IBM 2702 Information Manual page 49

Start/Stop Termi nal Controls
IBM Terminal Control-Type I IBM Terminal Control-Type II
Telegraph Terminal Control-Type II Telegraph Terminal Control-Type I
(1050,60, and 70. 2740, ( 1030)
(TTY 33 and 35) (TTY 28 and 2712 M2)
and 2741 with Interrupt)
Read 1. Data service bit was on when read command was issued.
2. Receive bit was on when Holt I/O was issued.
3. Da.ta service bit was on when Halt I/O was issued.
4. Channel issued STOP during read service operations.
Inhibit
1. Receive bit was on when Halt I/o WaS issued.
2. Data Svc was on when the command was issued.
3. Data Svc was on when Halt I/O was issued.
Search
1. Receive bit was on when
Half I/O was issued.
2. Receive bit was on when
search command was issued.
3. Data Svc was on when the
command was issued.
4. Data Svc was on when Halt
I/o was issued.
5. Channel issued Stop during
Read Service operation.
Dial The data set is *OFF HOOK.
The data set is *OFF HOOK.
Present next digit rec'd during
Present next digit rec'd during
Seq O.
Seq O.
Holt I/o rec'd before cmd
Halt I/O rec·d before cmd
ended.
ended.
Prepare
Receive bit was on when Halt I/O was issued.
*
OFF HOOK means that Data Set Ready rises before all dial digits (Sequence 4) have been presented.
Figure 2-17. Sense Bit 6, Lost Data (Part 1, SIS)
Binary Synchronous Terminal Control
Read 1. Data service bit was on when read command was issued.
Search
2. Receive bit was on when Halt I/O was issued.
3. Data service bit was on when Halt I/O was issued.
4. Channel issued STOP during read service operations.
Dial
The data set is *OFF HOOK.
Present next digit rec'd during
Seq O.
Halt I/o rec'd before cmd
ended.
Figure 2-17. Sense Bit 6, Lost Data (Part 2, BSC)
Operations 2-33