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*Forex . . . . . . [List only, no datasheets found]
FRX36C200/100         386
FRX36C300/200         386 Write Through
FRX36C300/46C402      386 Write Through
FRX36C311             Single Chip 386SX with Cache
FRX46C411/402         386 Write Through
FRX46C411/412         386 Write Through
FRX46C421A/422        386 Write Back
FRX46C521A            ?
FRX58C613/601A        ?
FRX58C613A/602B/601B  ?

*Intel...
*Headland/G2...
*HMC (Hulon Microelectronics)
**HMC82C206 Integrated Peripherals Controller (10MHz C&T 82c206)     ?...
*Logicstar...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)
**SN74LS610/2 IBM AT: SN74LS610, SN74LS612 Memory Mappers          <84...
**TACT82000   3-Chip 286 [no datasheet]                            c89...
**TACT82411   Snake  Single-Chip AT Controller                     c90...
**TACT82S411  Snake+ Single-Chip AT Controller [no datasheet]      c91...
**TACT83000   AT 'Tiger' Chip Set (386)                            c89...
**TACT84500   AT Chip Set (486, EISA) [no datasheet, some info]    c91...
**Other:...
*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
**SL9XXX   FlexSet family General information...
**SL9011   System Controller (80286/80386SX/DX, 16/20/25MHz)    <Jan90...
**SL9020   Data Controller                                      <Jan90...
**SL9025   Address Controller                                   <Jan90...
**SL9030   Integrated Peripheral Controller                     <Jan90...
**SL9090/A Universal PC/AT Clock Chip                           <oct88...
**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
***Notes:...
***Info:...
***Configurations:...
***Features:
o   AGP / PCI / ISA Mobile and Deep Green PC Ready
    - Supports 3.3V and sub-3.3V interface to CPU
    - Supports separately powered 3.3V (5V tolerant) interface to 
      system memory, AGP, and PCI bus
    - PC-97 compatible using VIA VT82C586B (208-pin PQFP) south bridge 
      chip with ACPI Power Management for cost-efficient desktop 
      applications
    - Modular power management and clock control for mobile system 
      applications
    - Combine with VIA VT82C596 (Intel PIIX4 pin compatible 324-pin 
      BGA) "Mobile South" south bridge chip for state-of-the-art 
      mobile applications
o   High Integration
    - Single chip implementation for 64-bit Socket-7-CPU, 64-bit 
      system memory, 32-bit PCI and 32-bit AGP interfaces
    - Apollo MVP3  Chipset: VT82C598MVP system controller and 
      VT82C586B PCI to ISA bridge
    - Chipset includes UltraDMA-33 EIDE, USB, and Keyboard / PS2-Mouse 
      Interfaces plus RTC / CMOS on chip
o   High Performance CPU Interface
    - Supports all Socket-7 processors including 64-bit Intel Pentium/ 
      Pentium with MMX, AMD 6k86 (K6), Cyrix/IBM 6x86 / 6x86MX, and 
      IDT/Centaur C6 CPUs
    - 66 / 75 / 83 / 100 MHz CPU external bus speed (internal 300MHz 
      and above)
    - Built-in deskew DLL (Delay Lock Loop) circuitry for optimal skew 
      control within and between clocking regions
    - Cyrix/IBM 6x86 linear burst support
    - AMD 6k86 write allocation support
    - System management interrupt, memory remap and STPCLK mechanism
o   Advanced Cache Controller
    - Direct map write back or write through secondary cache
    - Pipelined burst synchronous SRAM (PBSRAM) cache support
    - Flexible cache size:  0K / 256K / 512K / 1M / 2MB
    - 32 byte line size to match the primary cache
    - Integrated 8-bit tag comparator
    - 3-1-1-1-1-1-1-1 back to back read timing for PBSRAM access up to 
      100 MHz
    - Tag timing optimized (less than 4ns setup time) to allow 
      external tag SRAM implementation for most flexible cache 
      organization
    - Sustained 3 cycle write access for PBSRAM access or CPU to 
      DRAM & PCI bus post write buffers up to 100 MHz
    - Supports CPU single read cycle L2 allocation
    - System and video BIOS cacheable and write-protect
    - Programmable cacheable region
o   Full Featured Accelerated Graphics Port (AGP) Controller
    - Synchronous and pseudo-synchronous with the host CPU bus with 
      optimal skew control
        PCI    AGP    CPU     DRAM    Mode
        33MHz  66MHz  100MHz  100MHz  3x synchronous          *1
        33MHz  66MHz  83MHz   83MHz   2.5x pseudo-synchronous *1
        30MHz  60MHz  75MHz   75MHz   2.5x pseudo-synchronous *1
        33MHz  66MHz  66MHz   66MHz   2x synchronous          *1
        33MHz  66MHz  100MHz  66MHz   3x synchronous          *2
        33MHz  66MHz  83MHz   66MHz   2.5x pseudo-synchronous *2
        30MHz  60MHz  75MHz   66MHz   2.5x pseudo-synchronous *2
        33MHz  66MHz  66MHz   66MHz   2x synchronous          *2
        *1 DRAM uses CPU clock, *2 DRAM uses AGP clock
    - AGP v2.0 compliant (1x and 2x transfer modes)
    - Supports SideBand Addressing (SBA) mode (non-multiplexed 
      address/data)
    - Supports 133MHz 2X mode for AD and SBA signalling
    - Pipelined split-transaction long-burst transfers up to 533 MB/
      sec
    - Eight level read request queue
    - Four level posted-write request queue
    - Thirty-two level (quadwords) read data FIFO (128 bytes)
    - Sixteen level (quadwords) write data FIFO (64 bytes)
    - Intelligent request reordering for maximum AGP bus utilization
    - Supports Flush/Fence commands
    - Graphics Address Relocation Table (GART)
    - One level TLB structure
    - Sixteen entry fully associative page table
    - LRU replacement scheme
    - Independent GART lookup control for host / AGP / PCI master 
      accesses
    - Windows 95 OSR-2 VXD and integrated Windows 98 / NT5 miniport 
      driver support
o   Concurrent PCI Bus Controller
    - PCI buses are synchronous / pseudo-synchronous to host CPU bus
    - 33 MHz operation on the primary PCI bus
    - 66 MHz PCI operation on the AGP bus
    - PCI-to-PCI bridge configuration on the 66MHz PCI bus
    - Supports up to five PCI masters
    - Peer concurrency
    - Concurrent multiple PCI master transactions;  i.e., allow PCI 
      masters from both PCI buses active at the same time
    - Zero wait state PCI master and slave burst transfer rate
    - PCI to system memory data streaming up to 132Mbyte/sec
    - PCI master snoop ahead and snoop filtering
    - Six 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
    - Enhanced PCI command optimization (MRL, MRM, MWI, etc.)
    - Forty-eight 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
    - Supports L1/L2 write-back forward to PCI master read to minimize 
      PCI read latency
    - Supports L1/L2 write-back merged with PCI master post-write to 
      minimize DRAM utilization
    - Delay transaction from PCI master reading DRAM
    - Read caching for PCI master reading DRAM
    - Transaction timer for fair arbitration between PCI masters 
      (granularity of two PCI clocks)
    - Symmetric arbitration between Host/PCI bus for optimized system 
      performance
    - Complete steerable PCI interrupts
    - PCI-2.1 compliant, 32 bit 3.3V PCI interface with 5V tolerant 
      inputs 
o   Advanced High-Performance DRAM Controller
    - DRAM interface synchronous with host CPU (66/75/83/100 MHz) or 
      AGP (66MHz) for most flexible configuration
    - Concurrent CPU and AGP access
    - FP, EDO, and SDRAM
    - 66MHz and 100MHz (PC100) SDRAM support
    - Different DRAM types may be used in mixed combinations
    - Different DRAM timing for each bank
    - Dynamic Clock Enable (CKE) control for SDRAM power reduction in 
      mobile and desktop systems
    - Mixed 1M / 2M / 4M / 8M / 16MxN DRAMs
    - 6 banks up to 768MB DRAMs
    - Flexible row and column addresses
    - 64-bit data width only
    - 3.3V DRAM interface with 5V-tolerant inputs
    - Programmable I/O drive capability for MA, command, and MD signals
    - Optional bank-by-bank ECC (single-bit error correction and 
      multi-bit error detection) or EC (error checking only) for DRAM 
      integrity
    - Two-bank interleaving for 16Mbit SDRAM support
    - Two-bank and four bank interleaving for 64Mbit SDRAM support
    - Supports maximum 8-bank interleave (i.e., 8 pages open simultan-
      eously);  banks are allocated based on LRU
    - Seamless DRAM command scheduling for maximum DRAM bus utilization
      (e.g., precharge other banks while accessing the current bank)
    - Four cache lines (16 quadwords) of CPU/cache to DRAM write 
      buffers
    - Four quadwords of CPU/cache to DRAM read prefetch buffers
    - Concurrent DRAM writeback
    - Read around write capability for non-stalled CPU read
    - Burst read and write operation
    - 5-2-2-2-2-2-2-2 back-to-back accesses for EDO DRAM
    - 6-1-1-1-2-1-1-1 back-to-back accesses for SDRAM
    - BIOS shadow at 16KB increment
    - Decoupled and burst DRAM refresh with staggered RAS timing
    - Programmable refresh rate and refresh on populated banks only
    - CAS before RAS or self refresh
o   Mobile System Support
    - Independent clock stop controls for CPU / SDRAM, AGP, and PCI 
      bus
    - PCI and AGP bus clock run and clock generator control
    - VTT suspend power plane preserves memory data
    - Suspend-to-DRAM and Self-Refresh operation
    - New VIA BGA VT82C596 “Mobile South” south bridge chip available 
      soon for support of new mobile features
    - Dynamic clock gating for internal functional blocks for power 
      reduction during normal operation
    - Low-leakage I/O pads
o   Built-in NAND-tree pin scan test capability
o   3.3V, 0.35um, high speed / low power CMOS process
o   35 x 35 mm, 476 pin BGA Package

**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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