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FIRMWARE
Host CPU to iSBC Controller Messages
B.3.2.1.6
ABORT TRANSMIT.
This message is used to abort a
transmission already in progress.
This function is expected to be useful for operating system drivers
to implement the purge transmit buffer operation commonly requested
with an
"0"
character.
If a transmission is not in progress on the line, the command is
ignored. otherwise, a Transmit Complete message is returned. If
there are multiple outstanding transmit requests for the line, only
the current (the one issued the earliest) is aborted.
Figure B-ll shows the Abort Transmit message format.
Message Format
o
1
2
06H
Line Number
Reserved
NOTE
Reserved space
should be set to
00 (H) .
151
Reserv~
Line Number
Response
The serial channel on which transmission is
aborted.
A Transmit Complete message is returned if a
transmission was indeed aborted.
Figure B-11.
Abort Transmit Message Format
B-22
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