American Megatrends Apollo, User Manual

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22 Apollo Motherboard User’s Guide
Step 2 Set Jumpers,
Continued
JK3, JK2, JK1 CPU Speed JK3, JK2, and JK1 are three-pin bergs that together select the CPU clock speed.
Jumper 50 MHz 60 MHz 66 MHz
JK3 Short Pins 2-3 Short Pins 1-2
(Factory setting)
Short Pins 1-2
JK2 Short Pins 1-2 Short Pins 1-2
(Factory setting)
Short Pins 2-3
JK1 Short Pins 2-3 Short Pins 1-2
(Factory setting)
Short Pins 2-3
J5 Bus Clock J5 is a three-pin berg that sets the bus clock speed.
CPU Type Clock J5 Setting
Intel P54C A80502-75 PCLK/3 Short Pins 1-2
Intel P54C A80502-90
Intel P54C A80502-100
PCLK/4 Short Pins 2-3
Intel P54CQS A80502-120 PCLK/4 Short Pins 2-3
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.
Cont’d