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Maintenance Procedures
4-53.
MEMORY MODULE SELECTION. Two five-position switches Sl and S2, are used to
select the memory module. See figure 4-8. Sl and S2 switch positions must always be identical, and set
to the NORMAL position. The remaining switch positions are used for factory test purposes. Inadver-
tantly using a position other than NORMAL could cause the wrong memory module to be selected.
TOP 1 ' 3 ' - - - - - - - - - - - · 79
BOTTOM 2, 4, •
• 80
P1
S BUS peA
30003·60005
1 , 3 , - 0 - - - - - - - - . 79
2,4, •
0
80
G
(0
~o
~
/ "
0,""",
1..--~T:02~~\P, P4,~.~~~!m~~:--~J:i22~2~, 4~,~.~~~~
..
~ 50r----:JjJ3~2~,4~,~.~~m!~.~50r--~
BOTTOM 1,3,-0----049
1,3,-·---.--49
1 , 3 , - · - - - - -49
7522-25
MEMORY SIZE
(WORDS)
S3
1 -48K
2
-64K
3 - 80K
4 -
96K
5 - 112K
6 - 128K
7 - 160K
8 - 192K
9 -
224K
0- 256K
MEMORY MODULE SELECTION
51 AND S2
1 - FACTORY TEST POSITION
2 - FACTORY TEST POSITION
3-NORMAL
4 - FACTORY TEST POSITION
5 -
NO CONNECTION
NOTE: S1 AND S2 SWITCH POSITIONS
MUST BE IDENTICAL
Figure 4-8. S Bus peA Switch Locations
4-17
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