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I/O Channel Sequences
and Responses
2845 Address
Addressing
EOT
}
2265 Address
Sequence
Read Command (Hex
=
50)
I
STX
Text
ETX
LRC
STX
Text
Etc.
Legend:
STX
EOT
SOH
SOH
EOT
EOT
NAK
I
I
I~
I
I
I
I
* The nondestructive cursor is moved to the first character
position of the screen (upper left corner). For machines
equipped with the Destructive Cursor Feature, see programming
note under "Read Full DS Buffer" in text.
No Response
No Response
** CAN is transmitted if the 2845 detects on internal parity error
and no operator intervention has o~curred (depression of RESET key)
prior to recognition of command.
t
See "Error Recovery Procedures" for further I/O channel responses.
Figure 9. Read Addressed Full DS Buffer, Sequence/Response Diagram
ACK
I
2845 Sequences
and Responses
I
STX
2265 Address
Text* (full buffer)
CAN**
ETX
LRC
NAKt
Principles of Operation 35
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