Table of Contents
Advertisement
Step 1 Set Switches and Jumpers,
J18 Select Flash EPROM Voltage
J18 is a three-pin berg that selects voltage level supplied to the Flash EPROM in U85. See page 16 for the
J18 location. A drawing of J18 with the shorting bridge installed is shown below.
Step 2 Install System Memory
The main memory subsystem on the Atlas PCI motherboard consists of six 32-bit 72-pin SIMM sockets
arranged in three memory banks. Each bank of memory consists of two sockets. Either two, four, or six
SIMMs must be installed; the memory banks are always non-interleaved.
You can use 256 KB x 36, 512 KB x 36, 1 MB x 36, 2 MB x 36, 4 MB x 36, or 8 MB x 36 bit SIMMs. The
Atlas PCI motherboard uses fast page mode SIMMs operating at 70 ns (RAS access time).
Chapter 4 Installation
22
Continued
Pin Settings
Short Pins 1-2
Short Pins 2-3
LED selected
5 volts
12 volts (Factory setting)
Advertisement
Table of Contents
