IBM 3164 ASCII Manual page 212

8-bit Mode Operation
The figure below shows the character set selection for the outbound operation.
01 234567
B
Character
Set
1
(ASCII)
111111
012345
Character
Set 2
7
Alternate
Charact~rs
234567
Special
Graphics
The figure below shows the character set selection for the inbound/keyboard
operation.
01 234567
111111
012345
B
I
SCS-GO Ir----SCS-G1---,--------,
234567 345 7 7 234567
Character
Set 1
(ASCII)
Character
Set 2
Alternate
Characters
Special
Graphics
F-11