IBM 5155 - Page 308

Math Coprocessor Switch Settings
The following figure shows the setting for switch 2.
Warning: Before you change any switch settings,
make a note of how the switches are presently set.
2345678
With Coprocessor
~D~DDDDDD
2 3 4 5 6 7
Without
Coprocessor
~D~DDDDDD
4-80 Switch Settings
8