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USER’S MANUAL
A47 MAIN BOARD
482A4703
Printed in Taiwan 2000
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INDEX
This user’s manual describes the jumper setting of A47 Main Board. For
detailed technical information, please refer to CDs attached with PC system
unit.
Table of Contents Page
Technical details
1. Jumpers location diagram for A47 main board 1
2. Memory configuration 2
3. Jumper setting 3 – 6
All other registered and unregistered trademarks are trademarks of their respective
holders
1. Jumpers Location Diagram for "A47 ver 3.X" Main Board
1
2. Memory Configuration
•
System Memory's Configuration.
Following table illustrates how to expand the memory size on the main board.
Capacity SIMM 1 Socket SIMM 2 Socket
4MB
8MB
8MB
8MB
16MB
16MB
16MB
32MB
32MB
32MB
64MB
•
VGA Memory's Configuration.
For "47" main board, Video memory capacity standard is 1MB and expandable to 2MB.
Please contact your distributor the procedure how to upgrade VGA memory.
4MB (single bank module) /
4MB (single bank module ) 4MB (single bank module)
8MB (double bank module ) /
/ 8MB (double bank module )
8MB (double bank module ) 8MB (double bank module )
16MB (single bank module ) /
/ 16MB (single bank module)
16MB (single bank module ) 16MB (single bank module )
32MB (double bank module ) /
/ 32MB (double bank module )
32MB (double bank module ) 32MB (double bank module )
Following table illustrate how to expand the VGA memory size on the main board.
Capacity U24 U25 U26 U27 Video DRAM Type
1MB
2MB
( Note 1 : Installed - ON, None installed - BLANK )
( Note 2 : 512KB is used for Cirrus GD-5430 chipset only )
ON ON 256KB X 16 SOJ package
ON ON ON ON 256KB X 16 SOJ package
2
IMPORTANT
The on board VGA function can not be disabled. If an VGA
card must be installed, please be sure to disable on board VGA
function by removing main board‘s VGA chipset and VGA
RAM
3 Jumper settings
CPU type selection: JP1, JP2, JP3
CPU JP1 JP2 JP3
Intel 486SX 2-4 1-3 Open
Intel 486DX/DX2/DX4 3-5, 4-6 1-3 Open
Intel 486SX-S (Green ) 2-4 1-3 7-8, 11-12, 15-16
Intel 486DX/2/4-S (Green) 3-5, 4-6 1-3 7-8, 11-12, 15-16
Intel P24C 3-5, 4-6 1-3 7-8, 11-12, 15-16
Intel 486DX/DX2/DX4
(Write Back)
Intel P24T 1-3, 4-6 3-5 7-8, 11-12, 15-16
AMD 486DX /DX4 (NV8T) 3-5, 4-6 1-3 Open
AMD 486DX2/DE2(NV8T)
AMD DX2 (enhance SV8B)
AMD X5 (AM5x86)
AMD DX4 (SV8B)
Cyrix Cx5x86
Cyrix/ IBM/TI DX/DX2 3-5, 4-6 1-3, 2-4 1-2, 9-10, 13-14, 17-18
3-5, 4-6 3-5, 4-6 3-4, 7-8, 11-12, 15-16
3-5, 4-6 1-3 19-20
3-5, 4-6 3-5,4-6 0-1, 3-4, 7-8, 11-12, 15-16
3-5,4-6 3-5,4-6 3-4, 7-8, 11-12, 15-16
CPU Clock Selection
CPU Clock JP16
SX-25 / DX-50 / DX4-75 1-2
SX-33 / DX-33 / DX2-66 / DE2-66 / DX4-100 / 5x86-133 1-2, 3-4, 5-6
DX-40 / DX2-80 / DX4-120 / 5x86-120 1-2, 3-4
DX-50 / DX2 - 100 5-6
3
PCI Bus Clock Selection
PCI Clock JP23 JP11
> 33MHz 1-2 close
< =33MHz 2-3 open
CPU Power Selections
CPU Power JP4 JP5
5V 1-3, 2-4 /
3.3V 3-5, 4-6 5-6
3.5V 3-5, 4-6 3-4
On-board Cache SRAM Size Selection
Cache SRAM Size JP7
128KB 3-5, 4-6
256KB 1-3, 4-6
512KB 1-3, 2-4
On-board Keyboard Interface Selection
Keyboard Interface JP12 JP15
8042/80C42 Close 1-3, 2-4
Built-in Core Logic Open 3-5, 4-6
RTC Interface Selection
Function JP10 JP8 JP22 *JP2
RTC chipset is 12C887A Close Close 1-2 Open
RTC chipset is built-in Core Logic Open Open / /
12C887A SRAM Clean Close Close / Close
* JP2 is subject to customer‘s request
4
Power Supply Selection
Power JP14 JP24 JP25
External Power for 5000 series Close Open Open
Internal Power for 1000/4000 series Open Close Close
Reserve: JP6, JP9, JP11, JP18 (Open)
On-board VGA Interface Selection
Function R66 R67 R68
On-board VGA chipset is GD-5434 Install Install Uninstall
On-board VGA chipset is GD-5430 Install Uninstall Install
On-board VGA chipset is GD-5440 Install Uninstall Install
On-board VGA chipset is GD-5446 Install Install Uninstall
On-board Flash ROM (BIOS) Selection
Flash ROM Vpp type JP13
+12V 1-2
+5V 2-3
Serial Port CD (carrier detect) signal Selection
Function JP20
Port 1 CD signal connect to COM1output connector pin1
+5V connect to COM1 output connector pin 1
+12V connect to COM1 output connector pin 1
1-2
3-4
5-6
Function JP21
Port 2 CD signal connect to COM2 output connect pin 1
+5V connect to COM2 output connector pin 1
+12V connect to COM2 output connector pin 1
1-2
3-4
5-6
5
Parallel Port DMA Channel For SMC 37C669
DMA Channel Selection JP19
Channel 3 1-3, 2-4
Power Connector Selection
Power Supply Type CN1 CN2
2000/4000 series
internal power
5000 series
External power
connect to power
supply‘s DC output cable
connect to DC switch
cable
none
connect to DC power cable
from DC power jack
PCI Bus Hardware ID Default
PCI Interface Controller Hardware ID
VGA Cirrus CL-GD543x ID SEL = 19
VGA to TV Connector Description
JP1 Pin # Description
1 GND
2 Blue Signal
3 GND
4 Green Signal
5 GND
6 Red Signal
7 Detect VGA Monitor
8 Hsync Signal
9 GND
10 Vsync Signal
6
7
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