NOTE: For World Trade operation when using Telegraph Term
inal Control Type 1, this status indicates that the End of
Block(£OB) signal was received--that is, "FIGS-X" (upper
case X).Channel End, Device End, and Unit Exception
The conditions that cause this status to be signaled
depend on both the type of line and terminal control
involved, as well as the particular command that
was issued. It w ill never be signaled for Disable,
Break, orSense. For the remaining commands, this
status indication is influenced by the type of terminal
control involved, as follows:30 Read vi Inhibit Search Write
orPoll Tenllinal C011Lrvi Ty}?c: 1. This
status is signaled if(Q (EaT) or ® (negative reply) is received while the
addressed linc is in control mode and
executingeither of these conunands. It is also set any time a © is received,
providing the 2741 Break feature is not
installed.
IBM TerminalControl Type II. This
status is signaled if® is received
whilethe addressed line is executing
either of these commands and the line
is in control mode. It is also set any
time a © is received.
Telegraph TerminalControl Type I. Operating with 83B2/83B3 and 115A
terminals, tIlis status is set if the End
of Transmission signal(FIGS- H, LTRS) is received while the addressed
line is executing either a Read or
Inhibit command.
Telegraph TerminalControl Type II.
This status means that theEOT character was received while executing
either of these commands.
World Trade Terminal Control. This status means that the EOT sequence was received while
executing either oftilese commands.
Telegraph TerminalControl Type I
(only). With either 83B2/83B3 or
115A terminals, this status indicates
that the EaT sequence(FIGS-H, LTRS) was received while executing this
command.
This status is signaled if the receive
control bit in the addressedMCW-l is ON when the command is accepted. The r:om mand' s execution is termina
tedimmediately. Dial
PrepareEnahlp Wrap
If HaltI/O is signaled during the execu
tion of Dial, beforeStop was received
from theI/O channel (the entire
number has not been dialed), the Dial
operation is endedwith this status.
If HaltI/O is issued to a line that is
executing Prepare, and the line has
started to receive (a true start bit
was detected) but the ending status
has not yet been signaled, then this
status is signaled at the normal ending
point for this command, after the line
returns to Mark.This statue: is signa1ed if Halt Tla is
issued to a line that is executing
Enable and the call has not yet been
answered (DataSet Ready is OFF). The 'enable' latch is reset.
This status will be signaled if the
receive-control bit in the addressedMCW-l is ON when the Wrap command
is accepted.Channel End, Device End, Unit Exception, and Unit Check The conditions that cause this status to be signaled
are a combination of the conditions that cause the
command to end withChannel End, Device End, and Unit Exception status plus one or more of the error
conditions that cause the sense bitsto. be set. A Sense command should be issued to the unit address
.in order to determine the error conditions. The
conditions that can be signaled are listed under"Sense-Byte Conditions." This status can be signaled
only when ending Wrap, Read, Write, Dial, Prepare,
Enable, Inhibit,Search, or Poll. Channel End, Device End, and Unit Check This status indicates that the current command has
been ended by an error or an unusual condition. ASense command must be issued to the addressed unit
to further define these conditions.Channel End, Device End, and Status Modifier
This status is set for thePoll command when a @ (EOA) character is detected. SENSE - BYTE CONDITIONS The sense byte is transferred to the multiplexer
channel only when aSense command is issued. The
various bit positions within the byte are set byI
inal Control Type 1, this status indicates that the End of
Block
case X).
The conditions that cause this status to be signaled
depend on both the type of line and terminal control
involved, as well as the particular command that
was issued. It w ill never be signaled for Disable,
Break, or
status indication is influenced by the type of terminal
control involved, as follows:
or
status is signaled if
addressed linc is in control mode and
executing
providing the 2741 Break feature is not
installed.
IBM Terminal
status is signaled if
while
either of these commands and the line
is in control mode. It is also set any
time a © is received.
Telegraph Terminal
terminals, tIlis status is set if the End
of Transmission signal
line is executing either a Read or
Inhibit command.
Telegraph Terminal
This status means that the
either of these commands.
World Trade
executing either of
Telegraph Terminal
(only). With either 83B2/83B3 or
115A terminals, this status indicates
that the EaT sequence
command.
This status is signaled if the receive
control bit in the addressed
ted
Prepare
If Halt
tion of Dial, before
from the
number has not been dialed), the Dial
operation is ended
If Halt
executing Prepare, and the line has
started to receive (a true start bit
was detected) but the ending status
has not yet been signaled, then this
status is signaled at the normal ending
point for this command, after the line
returns to Mark.
issued to a line that is executing
Enable and the call has not yet been
answered (Data
This status will be signaled if the
receive-control bit in the addressed
is accepted.
are a combination of the conditions that cause the
command to end with
conditions that cause the sense bits
.in order to determine the error conditions. The
conditions that can be signaled are listed under
only when ending Wrap, Read, Write, Dial, Prepare,
Enable, Inhibit,
been ended by an error or an unusual condition. A
to further define these conditions.
This status is set for the
channel only when a
various bit positions within the byte are set by