HP 13255 Technical Information page 14

tJ2~5
13255-91032/t2
CartrIdge Tape Module Rev AUG-Ol-76
Table 5.0 Module Bus Pin Assignments
============================:===================================================
Function
Bus
Performed: Read Data From CTU
Valu~
Signal
_
...
_
......
-
...
-
---------------
-
......
....,~---
------------
X ADDR 15
Poll Bit: Bit 7
X
AD DR 14
X
ADDR 13
~odule
Address: (ADOR 11,10,9,4)
=
(1011)
X
ADDR
12
1
ADOR
11
0
AD OR
10
1
ADOR
9
~unction
Specifier: ADDR5 = 1
X
AllOR
R
X
AD DR 7
X ADDR 6
Data Bus Bit Interpretation:
1
ADDR
5
1 ADOR
4
X
ADOR 3
B7 Data Bit 7
X
ADOR
2
(Most significant bit of data)
X
.ADOR
1
X
AODR
0
......
_----
...
--_
..
--
.....
_
...
-
....
--_
........
-
----.-.-
.....
~
...
.-
.....
Ab
Data Bit 6
87
BUS
7
86
BUS 6
85
BUS
5
8~
Data Ait
5
84
BUS 4
83
RUS
3
82
BUS
2
64
Data Bit 4 1:)1
BUS
1
BO
BUS
0
-------~~~-~---~----
~-
...
~-~---~-~---~--~-
BJ
Data Bit
3
I=Logical l=BUS Low
O=Logical O=Bus High
IX=Don't Care
-------~---------~---
----~-------~--------
82
Data Bit
2
B1 Data Bit
1
80
Data Bit 0
lLeast significant bit
Of
data)
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