8285   PEAKsx                   (82C836/82C835)                c91...
**CS8288   CHIPSlite-sx             (82C836/82C641/82C835)          c?...
**CS4000   WinCHIPS                 (64200/84021/84025)            c92...
**CS4021   ISA/486                  (84021/84025)                  c92...
**CS4031   CHIPSet                  (84031/84035)              5/10/93...
**CS4041/5 CHIPSet                  (84041/84045)              2/10/95...
**CB8291   ELEAT                    [no datasheet]                 c90...
**CB8295   ELEATsx                  [no datasheet]                 c90...
**82C100   IBM PS/2 Model 30/Super XT                                ?...
**82C110   IBM PS/2 Model 30/Super XT                                ?...
**82C235   Single Chip AT (SCAT)                                   c89...
**82C836   Single Chip 386sx (SCATsx)                              <91...
**F8680/A  PC/CHIP Single-Chip PC                                  c93...
**
**Support Chips:
**64200    (Wingine) High Performance 'Windows Engine'         c:Oct91...
**82C206   Integrated Peripheral Controller                        c86...
**82C601/A Single Chip Peripheral Controller                 <08/30/90...
**82C607   Multifunction Controller                             <Jun88...
**82C710   Universal Peripheral Controller                     c:Aug90...
**82C711   Universal Peripheral Controller II                  c:Jan91...
**82C712   Universal Peripheral Controller II                  c:Jan91...
**82C721   Universal Peripheral Controller III                 c:May93...
**82C735   I/O Peripheral Controller With Printgine            c:Jul93...
**82C835   Single CHIP 386sx AT Cache Controller               c:Apr91...
**F87000   Multi-Mode Peripheral Chip                         11/23/93...
**Other:...
**Disk:...
**Video:
F64300 	Wingine DGX 2MB, (appears to be a VLB version adapted from the proprietary 64200)
F64310 	Wingine DGX 2MB  (appears to be a PCI version adapted from the proprietary 64200)

OC65540   VGA BIOS  c:95
OC65545   VGA BIOS same as 540 but has hardware overlay feature.

94C2001   PUMA (Programmable Universal Micro Accelerator) 50MHz Video accelerator

82C840 	  8514/A clone
82C9001A  Video controller

82C404          Programmable clock synthesizer
82C402 	  	VGA clock Synthesizer
82C411          Flat panel color pallet/DAC

82C425 	  	82C425 	CGA, CRT+LCD support, greyscale on LCD, supports two softfonts (up to 8x16 pixels) allowing 512 characters on screen, no snow
82C426 	  	82C426 	CGA, CRT, color LCD+AT&T400 support, max 32KB RAM
82C450 	  	82C450 	1MB VRAM, max 800x600 256color
82C451 	  	82C451 	VGA 256KB DRAM, max 800x600 16color c:90
82C452 	  	82C452 	1MB DRAM, max 640x480 256color, 1024x768 16color
82C453 	  	82C453 	1MB DRAM, max 800x600 256color
82C455 	  	82C455 	256KB DRAM Flat Panel version
82C456, 456A  	82C456 	256KB DRAM Flat Panel/CRT
82C457 	  	82C457 	Full color

82C45x series are VGA

'The 655xx series chips are SVGA video controller chips for flat panel
displays and CRTs. They also provide  some level of CGA, MDA, EGA, and
Hercules  compatibility, and  various accelerator  features. They  are
designed  with various  features  for reducing  power consumption  and
optimizing display quality. 
source:http://www.igl.ku.dk/~fsp/varia/ct5xx.html

see the above source for more details.

82C481 True-Color Graphics Accelerator Wingine?

F65510 	65510 	LCD / CRT
F65520 	65520 	1MB D/VRAM, Full color, max 1280x1024 16color & 800x600 256 color
F65525 	65525 	LCD / CRT
F65530 	65530 	1MB D/VRAM, Full color, max 1280x1024 16color & 800x600 256 color, VLB
F65535 	65535 	LCD / CRT
F65540 	65540 	same as 65545 but without BitBLT and hw cursor
F65545 	65545 	mobile, 512-1024KB DRAM, ISA / PCI / VLB
65546 	  	65546 	 
F65548 	65548 	 
F65550 	65550 	HighQV32, mobile, 1-2MB DRAM, PCI / VLB
B65554 	65554 	HighQV64, mobile, 1-4MB DRAM, BGA
F65555 	65555 	HighQVPro, mobile, 1-4MB EDO, BGA
F68554 	68554 	HiQVision
F68555 	68555 	 
F69000  69000 	
M69000 	69000 	HighQVideo, mobile, 83MHz RAM, 2MB SDRAM on die, PCI / AGPx1, 135MHz RAMDAC, BGA, MiniBGA
F69030 	69030 	HighQVideo, mobile, 100MHz RAM, 4MB SDRAM on die, PCI / AGPx1, 170MHz RAMDAC, BGA, MiniBGA


*Contaq  . . . . . [no datasheets, some info]...
*Efar Microsystems [no datasheets, some info]...
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*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel...
**82489DX       Advanced Programmable Interrupt Controller    10/12/92
***Notes:...
***Info:...
***Versions:...
***Features:...
**82495DX/490DX DX CPU-Cache Chip Set                           <Sep91...
**82495XP/490XP Cache Controller / Cache RAM (for i860)       06/05/91...
**82496/491     Cache Controller / Cache RAM (for P5 Pentium) 03/22/93...
**82497/492   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94
***Notes:...
***Info:...
***Configurations:...
***Features:...
**82498/493   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
**800 series...
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