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USER’S MANUAL
A50 MAIN BOARD
482A5001
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Printed in Taiwan 2000
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INDEX
This user’s manual describes the jumper setting of A50 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 A50 main board 1
2. Memory configuration 2
3. Jumper setting 3 – 4
All other registered and unregistered trademarks are trademarks of their respective
holders
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1. Jumpers Location Diagram for "A50 V1.X " Pentium-II
Main Board
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2. Memory configuration
l System Memory Configuration
The 3000 series provides three 168-pin DIMM (Dual in-Line Memory Module )
sockets to support maximum 768MB 100MHz SDRAM. Either 8MB, 16MB,
32MB, 64MB, 128MB, 256MB 3.3V DIMM can be installed on these three
sockets.
A combination of different capacities is supported. Please note to use the same
brand of SDRAM for the three SIMM socket.
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3. Jumper Setting
=CPU type selection :
CPU
Intel Pentium II 450MHz 4.5x 100MHz Open Close Open Close Open
Intel Pentium¢º400MHz 4.0x 100MHz Open Close Close Close Open
Intel Pentium¢º350MHz 3.5x 100MHz Open Close Open Open Close
Intel Pentium¢º300MHz 3.0x 100MHz Open Close Close Open Close
Intel Pentium¢º333MHz 5.0x 66MHz Close Close Close Open Open
Intel Pentium¢º300MHz 4.5x 66MHz Close Close Open Close Open
Intel Pentium¢º266MHz 4.0x 66MHz Close Close Close Close Open
Intel Pentium¢º233MHz 3.5x 66MHz Close Close Open Open Close
Intel Celeron 333MHz 5.0x 66MHz Close Close Close Open Open
Intel Celeron 300MHz 4.5x 66MHz Close Close Open Close Open
Intel Celeon 500MHz 5x 100MHz Open Close Close Open Open
Intel Celeron 550MHz 5.5x 100MHz Open Close Open Open Open
(Remark: All Intel CPU will auto detect jumper setting automatically)
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M-System Disk On Chip:
Freq. Ratio Externa
l
Clock
JP1
9-10
JP1
7-8
JP1
5-6
JP1
3-4
JP4 JP5 USER ADDRESS
1-2 1-2 0C800-0C9FF
1-2 3-4 0CC00-0CDFF
3-4 1-2 0D000-0D1FF
3-4 3-4 0D400-0D5FF
5-6 1-2 0D800-0D9FF
6-5 3-4 0DC00-0DDFF
JP1
1-2
3
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=
CMOS Operation mode: J31
Function J31
CMOS Normal 2-3
CMOS Reset 1-2
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ATX / AT power mode: JP7
Function JP7
Use FT-8012 as ATX power supply 3-5 , 4-6
Use FT-8012 as AT power supply 1-3 , 2-4
Note:
FT-8012 is ATX type power supply used for 3000 series
Booksize PC
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