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***Info & Features:
M1561 Overview

128-bit Super-Socket7  North Bridge for AMD-K6-III  with integrated 3D
and Video Highest-performance game playing in a single integrated chip

The M1561 integrates the following functionalities in a Unified Memory
Architecture PC:

o   3-D Graphics
o   2-D Windows Acceleration
o   VGA Display Controller
o   SDRAM Memory Controller
o   PCI Bus Interface

M1561  supports the  66/100/1XX MHz  Socket 7  Front Side  Bus.  It is
System Memory  Management (SMM)  and Advanced Configuration  and Power
Interface Specification (ACPI) compliant.

M1561 uses  66/100/1XX MHz SDRAM with LVTLL  input/output signals. The
chip supports up to four memory DIMMs.

Power supplies are 2.5V  for the core and 3.3V for most  of the I/O. A
5V  reference is  needed for  the  5V tolerant  PCI inputs.  Reference
voltages for ArtX and ArtX+ are  also needed.The part is packaged in a
35x35mm 492 ball Thermally Enhanced Ball Grid Array (T 2 BGA) package.

North Bridge Features
o   128-bit Data Streaming architecture for highest performance 
    SMA/UMA
o   PC99 compliant
o   100/66MHz CPU Front Side Bus, 1XXMHz ready
o   Standard PC-100/66 SDRAM (up to 1 GB) PC-1XX ready
o   33 MHz PCI 2.2 compliant I/O bus
o   ACPI power management
o   Compatible with single-chip ALi M1535D and M1543 South Bridges

Performance 3D Graphics by ArtX

o   First integrated North Bridge with hardware-accelerated geometry 
    transformation & lighting (T&L)
o   Setup engine
o   Delivers fastest real game performance
o   Revolutionary new parallel rendering architecture for state-of-
    the-art pixel fill rates
o   Industry-leading 8X Virtual AGPTM graphics performance and 
    functionality
o   Hardware features:
    - Accelerated floating point Geometry and texture coordinate
      transformation, clipping, perspective projection
    - Accelerated specular, diffuse, and ambient lighting
    - 3D points, lines, triangles, polygons
    - Perspective-correct trilinear-filtered MIP-mapped texture 
      mapping
    - Alpha blending
    - Exponential pixel fog
    - Depth, stencil buffering
    - Anti-aliasing
    - Framebuffer clear and copy

2D/Multimedia Features
o   30fps DVD playback with hardware acceleration (motion 
    compensation)
o   128-bit BitBLT engine, 256 raster operations
o   Full color RGBA, color expansion, color keying
o   YUV planar 4:2:0, 4:2:2 video overlay, video scaling and filtering

Display Controller
o   Up to 1600x1200 non-interlaced screen resolution
o   Hardware features:
    - Analog CRT monitor output
    - 32-bit full-color
    - Fully compliant VGA adapter
    - Downloadable RAMDAC, hardware cursor
o   VBE 3.0 support

Memory interface
o   128-bit PC100/PC66 SDRAM, PC-1XX Ready
o   Up to 2.1 Gbytes/second bandwidth

Drivers
o   Optimized driver for DirectX 7 with Direct3D, OpenGL ICD, HWMC 
o   and GDI acceleration on Windows 98 and Windows 2000
o   Dynamic memory allocation for texture
o   Drivers available for Windows 98, Windows 2000 and Windows NT 4.0

Packaging
o   492-BGA, 35x35mm

***Configurations:...
**M6117          386SX Single Chip PC                              <97...
**
**Support Chips:
**M1535/D        South Bridge                                        ?...
**
**May not exist:...
**Later Chipsets:...
**Other:...
*AMD . . . . . . . [no datasheets, some info]...
*Chips & Technologies...
*Contaq  . . . . . [no datasheets, some info]...
*Efar Microsystems [no datasheets, some info]...
*ETEQ...
***Notes:
See VIA for details. The following mapping is according to:
http://www.plasma-online.com/english/identify/picture/eteq.html

ETEQ 6618:
EQ82C6618 = VIA Apollo VPX: VT82C585VPX System Controller
EQ82C6617 = VIA Apollo VPX: VT82C587VP  Data Buffer

There is a requirement for 2x EQ82C6617 Data Buffers.

ETEQ 6628:
EQ82C6628 = VIA Apollo VP3: VT82C597 System Controller

ETEQ 6638:
EQ82C6638 = VIA Apollo MVP3: VT8501 System Controller
EQ82C6629 = AGP Bridge? no idea sorry.

All  these  chipsets are  associated  with  SOYO  motherboards. It  is
unknown if they appear on other motherboards.

*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel
**IBM PC/XT/AT Chip Sets...
**82230/82231 High Integration AT-Compatible Chip Set(ZyMOS)   c:Aug88...
**82310       Micro Channel Compatible Peripheral Chip Set    04/21/88...
**82311       High Integration MCA Compatible Perip. Chip Set 11/14/88...
**82320       MCA compatible Chipset           [no datasheet] 04/10/89...
**82340DX     Chip Set (VLSI) (82346/82345/82355)             01/08/90...
**82340SX     Chip Set (VLSI) (82343/82344)                   01/25/89...
**82350       EISA Chip Set                                   07/10/89...
**82350DT     EISA Chip Set                                   04/22/91...
***Configurations:

82350 Mode:
-----------
82358DT EISA Bus Controller
82357   Integrated System Peripheral (ISP)
82352DT EISA Bus Buffers (EBB) (Optional 0-3)
	82352DT As Data Swap Buffer
	82352DT As Address Buffer
	82352DT As Data Parity Buffer

The 82350DT can directly replace the 82350 in this configuration.

82350DT Enhanced system Mode:
-----------------------------
82358DT EISA Bus Controller
82359   DRAM Controller
82357   Integrated System Peripheral (ISP)
82352DT EISA Bus Buffers (EBB) (As Address Buffer)
82353   Advanced Data Path Device (2x)
82351   Local I/O EISA Support Peripheral (LIOE)

82350DT Buffered system Mode:
-----------------------------
82358DT EISA Bus Controller
82359   DRAM Controller
82357   Integrated System Peripheral (ISP)
82352DT EISA Bus Buffers (EBB) 
	82352DT As Address Buffer
	82352DT As Data Buffer
82353   Advanced Data Path Device (2x)
82351   Local I/O EISA Support Peripheral (LIOE)

ALL:
----
+Optional 82385 or 82395 Cache Controller on 386 systems.

+Optional 82355  Bus Master Interface Controller  (BMIC) (intended for
 interface cards).

***Features:...
**82420TX/ZX  PCIset (for 486) TX (Saturn), ZX (Saturn II)     c:Nov92...
**82420EX     PCIset (for 486) EX (Aries)   (82425EX/82426EX)   <Dec94...
**82430LX     PCIset (Pentium) LX (Mercury) (82433LX/82434LX) 03/22/93...
**82430NX     PCIset (Pentium) NX (Neptune) (82433NX/82434NX)    Mar94...
**82430FX     PCIset (Pentium) FX (Triton I) (82437FX/82438FX)01/31/95...
**82430MX     PCIset (Pentium) MX (Mobile Triton)(82437/438MX)11/01/95...
**82430HX     PCIset (Pentium) HX (Triton II) (82439HX)       02/12/96...
**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...
**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...
**Notes:...
**GC101/102     12/16MHz PC/AT Compatible Chip Set             c:Feb88...
**GC101/102/103 12/16MHz PC/AT Compatible Chip Set + EMS 4.0   c:Jul89...
**GCK113        80386 AT Compatible Chip Set                   c:oct89...
**GCK181        Universal PS/2 Chip Set                        c:Mar89...
**HT11          Single 286 AT Chip [no datasheet]               <Aug90...
**HT12/+/A      Single 286 AT Chip with EMS support            c:Aug90...
**HT18          80386SX Single Chip                            c:Sep91...
**HT21          386SX/286 Single Chip (20 MHz)                 c:Aug91...
**HT22          386SX/286 Single Chip (25 MHz)                 c:Sep91...
**HT25          3-volt Core Logic for 386SX                    c:Dec92...
**HT35          Single-Chip Peripheral Controller [partial info]     ?...
**HTK320        386DX Chip Set                                 c:Sep91...
**HTK340        "Shasta" 486 Chip Set                          c:Jun92...
**Support Chips:
**HT44          Secondary Cache                                c:Jun92...
**Other:...
*HMC (Hulon Microelectronics)...
**HMC82C206 Integrated Peripherals Controller (10MHz C&T 82c206)     ?...
*Logicstar...
**SL600X  PC / AT Compatible Chipset (10/12MHz)                 <Jul87...
**Support Chips:
**SL6012  Memory Mapper for PC-AT (74LS612 compatible)          <Jul87...
**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
***Info:...
***Versions:...
***Features:...
**SL9350  Page Mode Memory Controller (16/20/25MHz 16MB Max)    <oct88...
**Other:...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
***Features:
o   Supports Intel/AMD/Cyrix/IDT Pentium CPU Host Bus at 
    66/75/83/95/100 MHz and 2.5/3.3V Bus Interface
    − Supports the Pipelined Address of Pentium compatible CPU
    − Supports the Linear Address Mode of Cyrix CPU
    − 100/100, 95/95, 83/83, 75/75 and 66/66 MHz Synchronous 
      Host/DRAM clocking configuration
    − 100/75, 95/75, 83/66, 66/100 and 66/83 MHz Asynchronous 
      Host/DRAM clocking configuration
    − Supports Host Bus operation for integrated 3D VGA Controller
o   Meets PC99 Requirements
o   Supports PCI Revision 2.2 Specification
o   Integrated Super AGP VGA for Hardware 2D/3D Video/Graphics 
    Accelerators
    − Supports tightly coupled 64 bits 100MHz host interface to VGA 
      to speed up GUI performance and the video playback frame rate
    − Built-in programmable 24-bit true-color RAMDAC up to 230 MHz 
      pixel clock
    − Built-in reference voltage generator and monitor sense circuit
    − Supports loadable RAMDAC for gamma correction in high color 
      and true color modes
    − Built-in dual-clock generator
    − Supports Multiple Adapters and Multiple Monitors
    − Built-in PCI multimedia interface
    − Flexible design for shared frame buffer or local frame buffer 
      architecture
    − Shared System Memory Area 2MB, 4MB and 8MB
    − Supports SDRAM and SGRAM local frame buffer and memory size up 
      to 8 MB
    − Supports Digital Flat Panel Port for Digital Monitor (LCD Panel)
    − Supports DVD H/W Accelerator
o   Integrated Second Level ( L2 ) Cache Controller
    − Write Back Cache Mode
    − Direct Mapped Cache Organization
    − Supports Pipelined Burst SRAM
    − Supports 256K/512K/1M/2M Bytes Cache Sizes
    − Cache Hit Read/Write Cycle of 3-1-1-1
    − Cache Back-to-Back Read Cycle of 3-1-1-1-1-1-1-1
    − Supports Single Read Allocation for L2 Cache
    − Supports Concurrency of CPU to L2 cache and Integrated A.G.P. 
      VGA master to DRAM accesses
o   Integrated DRAM Controller
    − Supports up to 3 double sided DIMMs (6 rows memory)
    − Supports 8Mbytes to 1.5 GBytes of main memory
    − Supports Cacheable DRAM Sizes up to 256 MBytes
    − Supports 1M/2M/4M/8M/16M/32M x N for 2-bank or 4-bank SDRAM
    − Supports 3.3V DRAM
    − Supports Concurrent Write Back
    − Supports CAS before RAS Refresh, Self Refresh
    − Supports Relocation of System Management Memory
    − Programmable CS#, DQM#, SRAS#, SCAS#, RAMWE# and MA Driving 
      Current
    − Option to Disable Local Memory in Non-cacheable Regions
    − Entries GART cache to Minimize the Number of Memory Bus Cycles 
      Required for Accessing Graphical Texture Memory
    − Programmable Counters to Ensure Guaranteed Minimum Access Time 
      for Integrated A.G.P. VGA, CPU, and PCI accesses
    − Two Programmable Non-cacheable Regions
    − Supports X-1-1-1/X-2-2-2 Burst Write Cycles
    − Fully Configurable for the Characteristic of Shadow RAM (640 
      KBytes to 1 MBytes)
    − Shadow RAM in Increments of 16 KBytes Built-in 8 Way 
      Associative/16
    − Supports SDRAM 7/8-1-1-1 Burst Read Cycles
o   Provides High Performance PCI Arbiter
    − Supports up to 4 PCI Masters
    − Supports Rotating Priority Mechanism
    - Hidden Arbitration Scheme Minimizes Arbitration Overhead
    - Supports Concurrency between CPU to Memory and PCI to PCI
    - Supports Concurrency between CPU to 33Mhz PCI Access and 33Mhz 
      PCI to integrated A.G.P. VGA Access
    - Programmable Timers Ensure Guaranteed Minimum Access Time for 
      PCI Bus Masters, and CPU
o   PCI Bus Interface
    - Supports 32-bit PCI local bus standard Revision 2.2 compliant
    - Integrated write-once subsystem vendor ID configuration register
    - Supports zero wait-state memory mapped I/O burst write
    - Integrated 2 stages PCI post-write buffer to enhance frame 
      buffer write performance
    - Integrated 256 bits read cache to enhance frame buffer read 
      performance
    - Supports full 16-bit re-locatable VGA I/O address decoding
o   Integrated Host-to-PCI Bridge
    - Supports Asynchronous PCI Clock
    - Translates the CPU Cycles into the PCI Bus Cycles
    - Zero Wait State Burst Cycles
    - Supports Pipelined Process in CPU-to-PCI Access
    - Maximum PCI Burst Transfer from 256 Bytes to 4 Kbytes
    - Supports Memory Remapping Function for PCI master accessing 
      Graphical Window
o   Integrated A.G.P. Compliant Target/66Mhz Host-to-PCI Bridge
    - Supports Graphic Window Size from 4MBytes to 256MBytes
    - Supports Pipelined Process in CPU-to-Integrated 3D A.G.P. 
      VGA Access
    - Supports 8 Way, 16 Entries Page Table Cache for GART to enhance 
      Integrated A.G.P. VGA Controller Read/Write Performance
    - Supports PCI-to-PCI bridge function for memory write from 33Mhz 
      PCI bus to Integrated A.G.P. VGA
o   Integrated Posted Write Buffers and Read Prefetch Buffers to 
    Increase System Performance
    - CPU-to-Memory Posted Write Buffer (CTMFF) with 12QW Deep, Always 
      Sustains 0 Wait Performance on CPU-to-Memory
    - CPU-to-Memory Read Buffer with 4 QW Deep
    - CPU-to-PCI Posted Write Buffer with 2 QW Deep
    - PCI-to-Memory Posted Write Buffer with 8 QW Deep, Always 
      Streams 0 Wait Performance on PCI-to/from-Memory Access
    - PCI-to-Memory Read Prefetch Buffer with 8 QW Deep
    - CPU-to-VGA Posted Write Buffer with 4 QW Deep
o   Fast PCI IDE Master/Slave Controller
    - Bus Master Programming Interface for Windows 98 Compliant 
      Controller
    - Plug and Play Compatible
    - Supports Scatter and Gather
    - Supports Dual Mode Operation - Native Mode and Compatibility 
      Mode
    - Supports IDE PIO Timing Mode 0, 1, 2 ,3 and 4
    - Supports Multiword DMA Mode 0, 1, 2
    - Supports Ultra DMA 33/66
    - Two Separate IDE Bus
    - Two 16 DW FIFO for PCI Burst Transfers.
o   Supports NAND Tree for Ball Connectivity Testing
o   576-Balls BGA Package
o   3.3V Core with mixed 2.5V, 3.3V and 5V I/O CMOS Technology

**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...
**SL82C360   'Haydn' 80386DX/SX chipset [no datasheet]         c:Jun91...
**SL82C460   'Haydn II' 80486 chipset   [no datasheet]         c:Jun91...
**SL82C470   'Mozart' 486/386 EISA chipset                     c:Dec91...
**SL82C490   'Wagner' 486?              [no datasheet]               ?...
**SL82C550   'Rossini' Pentium          [no datasheet]            c:95...
**
**Support Chips:
**SL82C365    Cache Controller (for 386DX/SX)                     c:91...
**SL82C465    Cache Controller (for 486/386DX/SX)                 c:91...
*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...
**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...
**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...
**UM82c45x     Serial/Parallel chips                                 ?...
**Other chips:...
*Unresearched:...
**A - D...
**E - G...
**H - I...
**J - R...
**S...
**T - Z...
*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...
**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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