IBM 2265 Manual page 31

EOT
2845 Address
2265 Address
I/O Channel Sequences
and Responses
I
I
I
,
,
Specific Poll Command (Hex =
40) }
Addressing
Sequence
I
I
.'
I
I
No Response
STX
Text
ETX
LRC
STX
Text
ETX
LRC
STX
EaT
I
EaT
SOH** EOT**
NAK
I
I
~
I
I
I
SOH
STX t
I
EaT
I
I
* CAN is transmitted only if the 2845 detects an internal parity
error after the ENTER key is depressed but before the message
text is completely transmitted.
No Response
No Response
** SOH or EaT response from the I/O channel to a message ending in
ETX, LRC does not restore the 2265 keyboard, clear the SaM
symbol, nor extinguish the ENTER indicator. The Enter operation
is still pending.
tSee "Error Recovery Procedures" for further I/O channel responses.
tUseful in conversation mode to restore 2265 keyboard.
Figure 6. Specific Poll to Display Station, Sequence/Response Diagram
ACK
I
2845 Sequences
and Responses
I
EaT STX
(Negative 2265 Address
response Text
to Poll) CAN*
EaT
NAKt
ETX
LRC
Principles of Operation 31