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**82C721   Universal Peripheral Controller III                 c:May93
***Info:
The CHIPS  82C721 enhanced I/O peripheral controller  is a single-chip
solution  offering  complete  I/O  capabilities for  PC/AT  and  PC/XT
environments.  The  82C721   supports  motherboard  applications  with
configuration via software.

The  82C721  features  a   floppy  disk  controller,  a  digital  data
separator, two 16450 compatible UARTs, a bi-directional parallel port,
an IDE interface control logic and a game port chip select.

The floppy  disk controller is software compatible  with NEC uPD72065B
floppy  disk controller.  The  controller supports  up to  four drives
directly. The digital data separator is capable of data transfer rates
up to 500kb/sec and requires no external components.

The 82C721 has two UARTs  which are compatible with NS16450 UARTs. The
IDE control logic provides a  complete IDE interface for embedded hard
disk  drives.  The  bidirectional  parallel  port  maintains  complete
compatibility with ISA and PS/2  parallel ports.  It can be configured
for either output mode or for bidirectional mode.

The  configuration   RAM  and  circuitry   support  programmable  base
addresses for  all the registers. Selection of  sources of interrupts,
enabling and configuring of on-chip  subsystems and the control of the
configuration  process itself  are also  handled by  this RAM  and its
associated circuitry.  The game port chip select provides a predefined
I/O address decode for games and joy stick applications.

The 82C721,  designed for  motherboard applications, is  provided with
several  power  management features,  which  are controllable  through
hardware  or  software. In  hardware,  the  device  can be  completely
powered down through  a power-down pin.  In this  mode, all inputs are
disabled, all outputs are inactive,  and the contents of all registers
are  preserved  (as long  as  the  power  supply is  maintained).   In
software,   the  device   allows  each   port  to   be   powered  down
independently.

The  82C721 features 24mA  drivers for  output buffers,  including the
host  data bus  and  the parallel  port  data bus.  The floppy  output
drivers  are  capable  of  sinking  48mA. The  host  interface  is  PC
compatible and can be connected directly to the ISA bus.

***Versions:...
***Features:...
**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]...
*ETEQ...
*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel...
**82395SX     Smart Cache                                     12/17/90
***Notes:...
**82396SX     Smart Cache                                     12/17/90...
**82485       Turbo Cache (and 485Turbocache)                      c90...
**82489DX       Advanced Programmable Interrupt Controller    10/12/92...
**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...
**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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