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**82430HX     PCIset (Pentium) HX (Triton II) (82439HX)       02/12/96
***Notes:...
***Info:...
***Configurations:...
***Features:
o   Supports All 3V Pentium Processors
o   Dual Processor Support
o   PCI 2.1 Compliant
o   Integrated Second-Level Cache Controller
    - Direct Mapped Organization
    - Write-Back Cache Policy
    - Cacheless, 256 KB, and 512 KB
    - Pipelined Burst SRAMs
    - Cache Hit Read/Write Cycle Timings at 3-1-1-1
    - Back-to-Back Read Cycles at 3-1-1-1-1-1-1-1
    - Integrated Tag/Valid Status Bits for Cost Savings and 
      Performance
    - Optional 512-MB DRAM Cacheability Limit
    - Supports 5V SRAMs for Tag Address
o   Integrated DRAM controller
    - 4-MB to 512-MB Main Memory
    - 64-Mb DRAM Technology Support
    - 8-QWord Deep Merging DRAM Write Buffer 
    - Enhanced EDO/Hyper Page Mode DRAM; 4-2-2-2 Beads and x-2-2-2 
      Writes at 60 MHz; 5-2-2-2 Reads and x-2-2-2 Writes at 66 MHz
    - 8 RAS Lines
    - Integrated Programmable-Strength Memory Address Butters
    - CAS-Before-RAS Refresh
o   Optional Parity
o   Single 324-Pin BGA Package
o   Optional Error Checking and Correction (ECC)
    - Superior DRAM Data integrity
    - Single Bit Error Correction, Multi-Bit Error Detection plus 
      Nibble 
      Failure Detection ECC Code
    - Single and Multi-Bit Error Reporting
    - Virtual Swapable Bank Support (i.e., can swap out problem banks)
    - Merging Write Buffer Eliminates Most Partial Writes Cycles
o   Fully Synchronous, Minimum Latency 25/30/33 MHz PCI Bus interface
    - Zero Wait State CPU-to-PCI Write Timings (no IRDY stall) for 
      Superior Graphics Performance
    - Enhanced CPU-to-PCI Read Latencies for Superior Graphics/PIO 
      Performance
    - 21-DWord PCI-DRAM Post Buffer
    - 22-DWord PCI-to-DRAM Read Prefetch Buffer
    - Write-Back Merging for PCI to DRAM Writes
    - Write-Back Forwarding for PCI to DRAM Reads
    - Pipelined Snoop Ahead
    - Multi-Transaction Timer to Support
    - Multiple Short PCI Transactions Within the Same PCI Arbitration 
      Cycle
o   Supports the Universal Serial Bus (USB)
o   Supported Kits
    - 82439HX ISA Kit (Txc, PIIX3)
    - 82439HX ISA/DP Kit (TXC, PIIX3, IOAPIC)

**82430VX     PCIset (Pentium) VX (Triton II) (82437VX/82438) 02/12/96...
**82430TX     PCIset (Pentium) TX (Triton II) (82439TX)       02/17/97...
**82450KX/GX  PCIset (Pentium Pro) KX/GX (Mars/Orion)         11/01/95...
**
**Support Chips:
**82091AA     Advanced Interface Peripheral (AIP)                  c93...
**8289        Bus Arbiter (808x)                                   c79...
**82289       Bus Arbiter for iAPX 286 Processor Family            c83...
**82258       Advanced Direct Memory Access Coprocessor(ADMA) 01/01/84...
**82335       High-Integration Interface Device For 386SX      c:Nov88...
**82360SL     I/O Subsystem                                   10/05/90...
**82370       Integrated System Peripheral (for 82376)         c:Oct88...
**82371FB/SB  PCI ISA IDE Xcelerator 82371FB/82371SB (PIIX/3) 01/31/95...
**82371MX     Mobile PCI I/O IDE Xcelerator (MPIIX)           11/01/95...
**82371AB     PCI-TO-ISA / IDE Xcelerator 82371AB (PIIX4)     02/17/97...
**82374/82375 PCI-EISA Bridge (82374EB/82375EB, 374SB/375SB)   c:Mar93...
**82378       System I/O (SIO) (82378IB and 82378ZB)           c:Mar93...
**82379AB     System I/O-APIC (SIO.A)                           <Dec94...
**82380       32-bit DMA Controller w/ Integrated Peripherals 02/01/87...
**82380FB/AB  PCIset: 82380FB Mobile PCI-to-PCI Bridge(MPCI2) 02/17/97...
**82384       Clock Generator and Reset Interface                  c86...
**82385       32-bit Cache Controller for 80386               09/29/87...
**82385SX     32-bit Cache Controller for 80386SX             01/25/89...
**82395DX     High Performance Smart Cache                    06/18/90...
**82395SX     Smart Cache                                     12/17/90...
**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
***Notes:...
***Info:...
***Features:...
**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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*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
**SL82C465    Cache Controller (for 486/386DX/SX)                 c:91
***Info:
The SL82C465 cache controller supports both 1X and 2X clock modes. The
1X clock  mode means that the CCLK2  signal is used as  the CPU clock;
the 2X clock  mode means that the PCLK signal  (half the frequency and
the phase indicator  of CCLK2) is used as the  CPU clock. The SL82C465
and other CPU local bus devices run at the same clock frequency as the
CPU, while  the rest of the system  runs at the frequency  of PCLK. In
other words, the operating frequency of the system logic is either the
same (2X clock mode) or half the speed of the CPU (1X clock mode). For
the 1X clock mode, the timing of the signals between the CPU/Cache and
the system logic interface  is converted by the SL82C465 automatically
to  satisfy  the requirement  of  individual  clocks.  Table 1-1  [see
datasheet] lists  the operating frequencies  of the CPU local  bus and
the system logic with the oscillator used.

The 2X  clock mode is recommended  for a CPU frequency  no faster than
33Mhz because the system logic  is available at the targeted speed and
the  performance  is  slightly  better  than if  1X  clock  mode  were
used. For  a CPU  frequency faster  than 33Mhz, the  1X clock  mode is
preferred  for  486  systems  because  it  becomes  increasingly  more
difficult to  build a reliable  system with an oscillator  faster than
66Mhz.

***Versions:...
***Features:...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
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*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...

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