JP4 must be set to match the clock ratio of CPU. The chart below
shows the proper jumper setting.
freq ratio = 2
freq ratio = 2.5
freq ratio = 3*
freq ratio = 3.5
freq ratio = 4
*default
JP3 must be set to match the CPU Bus frequency. The chart below
shows the proper jumper setting.
60 MHz
66 MHz*
*default
JP4
2
4 6
8
1
3
5
7
2
4 6 8
1 3
5 7
2 4
6 8
1 3
5 7
2 4
6 8
1 3
5 7
2 4
6 8
1 3
5 7
JP3
2
4
1
3
2
4
1
3