Zenith Data Systems Z-171 PC Series Service Manual page 69

Page 5-7
Configuration
Memory Board
The memory board has five jumpers that are used to select the base
size and the configuration of the total amount of installed memory. Jumper
5 has two positions; up and down. Jumpers 6, 7, 8, and 9 each have
three positions; left, right, and open (no jumper installed or on one pin
only). Refer to Figure 5-4 for the location of these jumpers.
ba
== JMP8 JMP6f
men penny
Figure 5-4: Memory Board Jumpers
In addition to 64-kilobit chips, 256-kilobit devices may be used to expand
the user memory; however, only one type of chip may be installed in
a bank. Refer to Table 5-3 for the jumper settings necessary to obiain
a specific memory size and Figure 5-4 for the location of each jumper.