SIS 471 G Main Board INV. 7.0 User Manual

[leonardo sbaraglia]

- also known as A486DX4/SIS III Mainboard
- AMI BIOS ID string 40-0107-428003-00001111-072594-SIS471-H
- 2-72 pin SIMM slots (1-64meg FPM DRAM)
- 4-30 pin SIMM slots
- 3-32bit VESA Local Bus slots
- 6-16bit ISA slots
- 1-8bit XT slot
- 32k-512k CACHE support in 8-28pin sockets + 1 TAG RAM
- AMI 1993 Auto-Detect Flash BIOS.
- Green PC Connector
- SiS 85C471 chipset
- Supports 3.45v/5volt CPU's
- ZIF 237pin CPU socket 3 which supports these processors:
INTEL 80486SX,80486DX/DX2/DX4
CYRIX CX486DX(M7)
AMD AM486DX/DX2/DX4
- Supports speeds of 20/25/33/40/50/66/75/100 MHz.
- Manufactured by: QDI
==View or Print jumper settings using Fixedsys or New Courier fonts==

SIS 471 G Main Board INV. 7.0 28 Nov 1994

- AMI BIOS ID string 40-0107-428003-00001111-072594-SIS471-H
- 2-72 pin SIMM slots (1-64meg FPM DRAM)
- 4-30 pin SIMM slots
- 3-32bit VESA Local Bus slots
- 6-16bit ISA slots
- 1-8bit XT slot
- 32k-512k CACHE support in 8-28pin sockets + 1 TAG RAM
- AMI 1993 Auto-Detect Flash BIOS.
- Green PC Connector
- SiS 85C471 chipset
- Supports 3.45v/5volt CPU's
- ZIF 237pin CPU socket 3 which supports these processors:
INTEL 80486SX,80486DX/DX2/DX4
CYRIX CX486DX(M7)
AMD AM486DX/DX2/DX4
- Supports speeds of 20/25/33/40/50/66/75/100 MHz.
- Manufactured by: QDI
================================================== =====================
TURBO switch normal TBSW 1-2
TURBO switch turbo TBSW 2-3
TURBO switch enabled (S1) TBSW 4-5
CMOS normal JP39 1-2 (default)
CMOS discharge JP39 2-3
Monitor EGA/VGA/Monochrome JP38 open
Monitor CGA JP38 closed
BIOS type EPROM JP73 1-2 (without Flash ROM)
BIOS type FLASH JP73 2-3 (with Flash ROM)
CLK down by SMI control JP10 1-2 (default)
CLK down by STPCLK control JP10 2-3
Factory setting J9 closed
" " J11 open
" " J12 open
" " JP17 1-2
" " JP20 1-2
" " JP43 2-3
" " JP71 open
" " JP78 1-2
" " JP79 2-3
---------------------------------------------------------------------------
DRAM CONFIGURATION #1
---------------------------------------------------------------------------
Size Bank 0 (30pin) Bank 1 (72pin) Bank 2 (72pin)
---------------------------------------------------------------------------
2MB NONE (1) 256K x 36 (1) 256K x 36
4MB NONE (1) 512K x 36 (1) 512K x 36
8MB NONE (1) 1M x 36 (1) 1M x 36
12MB NONE (1) 1M x 36 (1) 2M x 36
16MB NONE (1) 2M x 36 (1) 2M x 36
24MB NONE (1) 2M x 36 (1) 4M x 36
32MB NONE (1) 4M x 36 (1) 4M x 36
32MB (4) 4M x 9 (1) 2M x 36 (1) 2M x 36
36MB NONE (1) 1M x 36 (1) 8M x 36
48MB NONE (1) 4M x 36 (1) 8M x 36
64MB NONE (1) 8M x 36 (1) 8M x 36
---------------------------------------------------------------------------
DRAM CONFIGURATION #2
---------------------------------------------------------------------------
Size Bank 0 (30pin) Bank 1 (72pin) Bank 2 (72pin)
---------------------------------------------------------------------------
1MB (4) 256K x 9 NONE NONE
4MB (4) 1M x 9 NONE NONE
16MB (4) 4M x 9 NONE NONE
64MB (4) 16M x 9 NONE NONE
---------------------------------------------------------------------------
DRAM CONFIGURATION #3
---------------------------------------------------------------------------
Size Bank 0 (30pin) Bank 1 (72pin) Bank 2 (72pin)
---------------------------------------------------------------------------
8MB (4) 1M x 9 NONE (1) 1M x 36
20MB (4) 1M x 9 NONE (1) 4M x 36
32MB (4) 4M x 9 NONE (1) 4M x 36
---------------------------------------------------------------------------

[leonardo sbaraglia]

DRAM CONFIGURATION #4
---------------------------------------------------------------------------
Size Bank 0 (30pin) Bank 1 (72pin) Bank 2 (72pin)
---------------------------------------------------------------------------
6MB (4) 1M x 9 (1) 256K x 36 (1) 256K x 36
8MB (4) 1M x 9 (1) 512K x 36 (1) 512K x 36
12MB (4) 1M x 9 (1) 1M x 36 (1) 1M x 36
24MB (4) 4M x 9 (1) 1M x 36 (1) 1M x 36
48MB (4) 4M x 9 (1) 4M x 36 (1) 4M x 36
---------------------------------------------------------------------------
DRAM JUMPER SELECT
---------------------------------------------------------------------------
Configuration JP45 JP46
---------------------------------------------------------------------------
1 1-2 open
2 1-2 open
3 1-2 open
4 open closed
================================================== =====================
Cache Bank 0 Bank 1 TAG (U26)
---------------------------------------------------------
32K 4 - 8kx8 none 1 - 8kx8
64K 4 - 8kx8 4 - 8kx8 1 - 8kx8
128K 4 - 32kx8 none 1 - 8kx8
256K 4 - 32kx8 4 - 32kx8 1 - 32kx8
256K 4 - 64kx8 none 1 - 32kx8
512K 4 - 128kx8 none 1 - 32kx8
Cache JP30 JP31 JP32 JP34 JP35 JP36 JP81
----------------------------------------------------------------------
32K 1-2 1-2 1-2 open 1-2 1-2 2-3
64K 2-3 1-2 1-2 1-2 2-3 1-2 2-3
128K 2-3 2-3 1-2 2-3,4-5 1-2 2-3 2-3
256K 2-3 2-3 2-3 1-2,3-4 2-3 2-3 2-3
256K 2-3 2-3 2-3 2-3,4-5 1-2 2-3 2-3
512K 2-3 2-3 2-3 2-3,4-5 1-2 2-3 1-2
================================================== =====================
CPU Type JP27
-------------------------------
CX486S2 only closed
All others open
================================================== =====================
CPU Type J13 JP8 JP12 JP13 JP18 JP19 JP24
---------------------------------------------------------------------
80486SX closed 2-3 open open 1-2 2-3 4-5
80486DX/DX2 closed 2-3 open open 1-2 2-3 4-5
80486DX4 closed 2-3 open open 1-2 2-3 4-5
SL80486SX closed 2-3 open open 1-2 2-3 4-5
SL80486DX/DX2 closed 2-3 open open 1-2 2-3 4-5
CX486DX open 2-3 2-3 2-3 2-3 1-2 2-3
AM486DX closed 2-3 open open 1-2 2-3 4-5
CPU Type JP25 JP28 JP29 JP33 JP37 JP40 JP10
---------------------------------------------------------------------
80486SX 2-3 1-2 3-4 2-3 open 2-3 2-3
80486DX/DX2 2-3 1-2 3-4 1-2,3-4 3-4 2-3 2-3
80486DX4 2-3 1-2 3-4 1-2,3-4 3-4 2-3 open
SL80486SX 2-3 1-2 3-4 2-3 open 2-3 2-3
SL80486DX/DX2 2-3 1-2 3-4 1-2,3-4 3-4 2-3 2-3
CX486DX 1-2,3-4 open 2-3 1-2,3-4 3-4 2-3 2-3
AM486DX 2-3 1-2 3-4 1-2,3-4 3-4 1-2 2-3
================================================== =====================
Clock Speed JP5 JP6 JP7
-------------------------------------
20MHz closed open closed
25MHz closed closed open
33MHz open closed closed
40MHz closed open open
50iMHz closed closed open
50MHz open open closed
66iMHz open closed closed
75iMHz closed closed open
100iMHz open closed closed
================================================== =====================
Multiplier for 80486DX4 only JP44
-----------------------------------------------
2x 1-2
2.5x 2-3
3x open
================================================== =====================
CPU voltage JP80
-------------------------------
3.45 volts open (auto-detect with UMB onboard)
5.0 volts closed
================================================== =====================
VESA Wait States JP4
--------------------------------
0 wait state 1-2
1 wait state 2-3
CPU Speed JP3 (VESA BUS SPEED)
-----------------------------------------
<= 33MHz 1-2
> 33MHz 2-3
================================================== =====================