Aaeon SBC-551 Manual - page 27
Manual is about: Half-Size PISA/ISA Pentium CPU Card
of
95
Chapter 2 Installation 19
CPU frequency ratio (JP8)
JP8 must be set to match the CPU clock ratio. The chart below
show the proper jumper settings for P54C, P55C, AMD-K6, and
Cyrix 6x86 MX (M2), and their respective clock ratios.
CPU frequency Ratio (JP8)
JP6
P54C
P55C
AMD-K6 Cyrix 6x86MX
1.5
3.5
3.5
3.5
2.0
2.0
2.0
2.0
*
3.0
3.0
3.0
3.0
2.5
2.5
2.5
2.5
-
-
5.5
5.5
-
-
4.0
4.0
-
-
5.0
5.0
-
-
4.5
4.5
* default setting
6
5
4
2
3
1
6
5
4
2
3
1
5
1
6
4
2
3
5
3
1
6
4
2
5
1
6
4
2
3
5
1
6
4
2
3
6
4
2
5
3
1
6
4
5
3
2
1