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SCN
0
(blank)
0
RRT
C
(blank)
Y
WRT
C
(blank)
Y
D A T A N E T - 1 5
I N S T R U C T I O N S
Mnemonic
Operand
Index
Time
Oper. Code
Address
Word
Microsec.
Description
-
SE L
P
24-36
SELECT. Selects the DATANET-15 connected to Con-
t r o l l e r Selector plug P .
RRM
C
36
RECEIVE REMOTE MESSAGE.
Sets receive mode
(blank)
Y
36
without affecting any other controller functions. In-
cludes starting address in memory (Y) and maximum
number of characters to be received (C).
WRT
C+S
36
WRITE REMOTE MESSAGE. Positions DATANET-15
(blank)
Y
36
to c o r r e c t station address, switches i t to the transmit
mode, and initiates transmission of data from GE-235
Computer memory.
12
P l a c e s DATANET-15 in receive mode and scanning.
12
36
READ REMOTE TAPE.
T u r n s DATANET-15 to not
36
ready status, turns P a p e r Tape Reader on, and initiates
the reading of paper tape.
Includes the starting
memory a d d r e s s and the maximum message length.
36
WRITE REMOTE TAPE.
Turns the DATANET-15
36
to the transmit mode, positions the scan counter on
station number 00, gives the starting memory a d d r e s s
from which data i s to be removed, and controls the
/
-----
maximum message length.
The following illustration shows the DATANET-15 command words a s they appear in the GE-235
Com?uter memory.
The Select command words which precede the DATANET-15 commands a r e
not shown.
Command Word 1
Bits
0
1 2
3
4
5
6
7
8
9
10
11 12
1 3 14
15
16
1 7
18
19
S e t T r a n s m i t M o d e
1
0
0
0
0
C C C C C
C
C
C
C
C
C
S
S
S
S
Set Receive Mode
O l O O O C C C C C C C
C
C
C
C
0
0
0
0
Start Scanning
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Read P a p e r Tape
0
1
0
1
0
C
C
C
C
C
C
C
C
C
C
C
0
0
0
0
P u n c h P a p e r T a p e
1
0
0
0
1
C C C C C
C
C
C
C
C
C
0
0
0
0
Command Word 2
Bits
0
1
2
3
4
5
6
7
8
9
1 0
11 12
13 1 4
15
16
17
18
19
0 0 0 0 0 0 Y Y Y Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
y
S
=
Station Address; 0-15
C
=
Character Count; 1-2048
Y
=
Beginning memory location for
(must be 2's complement)
input o r output message.
XI-4
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