Varian Data 620/i System Reference Manual page 154

Table H-3
Teletype Reserve Instruction Codes
Table H-3(a)
Model A Teletype Instructions
Mnemonic
Octal
Function
A.
Externa I Control
EXC 000 100000 Select High-Speed Input
EXC 100 100100 Select Paper Tape I npu t
EXC 200 100200 Select Keyboard Input
EXC 300 100300 Select Page and/or Paper Tape Out
EXC 400 100400
Select Off
B. Transfer
OAR 00 103100 Transfer A Register to TTY Buffer
OBR 00 103200 Transfer B Register to TTY Buffer
OME 00 103000 Transfer Memory to TTY Buffer
INA 00 102100 Transfer TTY Buffer to A Register
INB 00 102200 Transfer TTY Buffer to B Register
IME 00 102000 T ra nsfer TTY Bu ffer to Memory
CIA 00 102500 Transfer TTY Buffer to A Register cleared
CIB 00 102600 Transfer TTY Buffer to B Register cleared
C.
Sense
SEN 000 101000
Sense TTY Not Busy
SEN 100
101100 Sense TTY Buffer Ready
SEN 300 101300
Sense TTY Reader Ready
The following are A-type teletypes:
620-60A
H-3