Control Data Cyber 170 State Hardware Reference Manual page 223

System Console Programming
Programming Example
The following programming example ( f i g u r e 5-13) r e q u e s t s an i n p u t of one l i n e
of d a t a from t h e system console and d i s p l a y s t h i s d a t a on t h e CRT a s I t i s
being typed.
Programming Timing Considerations
When performing an output o p e r a t i o n , t h e computer must waft a t t h e end of t h e
output f o r a channel-empty c o n d i t i o n t o prevent a l o s s of c o o r d i n a t e s o r d a t a .
A full jump a t t h e end of t h e output e n s u r e s t h a t t h e channel i s empty and the
d i s p l a y c o n t r o l l e r a c c e p t s t h e l a s t word of t h e o u t p u t b e f o r e d i s c o n n e c t i n g
from t h e channel.