Chapter 2 Installation
14
Step 1 Set Switch and Jumper Options,
Continued
All jumpers are located on the half of the motherboard that includes the
CPU. Refer to the figure on the next page for the exact placement of the
jumpers.
Selecting the Frequency
Jumper
Type
20 MHz
25 MHz
33 MHz
50 MHz
J3
three-pin
Short 1-2
Short 1-2
Short 1-2
Short 2-3
J6
two-pin
Short 1-2
OPEN
OPEN
OPEN
J16
two-pin
OPEN
OPEN
OPEN
Short 1-2
J17
two-pin
OPEN
OPEN
Short 1-2
Short 1-2
J27
three-pin
Short 2-3
Short 1-2
Short 1-2
Short 1-2
J3
2x or 1x CLK Select
J6
Flush or Burst Write
J16
Speed Input to EBC
J17
Speed Input to EBC
J27
Synchronous BCLK Select
J9 Set CPU Type
J9 is a four-pin berg that selects the CPU type. When Pins 3-4 of J9 are
shorted, it is IGNNE# Pin Select. When Pins 1-2 of J9 are shorted, it is
NMI Pin Select. See the graphic on the next page for the location of J9.
CPU
Pins Shorted
80486SX
Short 2-3.
80486DX or
80486DX2
Short pins 1-2 and 3-4.
Содержание 64 Series
Страница 1: ...American Megatrends Inc Series 64 Baby EISA 80486 EISA Motherboard User s Guide MAN 664 3 15 93 ...
Страница 16: ...Chapter 2 Installation 10 ...
Страница 17: ...American Megatrends 80486 Baby EISA Motherboard User s Guide 11 ...
Страница 18: ...Chapter 2 Installation 12 ...
Страница 64: ...Chapter 4 AMIBIOS Setup 58 ...
Страница 98: ...Appendix B EISA Configuration Worksheets 92 ...