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USER’S MANUAL
B51 MAIN BOARD
482B5100
Printed in Taiwan 2000
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INDEX
This user’s manual describes the jumper setting of B51 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 B51 main board 1
2. Memory configuration 2
3. Jumper setting 3
All other registered and unregistered trademarks are trademarks of their respective
holders
1. Jumpers Location Diagram for "B51 V1.X " main board
JP14
JP21
RJ1
CN16
CN1
EISA SLOT
2
JP1
EISA SLOT
44
2
CN14 CN15
33
34
39
43
SDIM CN18
1
U1
CPU
6
51
CN10
CN2
CN9 CN3
1
2
1
2
1
240
JP11
1
2
JP22
5
6
CN17
2
JP20
81
1 4
1
JP9 JP10
CYRIX
CX5530
3 1
U21
NS
PC9317
25
26
CN13 CN12
1
JP5
CN11
DOC
U25
2
1
JP19
2
1
3
1
1
2
2
JP8
1
2
3
4
1
2
5
6
JP7
1
JP12
6
JP13
2
1
4
JP3
1
CN6
CN8
CN5CN4CN7
127
JP6
3 1
J1
8
1
2.Memory configuration for “B51 V1.X” main board
The basic system memory configuration of this Net PC Series is
32MB SDRAM at jumper location U31, U32, U33 and U34.
It supports 4MB VGA share memory (UMA). It is optional
for memory expansion by a 144-pin S.O. DIMM socket (CN18).
To use same type of SDRAM for expansion is important.
2
3. Jumper Setting
=CPU type selection : JP1
CPU 1-2 3-4 5-6
Gxm 200MHz Open Close Open
Gxm 233MHz Close Open Open
Gxm 266MHz Open Open Open
Gxm 300MHz Close Open Close
=
CMOS Data Clean : J1
CMOS data J1
Clean 2-3
Normal (default) 1-2
To reset CMOS data, please move power connector
away from PC system after power off if ATX
type power supply is used. Otherwise the 5VSB (stand by voltage ) still exists and RTC will not be cleaned
without removing power connector.
=
Reset Switch : JP21
Mode JP21
Reset Close
Normal mode (default) Open
3
IMPORTANT !
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