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*UMC...
**UM82C***     (IBM/INTEL Direct replacement)                      c87
Note:  Dates vary  for when  these  chips were  first available.   Two
databooks have been used one from  '86 the other from '91. Not all the
chips  are  listed  in  the  '86  databook, the  date  of  '87  is  an
assumption.

PC/XT:
IBM:	      UMC:	  Desc:
Intel 8284    UM82C84A    25MHz CMOS Clock Generator and Driver
Intel 8288    UM82C88     Bus Controller
Intel 8259    UM8259A     Programmable Interrupt Controller also UM82C59A-2 (CMOS version)
Intel 8237    UM8237A     3-5MHz Programmable DMA Controller (DMAC)
Intel 8253    UM8253*2    2.6-5MHz Programmable Interval Timer
Intel 8255    UM82C55A*   Programmable Peripheral Interface

Note: *  indicates: possible  compatibility, datasheet does  not state
      explicitly. YMMV.

Note: *2  indicates:   The   UM8253   can   be   replaced   with   the
      UM82C54/-2. The datasheet says it is a superset of the 8253, and
      works up to 10MHz. Also it's compatible with the 8254.  AT: IBM:
      UMC: Desc: Intel 82284  UM82C284* 10-12.5MHz Clock Generator and
      Ready Interface Intel 82288  UM82C288* 10-12.5MHz Bus Controller
      Intel 8254  UM82C54/-2 8-10MHz CMOS Programmable  Interval Timer
      Intel  8259  UM8259A   Programmable  Interrupt  Controller  also
      UM82C59A-2 (CMOS version) Intel 8237 UM8237A 3-5MHz Programmable
      DMA Controller (DMAC) 74LS612 UM74HCT612* Memory Mapper MC146818
      RTC  UM82C6818* Real-Time  Clock (RTC)  Intel 8047  ??  Keyboard
      Controller

Note: *  indicates: possible  compatibility, datasheet does  not state
explicitly. YMMV.

**UM82C088     PC/XT Integration Chip                              <91...
**UM82C230     286AT MORTAR Chip Set                               <91...
**UM82C210     386SX/286 AT Chip Set                               <91...
**UM82C3xx     Twinstar & UM82C336F/N & UM82C39x [no datasheet]      ?...
**UM82C380     386 HEAT PC/AT Chip Set                             <91...
**UM82C480     386/486 PC Chip Set                                 c91
***Info:...
***Configurations:...
***Features:...
**UM82C493/491 ??????????????? [no datasheet]                        ?...
**UM8498/8496  486 VL Chipset  "Super Energy Star Green"[no dsheet]c94...
**UM8881/8886  HB4 PCI Chipset "Super Energy Star Green"[no dsheet]c94...
**UM8890       Pentium chipset [no datasheet]                        ?...
**
**Support Chips:
**UM82152      Cache Controller (AUStek A38152 clone)              <91...
**UM82C852     Multi I/O For XT                                    <91...
**UM82C206     Integrated Peripheral Controller                    <91
***Info:...
***Versions:...
***Features:...
**UM82c45x     Serial/Parallel chips                                 ?...
**Other chips:...
*Unresearched:...
*VIA...
**VT82C680     Apollo P6, Pentium-Pro Chip Set               <08/30/96
***Notes:...
***Info:...
***Configurations:...
***Features:
o   High Integration
    - VT82C685 system controller
    - VT82C687 data buffer
    - VT82C586 PCI to ISA bridge
    - Six TTLs for a complete main board implementation
o   Flexible CPU Interface
    - 64 bit Pentium-Pro CPU interface
    - CPU external bus speed up to 66 MHz
    - Supports Pentium-Pro CPU multi-phase bus protocol for split 
      transactions
    - Supports four level deep in-order-queue and deferred transaction
    - Supports APIC multiprocessor protocol
    - GTL+TM bus driver and receiver compatible with Intel 
      specification
o   Fast DRAM Controller
    - Sixteen level (quadwords) of CPU to DRAM write buffers
    - Sixteen level (quadwords) of DRAM to CPU read buffers
    - Fast Page Mode/EDO/Burst EDO/Synchronous-DRAM support in a mixed 
      combination
    - Mixed 1M/2M/4M/8M/16MxN DRAMs
    - Supports 2-way bank-interleaving of 16 MB SDRAM
    - Supports 2-way and 4-way bank-interleaving of 64 MB SDRAM
    - 6 banks up to 1 GB DRAMs
    - Flexible row and column addresses
    - Optional bank-by-bank ECC and parity generation, detection, and 
      correction capability
    - ECC with 1 bit error correction and multi-bit error detection 
      capability
    - 3.3v and 5v DRAM without external buffers
    - Burst read and write operation
    - 5-1-1-1-1-1-1-1 back-to-back Burst EDO and Synchronous DRAM 
      transfer at 66 MHz
    - 532 MB/s peak transfer rate for Burst EDO and Synchronous DRAMs 
      at 66 MHz
    - 266 MB/s peak transfer rate for EDO DRAMs at 66 MHz
    - BIOS shadow at 16 kB increment
    - System management memory remapping
    - Decoupled and burst DRAM refresh with staggered RAS timing
    - Programmable refresh rate, CAS-before-RAS refresh and refresh 
      on populated banks only
o   Intelligent PCI Bus Controller
    - 32 bit 3.3/5v PCI interface
    - Synchronous divide-by-two PCI bus interface
    - PCI master snoop ahead and snoop filtering
    - Concurrent PCI master/CPU/IDE operations
    - Synchronous Bus to CPU clock with divide-by-two from the CPU 
      clock
    - Automatic detection of data streaming burst cycles from CPU to 
      the PCI bus
    - Sixteen levels (double-words) of CPU to PCI posted write buffers
    - Byte merging in the write buffers to reduce the number of PCI 
      cycles and to create further PCI bursting possibilities
    - Zero wait state PCI master and slave burst transfer rate
    - PCI to system memory data streaming up to 132 MByte/sec
    - Sixteen levels (double-words) of post write buffers from PCI 
      masters to DRAM
    - Sixteen levels (double-words) of prefetch buffers from DRAM for 
      access by PCI masters
    - Enhanced PCI command optimization (MRL, MRM, MWI, etc.)
    - Complete steerable PCI interrupts
    - Supports CPU write-back forward to PCI master read to minimize 
      PCI read latency
    - Supports CPU write-back merged with PCI master post-write to 
      minimize DRAM utilization
    - Provides transaction timer to fairly arbitrate between PCI 
      masters
    - Supports five PCI masters in addition to PCI-ISA/IDE/USB bridge
    - PCI-2.1 compliant
o   Enhanced Master Mode PCI IDE Controller with Extension to 
    UltraDMA-33
    - Dual channel master mode PCI supporting four Enhanced IDE 
      devices
    - Transfer rate up to 22 MB/sec to cover PIO mode 4 and multi-word 
      DMA mode 2 drives and beyond
    - Extension to UltraDMA-33 interface for up to 33 MB/sec transfer 
      rate
    - Sixteen levels (doublewords) of prefetch and write buffers
    - Interlaced commands between two channels
    - Bus master programming interface for SFF-8038 rev.1.0 and 
      Windows-95 compliant
    - Full scatter and gather capability
    - Support ATAPI compliant devices
    - Support PCI native and ATA compatibility modes
    - Complete software driver support
o   Universal Serial Bus Controller
    - USB v.1.0 and Intel Universal HCI v.1.1 compatible
    - Eighteen level (doubleword) of data FIFOs with full scatter 
      and gather capabilities
    - Root hub and two function ports with integrated physical 
      layer transceivers
    - Legacy keyboard and PS2 mouse support
o   Plug and Play Controller
    - Dual interrupt and DMA signal steering with plug and play 
      control
    - Microsoft Windows 95TM and plug and play BIOS compliant
o   Sophisticated Power Management and OnNow/ACPI Unit
    - Normal, doze, sleep, suspend and conserve modes
    - System event monitoring with two event classes
    - Two general purpose timers
    - Sixteen general purpose output ports
    - Seven external event input ports with programmable SMI condition
    - Primary and secondary interrupt differentiation for individual 
      channels
    - Clock throttling control
    - Multiple internal and external SMI sources for flexible power 
      management models
    - APM 1.2 compliant models
    - Extension to OnNow and ACPI (Advanced Configuration and Power 
      Interface) support
o   PCI to ISA Bridge
    - Integrated 82C206 peripheral controller
    - Integrated keyboard controller with PS2 mouse supports
    - Integrated DS12885 style real time clock with extended 128 Byte 
      CMOS RAM
    - Integrated USB controller with root hub and two function ports
    - Integrated master mode enhanced IDE controller with enhanced 
      PCI bus commands
    - PCI-2.1 compliant with delay transaction
    - Four double-word line buffer between PCI and ISA bus
    - Supports type F DMA transfers
    - Fast reset and Gate A20 operation
    - Edge trigger or level sensitive interrupt
    - Flash EPROM, 2 MB EPROM and combined BIOS support
o   Built-in Nand-tree pin scan test capability
o   0.5um mixed voltage, high speed and low power CMOS process
o   208 pin PQFP for VT82C685
o   208 pin PQFP for VT82C586
o   208 pin PQFP for VT82C687

**Support chips:
**VT82C505     Pentium/486 VL to PCI Bridge                  <05/30/94...
***Info:...
***Versions:...
***Features:...
**VT82C586/A/B PCI Integrated Peripheral Controller          <10/13/96...
***Info:...
***Versions:...
***Features:...
**VT82C596/A   Mobile PCI Integrated Peripheral Controller   <11/05/97...
***Info:...
***Versions:...
***Features:...
**VT82C686A/B  PCI Super-I/O Integrated Peripheral Ctrl.     <02/10/98...
***Info:...
***Versions:...
***Features:...
**Later P-Pro/II/III/Celeron...
***Notes (Unverified Information!):...
***VT82C691/2BX     Apollo Pro & Pro II           May 98...
***VT82C693         Apollo Pro+                   Dec 98...
***VT82C693A        Apollo Pro 133                Jul 99...
***VT82C694X/MP/Z/A Apollo Pro 133A, 133+ & 133Z  Oct 99...
***VT82C694T        Apollo Pro 133T...
***VT8601           PN133 (ProSavage) (mobile)...
***VT8601/A/T       PM601, PLE133, PLE266 & PLE133T (ProMedia)...
***VT8604/T         PL133 & PL133T (ProSavage)...
***VT8605/6         PM133 & PM133T (ProMedia-II), (ProSavage)...
***VT8607/8         PM266 & PM266T (ProSavageDDR)...
***VT8613           PN266T (mobile)...
***VT8633           Apollo Pro 266                Sep 00...
***VT8653           Apollo Pro 266T & PX-266...
***VT8622/23        CLE266 (mobile)...
***VT????           CM400                         Jan 04...
***Others:...
**Later AMD...
***Notes (Unverified Information!):...
***VT8371           KX-133...
***VT8361           KLE133, Trident Blade 3D      c:2001...
***VT8362/5         KN-133, KM-133 (VS2-K7) ProSavage4...
***VT8363           KT-133, KZ-133...
***VT8363A          KT-133A                       c:2001...
***VT8363E          KT-133E...
***VT8364           KL-133  Savage4 AGP...
***VT8364A          KL-133A Savage4 AGP...
***VT8365A          KM-133A (VS2-K7)  ProSavage4...
***VT8366/8372      KT-266, KT-266DP, KN-266      c:Jan01...
***VT8366A          KT-266A                       c:Sep01...
***VT8367           KT-333                        c:Feb02...
***VT8367A          KT-333A                       c:Feb02...
***?                KM-333, KN-333 Zeotrope AGP ...
***VT8368           KT-400                        c:Aug02...
***VT8375           KL266, KM-266 (VS12-K7) ProSavage8...
***VT8377A          KT-400A                       c:Mar03...
***VT8378           KM-400, KN-400  UniChrome AGP...
***?                KM-400A...
***VT8377?          KT-600                        c:May03...
***VT8379           KT-880                        c:Feb04...
**Other...
***Disk...
***USB/Firewire...
***Network...
***Audio...
***Other...
*VLSI...
**Notes:...
**VL82C***              IBM/INTEL Direct replacement                 ?...
**VL82CPCAT-QC          AT 12 MHz 0/1 ws                           c88...
***Basics:...
***Info:...
***Configurations:...
***Features:...
**VL82CPCPM-QC          AT 16 MHz 0/1 ws [no datasheet]            c88...
***Notes:...
**VL82CPCAT-16QC/-20QC  AT 16 MHz or 20 MHz, 0/1 ws     +386SX     c89...
***Basics:...
***Info:...
***Configurations:...
***Features:...
**VL82CPCPM-16QC/-20QC  AT 16 MHz or 20 MHz, Page-Mode  +386SX     c89...
***Basics:...
***Info:...
***Configurations:...
***Features:...
**VL82C031/032/033      PS/2 Model 30-compatible chip set          c88...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**VL82C286-SET     TOPCAT 286/386SX PC/AT-Compatible Chip Set        ?...
***Info:...
***Configurations:...
***Features:...
**VL82C386-SET     TOPCAT 386DX PC/AT-Compatible Chip Set            ?...
***Info:...
***Configuration:...
***Features:...
**VL82C386sx-SET   TOPCAT 286/386SX PC/AT-Compatible Chip Set        ?...
***Notes:...
**VL82C310         SCAMP-LT                                          ?...
***Info:...
***Configurations:...
**VL82C311         SCAMP-DT                                          ?...
***Info:...
***Configurations:...
***Features:...
**VL82C311L        SCAMP-DT 286                                      ?...
***Info:...
***Configurations:...
**VL82C312         SCAMP Power Management Unit (PMU)                 ?...
***Info;...
***Versions:...
***Features:...
**VL82C315A        SCAMP II, Low-Power Notebook Chipset              ?...
***Info:...
***Configurations:...
***Features:...
**VL82C322A        SCAMP II, Power Management Unit (PMU)             ?...
***Info:...
***Versions:...
***Features:...
**VL82C316         SCAMP II, PC/AT-Compatible System Controller      ?...
***Info:...
***Configurations:...
***Features:...
**VL82C323         SCAMP II, 5 Volt Power Management Unit (PMU)      ?...
***Info:...
***Versions:...
***Features:...
**VL82C380         Single chip 386DX PC/AT Controller +on-chip cache ?...
***Info:...
***Configuration:...
***Features:...
**VL82C325             VL82C386SX System Cache controller            ?...
***Info:...
***Versions:...
***Features:...
**VL82C335             VL82C386DX System Cache ctrl. [no d.sheet]    ?...
***Notes:...
**VL82C315A/322A/3216  Kodiak 32-Bit Low-Voltage Chip Set            ?...
***Info:...
***Configurations:...
**VL82C420/144/146     SCAMP IV [no datasheet, some info]          c93...
***Notes:...
**VL82C480         System/Cache/ISA bus Controller                   ?...
***Info:...
***Configurations:...
***Features:...
**VL82C481         System/Cache/ISA bus Controller                 c92...
***Basics:...
***Info:...
***differences to the VL82C480:...
***Configurations:...
***Features:...
**VL82C486         Single-Chip 486, SC486, Controller                ?...
***Basics:...
***Info:...
***Configurations:...
***Features:...
**VL82C425         486 Cache controller                              ?...
***Info:...
***Versions:...
***Features:...
**????????         Cheetah 486, PCI [no datasheet]                   ?...
***Info:...
**VL82C3216        Bus Expanding Controller Cache with write buffer  ?...
***Info:...
***Versions:...
***Features:...
**VL82C521/522     Lynx/M                                            ?...
***Info:...
***Configurations:...
***Features:...
**VL82C530         Eagle Ð                                         c95...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**VL82C541/543     Lynx                                            c95...
***Notes:...
***Basics:...
***Info:...
***Configurations:...
***Features:...
**VL82C591/593     SuperCore 590                                   c94...
***Notes:...
***Configurations:...
**VL82C594/596/597 Wildcat                                         c95...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**I/O Chips:
**VL82C106 Combination I/O chip                                      ?...
***Info:...
***Versions:...
***Features:...
**VL82C107 SCAMP  Combination I/O chip                               ?...
***Info:...
***Versions:...
***Features:...
**VL82C108 TOPCAT Combination I/O chip                               ?...
***Info:...
***Versions:...
***Features:...
**VL82C110 Combination I/O chip                                      ?...
***Info:...
***Versions:...
***Features:...
**VL82C113 SCAMP  Combination I/O chip                               ?...
***Info:...
***Versions:...
***Features:...
**VL82C114 Combination I/O chip                                      ?...
***Info:...
***Versions:...
***Features:...
**Video: ...
**Disk:...
**Modems:...
**Other:...
***VLX*XXX...
***VL16XXX...
***VL65XXX...
***VL80XXX...
***VL82XXX...
***VL85XXX...
***VL86XXX...
***VXXXXXX...
**Not sure if they actually exist...
*Western Digital...
**Notes:...
**FE2010/A      XT CPU controller integrated Circuit         >11/22/85...
***Notes:...
***Info:...
***Versions:...
***Features:...
**FE2011        CPU Core Logic for PS/2 Model 30 Compatible       c:87...
***Info:...
***Versions:...
***Features:...
**FE3400/B      80286-Based AT Compatible CPU Core Logic (12 MHz) c:86...
***Info:...
***Configurations:...
***Features:...
**FE3500/B      80286-Based AT Compatible CPU Core Logic (12 MHz) c:87...
***Notes:	...
***Info:...
***Configurations:...
***Features:...
**FE3600/A/B/C  16/20MHz AT Chip set                              c:88...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**FE5300        CPU Core Logic for PS/2 Model 50/60 Compatibles   c:87...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**FE5400        CPU Core Logic for PS/2 Model 50/60 Compatibles   c:87...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**FE6500        CPU Core Logic for PS/2 Model 70/80 Compatibles   c:88...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**WD6400SX/LP   CPU Core Logic for PS/2 386SX Compatibles          <90...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**WD6500        CPU Core Logic for PS/2 386DX/486 Compatible       <90...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**WD7600A/LP/LV System Chip Set for 80286 or 80386SX         <11/25/91...
***Info:...
***Configurations:...
***Features:...
**WD7700/LP     System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
***Info:...
***Configurations:...
***Features:...
**WD7855        System controller for 80386SX                <09/25/92...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**WD7900/LP/LV  System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**WD8110        System controller for 80386DX/486            <11/30/93...
***Notes:...
***Info:...
***Configurations:...
***Features:...
**
**Support Chips:
**WD76C20x   Floppy, RTC, IDE and Support Logic Device       <11/25/91...
***Info:...
***Versions:...
***Features:...
**WD76C30x   Perip. Ctrl, Interrupt Multiplex, and Clock Gen <11/18/91...
***Notes:...
***Info:...
***Versions:...
***Features:...
**WD7615     Desktop Buffer Manager                          <04/15/92...
***Info:...
***Versions:...
***Features:...
**WD7625     Desktop Buffer Manager                          <10/01/92...
***Info:...
***Versions:...
***Features:...
**WD8120LV   Super I/O [no datasheet]                                ?
**Other Chips:...
*Winbond
**Chipsets:
**W83C491/92  VL-Bus chipset (Symphony Wagner SL82C491/2)[no datasheet]
**W83C553F    System I/O Controller With PCI Arbiter           c:sep95...
**W83628F/29D PCI TO ISA Bridge Set                                c98...
**W83626F/D   LPC TO ISA Bridge Set                                <00...
**
**Multi I/O:
**W83757          SUPER I/O  CHIP                                  <92...
**W83767F         ??           Multi I/O  [no datasheet]
**W83777F/87F     Power I/O   (Multi I/O)                          <95...
**W83877F         WINBOND I/O (Multi I/O)                          <96...
**W83877TF/TG/TD  WINBOND I/O (Multi I/O)                          c97...
**W83977F/G/AF/AG WINBOND I/O (Multi I/O)                          c97...
**W83977TF        WINBOND I/O (Multi I/O)                          c97...
**W83977EF        WINBOND I/O (Multi I/O)                          <98...
**W83977ATF       WINBOND I/O (Multi I/O)                          <98...
**
**Disk Controller:
**W83759/A/F/AF   Advanced VL-IDE Disk Controller                  <96...
**W83769          Local Bus IDE Solution                           <94...
**
**UARTS:
**W86C250A  UART (equivalent of INS8C250A) [no datasheet]
**W86C450/P Universal Asynchronous Receiver/Transmitter         <Jul89...
**W86C451   I/O controller for IBM PC/AT/XT                     <Jul89...
**W86C452   I/O controller for IBM PC/AT                         Jul89...
**W86C456   I/O controller [no datasheet]                            ?
**W860551/P UART with FIFO and Printer Port Controller             <94...
**
**Other:...
*ZyMOS...
*General Sources:...

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