Internal Data Transmission Instructions - IBM 1620 1 Manual

P address' must be an even-numbered address.) If
the location tested contains a group mark, the next
instruction in sequence is executed.
It should be noted that the Branch No Record
Mark (BNR-45) instruction treats a group mark in
the same manner as a record mark because both con-
tain 8 and 2 bits.
Execution Time. T
==
240 p.,sec if a branch occurs
(no group mark); T
==
200 p.,sec if a branch does not
occur.
Internal Data Transmission Instructions
The following instructions provide for the transmis-
sion of data from one core storage address to another.
Transmit Digit (TD-25)
Description. The single digit at the Q address is
transmitted to the
P
address. The digit at the
Q
address is not changed. A flag bit at the
Q
address is
also transmitted.
Execution Time. T
==
200 p.,sec
Transmit Digit Immediate (TDM-15)
Description. The single digit in the units position
of the Q part of the instruction (Ql1) is transferred
to the P address. The original digit in the units posi-
tion of the
Q
part remains unchanged.
In Figure 38, if the Transmit Digit Immediate
instruction (15 09400 00500) is at 09200, the digit
(0) at 09211 is transmitted to the core storage location
Core Storage
specified by the P address (09400). The 3 at 09400 is
replaced by the 0, which also remains in 09211.
If a flag bit is located at Ql1, it is also transmitted.
Execution Time. T
==
200 p.,sec
Transmit Field (TF-26)
Description. The data in the field at the
Q
address
is transmitted to the field at the P address. The data
in the field at the Q address remains unchanged by
the transfer.
Transmission proceeds serially from right to left
until terminated by the flag bit that marks the high-
order position of the field at the
Q
address. The
transmitted field replaces all data in the field at the
P address, including flag bits.
In Figure 39, the data (214) in the field defined
by the Q address (00500) replaces the data (128)
in the field defined by the P address (09400). The
data at the Q address is not changed.
Execution Time. The execution time varies accord-'
ing to the number of digits (high-order zeros in-
cluded) in the
Q
field.
T
==
160
+
40D
q
p.sec
Transmit Field Immediate (TFM-16)
Description. The description is the same as that for
Transmit Field except that the data in the
Q
part
of the instruction is used in place of the data at the
Q address.
Execution Time. T
==
160
+
40D
q '
p.,sec
~------------------------------------~-..~~
D}
Figure 38. Transmit Digit Immediate - Data Flow'
34