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**82497/492   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94
***Notes:...
***Info:...
***Configurations:...
***Features:...
**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)...
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*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
**530/5595       (Sinbad) Host, PCI, 3D Graphics & Mem. Ctrl.<11/10/98
***Info:
The P5  A.G.P./VGA chipset, SiS530/5595, provides  a high performance/
cost index  Desktop/Mobile solution  for the Intel  Pentium P54C/P55C,
AMD K5/K6/K6-II, Cyrix M1/M2 and  other compatible Pentium CPU with 3D
A.G.P. VGA system.

The Host,  PCI, 3D A.G.P.  Video/Graphics & Memory  Controller, SiS530
integrates the  Host- to-PCI bridge,  the PCI interface, the  L2 cache
controller, the  DRAM controller, the high  performance hardware 2D/3D
VGA controller, and the PCI IDE controller.

The   Host  interface   supports   Synchronous/Asynchronous  Host/DRAM
clocking configuration to eminently improve the system performance and
DRAM compatibility issues.

The L2 cache controller can support up to 2 MB P.B. SRAM, and the DRAM
controller  can support  SDRAM  memory  up to  1.5  GBytes with  three
double-sided  SDRAM  DIMMs  configuration.  The cacheable  DRAM  sizes
support up to 256 MBytes.

The built-in fast PCI IDE controller supports the ATA PIO/DMA, and the
Ultra DMA33/66 function  that support the data transfer  rate up to 66
MB/s. It provides the separate data path for two IDE channels that can
eminently improve the performance under the multi-tasking environment.

The A.G.P. internal  interface is supported for integrated  H/W 3D VGA
controller. The  integrated VGA controller  is a high  performance and
targeted at  3D graphics application.  In addition,  the integrated 3D
Video/Graphics controller adopts the  64bits 100MHz host bus interface
high  technology  to  improve  the performance  eminently.   To  cost-
effective the PC system, the  share system memory architecture will be
adopted and  it can flexibly using  the 2MB, 4MB and  8MB frame buffer
size  from programming  the system  BIOS. [something  got  confused in
translation  there  didn't it?]  To  enhance  the system  performance,
SiS530 also supports the local  frame buffer solution and memory sizes
can support up to 8MB with SDRAM and SGRAM.

In addition  to provide  the standard interface  for CRT  monitors, it
also  provides  the Digital  Flat  Panel  Port  (DFP) for  a  standard
interface  between  a  personal  computer  and a  digital  flat  panel
monitor. This  port allows a host  computer to connect  directly to an
external  flat panel  monitor without  the need  for analog-to-digital
conversion  found  in most  flat  panel  monitors  today. As  for  DVD
solution,  the  integrated 3D  VGA  controller  also  support DVD  H/W
accelerator to improve the DVD playback performance.

The SiS5595 PCI  system I/O integrates the PCI-to-ISA  bridge with the
DDMA, PC/PCI DMA  and Serial IRQ capability, the  ACPI/Legacy PMU, the
Data  Acquisition   Interface,  the  Universal   Serial  Bus  host/hub
interface,  and the  ISA  bus  interface which  contains  the ISA  bus
controller, the DMA controllers, the interrupt controllers, the Timers
and  the  Real Time  Clock  (RTC).  It  also integrates  the  Keyboard
Controller and PS/2 mouse interface that can support keyboard power on
function  for users  to power  on system  by entering  the hot  key or
password from  keyboard. The built-in  USB controller, which  is fully
compliant to  OHCI (Open Host Controller Interface),  provides two USB
ports  capable  of  running  full/low  speed USB  devices.   The  Data
Acquisition Interface  offers the ability of  monitoring and reporting
the environmental  condition of  the PC. It  could monitor  5 positive
analog voltage inputs, 2 Fan speed inputs, and one temperature input.

In  addition, SiS5595  also supports  ACPI function  to  meet Advanced
Configuration and Power Interface (ACPI) 1.0 specification for Windows
98 environment,  it can support power-management  timer, Power button,
Real-time  clock alarm  wake up,  more  sleeping state,  ACPI LED  for
sleeping and  working state, LAN wake  up, Modem Ring In  wake up, and
OnNow initiative function.

***Configurations:...
***Features:...
**540            (Spartan) Super7 2D/3D Ultra-AGP Single C.S.<11/30/99...
**55x            SoC (System-on-chip)                        <03/14/02...
**
**Support chips:
**85C206     Integrated Peripheral Controller [no datasheet]         ?...
**5595       Pentium PCI System I/O                          <12/24/97...
**950        LPC I/O                                         <07/16/99...
**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
**VT8501       Apollo MVP4,Single-Chip 66-100MHz & AGP       <11/04/98
***Notes:...
***info:
The  Apollo MVP4  is  a PC  Socket-7  system logic  North Bridge  with
integrated 2D  / 3D Graphics  accelerator.  The core logic  portion of
the chip is  based on the popular 100MHz VIA  Apollo MVP3 chipset with
enhanced features  and graphics accelerator based  on the Cyber9398DVD
from Trident  Microsystems, Inc.  The  combination of the  two leading
edge  technologies   provides  a  stable,   cost-effective,  and  high
performance solution for personal computers, embedded systems, set-top
boxes and  others.  As  shown in Figure  1 [see datasheet]  below, the
Apollo MVP4 will interface to:

o Socket 7 CPU (66 – 100 MHz)
o L2 Cache RAM & Tag
o SDRAM Memory Interface
o PCI Bus (30 - 33 MHz)
o Analog RGB Monitor with DDC
o DFP / Digital Monitor Interface (TMDS)
o Video Capture / Playback CODECs

Apollo MVP4 Core Logic Overview
The Apollo  MVP4 –  System Media Accelerated  North Bridge (SMA)  is a
high performance, cost-effective and energy efficient solution for the
implementation  of Integrated  2D/3D  Graphics -  PCI  - ISA  personal
computer  systems from  66 MHz  to 100  MHz based  on  64-bit Socket-7
(Intel Pentium and Pentium MMX; AMD K6 and K6-2; Cyrix / National 6x86
/ 6x86MX, IDT / Centaur C6/WinChip), and Rise MP6 processors.

The Apollo  MVP4 controller provides superior  performance between the
integrated  2D/3D Graphics  Engine, CPU,  optional  synchronous cache,
DRAM,  and PCI bus  with pipelined,  burst, and  concurrent operation.
For  L2-Cache  solutions  using  pipelined  burst  synchronous  SRAMs,
3-1-1-1-1-1-1-1  timing  can  be  achieved  for both  read  and  write
transactions at 100 MHz.  Tag timing is specially optimized internally
(less  than 4 nsec  setup time)  to allow  implementation of  L2 cache
using an external tag for t  he most flexible cache organization (0K /
256K / 512K / 1M /  2M).  Four cache lines (16 quadwords) of CPU/cache
to  DRAM  write  buffers  with concurrent  write-back  capability  are
included on chip to speed up cache read and write miss cycles.

The Apollo  MVP4 supports six  banks of DRAMs  up to 768MB.   The DRAM
controller  supports  standard Fast  Page  Mode  (FP) DRAM,  EDO-DRAM,
Synchronous DRAM  (SDRAM), and Virtual  Channel Synchronous DRAM  in a
flexible mix  / match manner.   The Synchronous DRAM  interface allows
zero wait state bursting between the  DRAM and the data buffers at 100
MHz.  The six banks of DRAM can be composed of an arbitrary mixture of
1M / 2M  / 4M / 8M  / 16MxN DRAMs.  The DRAM  controller also supports
optional ECC (single-bit error  correction and multi-bit detection) or
EC (error checking) capability separately selectable on a bank-by-bank
basis.   The  DRAM Controller  can  run at  either  the  host CPU  bus
frequency (66  / 100 MHz) or  at the PC100 memory  frequency (100 MHz)
with  built-in deskew  PLL  timing control.   With  the advanced  DRAM
controller,  the  Apollo  MVP4   allows  implementation  of  the  most
flexible, reliable, and high-performance DRAM interface.

The  Apollo MVP4  also  supports  full AGP  v2.0  capability with  the
internal 2D/3D Graphics Engine for maximum software compatibility.  An
eight level request  queue plus a four level  post-write request queue
with thirty-two  and sixteen quadwords  of read and write  data FIFO’s
respectively   are  included   for  deep   pipelined  and   split  AGP
transactions.   A  single-level  GART  TLB with  16  full  associative
entries and  flexible CPU/AGP/PCI  remapping control is  also provided
for  operation  under  protected  mode operating  environments.   Both
Windows-95 VXD and Windows-98 / NT5 miniport drivers are supported.

The Apollo MVP4 supports one 32-bit  3.3 / 5V system bus (PCI) that is
synchronous  /  pseudo-synchronous to  the  CPU  bus.   The chip  also
contains a built-in AGP bus  -to- PCI bus bridge to allow simultaneous
concurrent  operations  on each  bus.   Five  levels (doublewords)  of
posted write buffers are included  to allow for concurrent CPU and PCI
operation.  For PCI master operation, forty-eight levels (doublewords)
of posted  write buffers and sixteen levels  (doublewords) of prefetch
buffers are  included for concurrent PCI bus  and DRAM/cache accesses.
The   chip  also   supports  enhanced   PCI  bus   commands   such  as
Memory-Read-Line,   Memory-Read-Multiple,   and   Memory-Write-Invalid
commands to  minimize snoop overhead.  In  addition, advanced features
are  supported such  as snoop  ahead, snoop  filtering,  L1 write-back
forward to  PCI master, and L1  write-back merged with  PCI post write
buffers  to minimize  PCI master  read latency  and  DRAM utilization.
Delayed transaction  and read caching mechanisms  are also implemented
for further improvement of overall system performance.

The Apollo MVP4 provides independent  clock stop control for the CPU /
SDRAM, PCI, and AGP buses and Dynamic CKE control for powering down of
the SDRAM.  A separate suspend-well plane is implemented for the SDRAM
control  signals  for  Suspend-to-DRAM  operation.  Coupled  with  the
324-pin Ball Grid Array VIA VT82C596B south bridge chip, a complete PC
main board can be implemented with no external TTLs.

The Apollo MVP4 controller  coupled with VIA’s highly integrated south
bridge,  the   VT82C686A,  is  ideal  for   high  performance,  energy
efficient,  and  highly integrated  computer  systems.  The  VT82C686A
supports a PCI-to-ISA bus  controller, four USB ports, dual bus-master
IDE  with UltraDMA33/66,  AC97  basic digital  audio, system  hardware
monitoring, and integrated "Super-I/O" functionality.
***Configurations:...
***Features:...
**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...
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*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...

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