Step 2 Set Jumpers,
JK3, JK2, JK1 CPU Speed JK3, JK2, and JK1 are three-pin bergs that together select the CPU clock speed.
J5 Bus Clock
J5 is a three-pin berg that sets the bus clock speed.
Intel P54CQS A80502-120
Step 3 Install Memory
The main memory subsystem on the Apollo Pentium PCI motherboard has four 32-bit SIMM (Single Inline
Memory Module) memory sockets arranged in two memory banks. The motherboard supports 8 to 128 MB
of onboard system memory. You can use:
1 MB x 32 or 36,
4 MB x 32 or 36,
8 MB x 32 or 36,
16 MB x 32 or 36, or
32 MB x 32 or 36 SIMMs.
The motherboard supports banks of fast page mode and EDO (Extended Data Out) memory together
operating at 60 ns or 70 ns.
22
Continued
Jumper
50 MHz
JK3
Short Pins 2-3
JK2
Short Pins 1-2
JK1
Short Pins 2-3
CPU Type
Intel P54C A80502-75
Intel P54C A80502-90
Intel P54C A80502-100
Apollo Motherboard User's Guide
60 MHz
66 MHz
Short Pins 1-2
Short Pins 1-2
(Factory setting)
Short Pins 1-2
Short Pins 2-3
(Factory setting)
Short Pins 1-2
Short Pins 2-3
(Factory setting)
Clock
J5 Setting
PCLK/3
Short Pins 1-2
PCLK/4
Short Pins 2-3
PCLK/4
Short Pins 2-3
Cont'd