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#1
#2
O
S
O
S
O
S
O
S
O
O
O
O
S
S
S
S
S
S
S
S
S
O
S
O
※ SDRAM Clock Asynchronous as CPU Bus frequency let user can use slow
speed SDRAM when CPU clock over 83MHz. S : short (ON) O : open (OFF)
§ Table for CPU ratio selector : JP2
CPU ratio
1.5 X / 3.5 X
2.0 X
2.5 X
3.0 X
4.0 X
4.5 X
5.0 X
5.5 x
Table for CPU Type selection :
CPU Type
233MHz Pentium processor
with MMX technology
AMD K6-233
Cyrix 6X86 MII 300
200MHz Pentium processor
with MMX technology
AMD K6-200
Cyrix/IBM 6X86 MII 233
AMD K6/266
AMD K6-2/266
AMD K6/300
AMD K6-2/300
AMD K6-2/333
AMD K6-2/350
AMD K6-2/400,K6-3/400
AMD K6-2/450,K6-3/450
Cyrix 6X86MII-266
Cyrix 6X86MII-300
IDT Winchip-225
#3
S
S
O
O
S
S
S
S
O
O
S
S
BF0
BF1
OFF
OFF
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
OFF
ON
OFF
OFF
SW1(Bus clock)
#1
#2
#3
O
S
O
S
O
S
O
S
O
O
O
S
O
O
O
O
O
O
O
O
S
O
O
S
O
O
S
#4
CPU Bus Clock
S
66.8 MHz
O
75 MHz
S
83.3 MHz
O
95 MHz
S
100 MHz
O
112 MHz
S
66.8 MHz
O
83.3 MHz
S
95 MHz
O
100 MHz
S
105 MHz
O
112 MHz
BF2
OFF
OFF
OFF
OFF
ON
ON
ON
ON
JP2 (clock ratio)
#4
BF0
BF1
S
S
O
O
S
S
S
S
S
S
S
S
S
S
O
O
O
S
S
O
S
S
S
S
S
S
S
S
S
O
S
O
O
7
SDRAM Clock
66.8 MHz
75 MHz
83 MHz
95 MHz
100 MHz
112 MHz
89 MHz *
66.8 MHz *
63.3 MHz *
66.6 MHz *
75 MHz *
74.4 MHz *
Bus clock Clock ratio
BF2
O
O
66MHz
S
O
66MHz
66MHz
O
S
S
S
66MHz
S
O
100MHz
95MHz
O
O
100MHz
O
O
O
S
100MHz
S
S
100MHz
83MHz
S
O
83MHz
O
O
S
O
75MHz
3.5X
3.0X
4.0X
4.5X
3.0X
3.5X
3.5X
4.0X
4.5X
2.5X
3.5X
3.0X
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