Command Words - GE DATANET-30 Programming Reference Manual

Command Words
The table below shows the digits used for specifying each tape handler:
Handler
Corrnnand
Word
0 1
2 3
4 5
6
7
1st
Word
O.Q.OY 1 0P
O.Q.OY10P
O.Q.OY 1 0P OlOY10P 01,0Y10P
01,0Y 1 0P 01,0Y 1 0P
Ol,OY 1 0P
2nd Word
Y
2 MMMMM
Y
2 MMMMM
Y
2 MMMMM Y 2 MMMMM Y 2 MMMMM Y 2 MMMMM Y
2
MMMMM
Y 2
MMMMM
3rd Word
lNNNNN
..f.NNNNN
iNNNNN
QNNNNN
lNNNNN
..f.NNNNN iNNNNN .Q.NNNNN
Y 1 Y 2 are the octal digits for the different tape instructions. The. numbers underlined
are used for specifying the handler number.
P is the plug number of the tape controller.
M is the address being written out of or read into memory.
N is the number of words being read or written - that is, record length. For example:
I~struction
RTB
The 3 command
words from "Octal
Code" column.
Tape Handler
3
{
OT020P
5MMMMM
TNNNNN
Plug
2
=
~010202
=
500200
=
~000400
From table above
'-....,,--J
number of words
being read or written
[ID/A\lf
&~~lf CJ~@------------
V-48