Enable,
Disable,
Adprep,
Prepare
The Interface
command to cease transferring
data to the channel and stop
monitoring for valid
and Lost Data (sense-bit 6) are
set to one.
data will always be lost when the
Interface
The stop signal indicates that
the last character (EaT) has
been transferred from main
storage to the
rent
and ends the command with
Channel End and Device End
status
poll operation before ending the
command. Note that the program
must ensure that the byte count
is exactly as large as the poll
list so that the last character
transferred by the
mand is index character for the
last poll in the list.
No data-byte transfers occur
with execution of these commands;
accordingly, Interface
never signaled.
The Interface
this command to end immediately
with Channel End and Device End
status
A Halt
issued, various actions take place, depending on the
command being executed:
Command
If
from main storage, the com
mand ends immediately with
Channel End, Device End, and
36, 37, and 39). The
reset. If
Enable
Dial
Write
Read
Prepare
times, it has no effect on the
set is not operational (i. e. ,
before the call has been answer
ed), the command is ended with
Channel End, Device End, and
36, 37, and 39).
execution of the Enable command
and the
An
Interface
transmitted to the
entire number has not been
dialed) results in aborting the
dialing operation, the resetting
of the enable and dial circuitry,
and the immediate ending of the
command with Channel End,
Device End, and
status
39). If
Interface
received, the dialing operation
proceeds normally.
any currently buffered characters
and then terminate the com mand.
stop transferring data to the
channel. The
(sense-bit 6) bits are set to one.
lost when the
during a Read command execu
tion. The command ends im
mediately.
If
phase is established, the com
mand ends immediately with
Channel End, Device End, and
36, 37, and 39). If
issued after character phase has
been established, there is no
effect.
63