Air 486PH, Руководство пользователя, Страница: 10 / 48

CPU Jumpers
CPU Type Selection Jumpers
CPU Type JP10 JP16 JP23 JP24 JP25
Intel 486SX Short Open Open 2-3 1-2
Intel 486DX, DX2,
DX4 (Default)
Short Open Open 1-2 1-2
AMD 486DX,
DX4* Short Open Short 1-2 2-3
AMD 486DX2* Short Open Open 1-2 2-3
Cyrix 3.3-Volt
486DX, DX2 Short Short Short 1-2 2-3
Cyrix 5-Volt
486DX, DX2 Short Open Short 1-2 2-3
* Chipset auto detects AMD 3.3-Volt and 5-Volt CPUs, no
special jumper setting is required.
CPU Clock Frequency Selection Jumpers
If you are installing an 486DX or 486SX CPU, the internal CPU
clock speed is the same as the external CPU clock speed. This is
different for 486DX2 CPU where the external speed is one-half
of the internal speed. For example, a 486DX2-66 has an
external clock speed of 33MHz.
Clock
Frequency
CPU supported JP6 JP19 JP20 JP21
33 MHz 486SX-33
487SX-33
486DX-33
486DX2-66
486DX4-100
P24T 1-2 Open Short Short
25MHz 486SX-25
487SX-25
486DX-25
486DX2-50
486DX4-75 2-3 Short Open Open