IBM 5150 Hardware Maintenance Manual page 314

Memory Expansion Options
The following are switch settings on each Memory Expansion Option.
Note: Positions 6-7-8 always ON.
Option 1
",.-.... 32KB
96KB
I~ ~ ~ ~ ~
0 0 0
64KB
128KB
I~ ~ ~ ~ ~
0 0 0
Option 2
32KB 32KB
128KB
11~ ~ ~ ~ ~ 0
0
0 111~ ~ ~ ~ ~ 0
Dol
64KB 32KB
'160KB
:I~ ~ ~ ~ ~
0
0
0
Il~ ~ ~ ~ ~
0
0
0
I
. . Option 3
",.-.... 32KB 32KB 32KB
160KBI'~ ~ ~ ~ ~ 0
Dol
,~~ ~ ~ ~ 0
0
0 1~ ~ ~ ~ ~ 0
0
0
64KB 64KB
192KB
Il~ ~ ~ ~ ~ 0
0
0 111~ ~ ~ ~ ~ 0
0
0
I
64KB 32KB 32KB
'92KBIIMM
~
DO
0
II~
M
MODO
11M
~
MODO
I
64KB 64KB 32KB
224KBI1~ ~ ~ ~ ~ 0 0 0 11~ ~ ~ ~ ~ 0 0 0 11~ ~ ~
Q
~ 0
Dol
",.-....
64KB 64KB 64KB
256KB,.-,-------,---I~ ~ ~~' ~ ~ ~ ~ 0
0
0 11~ ~ ~ ~ ~ ~ DTIDll~ ~ 0
0
0
I
5-9