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27130A
Suspend transmitter. The transmitter on the indicated port will be
suspended as if an X-OFF had been received. Either an X-ON (if
enabled) or a Restart Transmitter
(S
above) can be used to resume
normal operation. This can be used to suspend output on receipt of
some external event (e.g., BREAK).
RTS AND WTC BLOCK DEFINITIONS
The Read Transaction Status (R TS) and Write Transaction Code (WTC) block definitions are as follows:
byte 0
1
2
7
6
•
·
.
·
opcode
o
1
5
4
3
2
opcode
--
_I
I
•
--
.
.
. · .
log channel
10
number (LCN)
.
•
•
·
•
RTS description
Nothing to do.
The LCN
field is
not used.
Sw
i
t c h tot he
transaction given
in the LCN field.
1
0
-'-
.
•
WTC description
Not used.
Resume the
transaction given
in the LCN field.
2
Terminate the data
Terminate the data
3
4
transfer for the
transaction given
in the LCN field.
Abort the trans-
action given in
the TID field.
Event sensed.
The event block as
defined below is
returned to the
host in place of
the log channel
10
number.
The MUX
card will return
up to 6 bytes for
the event block.
transfer for the
transaction given
in the LCN field.
Abort the trans-
action given in
the TID field.
Acknowledgement to
the event.
Byte 1 is the
port
10
of the port to be
acknowledged.
4-41
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