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**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...
*Headland/G2...
*HMC (Hulon Microelectronics)...
*Logicstar...
**SL6012  Memory Mapper for PC-AT (74LS612 compatible)          <Jul87
***Info:
The SL6012 Memory  Mapper is intended for use in  PC-AT design. It can
expand an address bus by 4  bits. In PC-AT applications, 4 bits of the
source  address   are  used  to  select   1  of  16,   eight  bit  map
registers. These registers  are normally programmed (through software)
with the  starting address of each  memory page. The  register data is
output directly for  use as the most significant  bits of the expanded
address bus. The 8 bits from the SL6012 are used along with the unused
source address bits to form the expanded address bus.

As shown  in Table 1  [see datasheet], the  SL6012 has three  modes of
operation; read, write and map. Data may be written into, or read from
the Memory  Mapper when  chip select CSN  is low. The  register select
inputs (RS0 through RS3) select one of the sixteen map registers. When
RWN is  low, data is written  into a register from  the data bus. When
RWN is high  data is output from a Memory Mapper  register to the data
bus.

The map mode of operation is selected when chip select CSN is high. In
this mode, the  register data selected by the  map address inputs (MA0
through  MA3)  will be  available  on  the  map outputs  (MO0  through
MO7).  Note that  the map  registers are  addressed by  either  the RS
inputs or  the MA inputs depending  upon the operating  mode. When MEN
(Map Enable) is low the map  outputs (MO0-MO7) are active. When MEN is
high, the map outputs are at high impedance.

***Versions:...
***Features:...
**SL9010  System Controller (80286/80386SX/DX, 16/20/25MHz)     <oct88...
**SL9020  Data Controller                                       <oct88...
**SL9025  Address Controller                                    <oct88...
**SL9090  Universal PC/AT Clock Chip                            <oct88...
**SL9250  Page Mode Memory Controller (16/20MHz 8MB Max)        <oct88...
**SL9350  Page Mode Memory Controller (16/20/25MHz 16MB Max)    <oct88...
**Other:...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
**VL82C521/522     Lynx/M                                            ?
***Info:...
***Configurations:...
***Features:
o   Support for Pentium and Pentium-class CPUs
o   64-bit wide SDRAM, EDO, and FPM DRAM controller
o   Nine-deep, 64-bit fast-access smart write buffers
o   Fully PCI 2.1 compliant, 33MHz, synchronous or asynchronous, high
    performance (120 MB/s) PCI bus with full concurrency to support 
    high bandwidth multi-media
o   Flexible L2 write-back cache controller supporting 3-1-1-1-1-1-1-1
    burst cycles
o   Highly integrated chipset in low-profile BGA packages
o   Active thermal feedback (ATF) for closed-loop thermal control of 
    the CPU
o   PCI bridge support for high-performance primary PCI hot docking
o   Common Architecture Serial Bus minimizes docking connector pin 
    count
o   SMB/I2C system management bus improves battery monitoring
o   Singular ROM for keyboard, System and graphics BIOS
o   Full 2 channel Bus Mastering IDE controller
o   Integrated '077 FDC
o   Two 16550 UARTs
o   8052 keyboard controller with built-in scan for matrix keyboards and
    boot controller functionality
o   system clocks from power-managed PLLs with on-board buffering for
    distribution
o   Two PWMs to provide LCD backlight and contrast control
o   Parallel port with PS2, EPP and ECP extensions
o   Built-in IrDA 1.1 Fast Infrared communications port
o   Multiple VCC rails and on-board level shifters to provide inder-
    pendent power-down and true 5.0 Vdc peripheral support
o   Support for three PS2 ports
o   Real-Time Clock with CMOS
o   25 GPIO pins with expansion
o   Built-in Sub-ISA bus for 16-bit DMA ISA Master audio device
o   Supports 3.3V and 0V suspend with multiple resume events, I/O
    trapping, and audio 0V suspend/resume
o   Bus Keeper I/Os to reduce battery drain in suspend mode
o   Supports shut-down option for CPU core power during powered
    suspend to maximize battery life
o   Supports CPU clock division emulation to effectively reduce CPU
    clock frequency
o   Plug-N-Play support
o   Compliant with Microsoft recommendations for Win '95

**VL82C530         Eagle Ð                                         c95...
**VL82C541/543     Lynx                                            c95...
**VL82C591/593     SuperCore 590                                   c94...
**VL82C594/596/597 Wildcat                                         c95...
**I/O Chips:
**VL82C106 Combination I/O chip                                      ?...
**VL82C107 SCAMP  Combination I/O chip                               ?...
**VL82C108 TOPCAT Combination I/O chip                               ?...
**VL82C110 Combination I/O chip                                      ?...
**VL82C113 SCAMP  Combination I/O chip                               ?...
**VL82C114 Combination I/O chip                                      ?...
**Video: ...
**Disk:...
**Modems:...
**Other:...
**Not sure if they actually exist...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...

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