Table 2-2.Tone Library
Figure 2-14.Link-11 data phase shift encoding.
Link Protocol and Interface Control
In addition to encoding data from the CDS
computer, the DTS generates and recognizes protocol
data that controls the type and number of link
transmissions. These protocol words include codes
indicating the start of transmission, the end of
transmission, and the address of the next unit to
The interface with the CDS computer is under the
control of the DTS. The DTS signals the CDS
computer when it has input data or when it wants
output data through the use of external interrupts.
These interrupts include the prepare-to-transmit,
prepare-to-receive, and end-of-receive interrupts.