Cpu Board Jumper Settings - Mitsubishi Electric APRICOT FT//EX User Manual

Table 3-2 lists the jumpers on the 486 CPU board and their corresponding
settings.
Table 3-2

486 CPU Board Jumper Settings

Jumper
CPU Clock Frequency Setting
JP1
JP2
PGA CPU Type Setting
JP4
LADS Setting for VESA Local Bus (Master Support)
JP3
Local Bus Enabling
JP10
System Speed
JP8
JP9
Settings
Open
Closed
Open
Closed
Open
1-2
2-3
1-2 *
2-3
1-2
2-3 *
1-2
2-3
1-2
2-3
Function
25 MHz (DX2-50)
33 MHz (DX2-66)
40 MHz
50 MHz
25 MHz (DX2-50)
40 MHz
33 MHz (DX2-66)
50 MHz
486DX, 486DX2
486SX
487SX, ODP 486SX, P24T
33 MHz
50 MHz
Disable
Enable
25 MHz, 33 MHz
40 MHz, 50 MHz
25 MHz, 40 MHz
33 MHz, 50 MHz
486 CPU Board 3-7