IBM 5475 Maintenance Manual page 16

Elastic diaphragm encoded keyboards
Table of Contents

Advertisement

Counter
~~c~o_u_n_t_l _ _ _
--1-r--r------------lr-------i
Count 2
.-----i~ Clo~
Reset
Tl
---~N
i
Count 4
Spec
Count 8
Count
16
Count
32
Switch M1-at-r-ix- . ..
-----~------------
. ..
-=--=--=-~-=-~-1~·1--S-ca_n_C
I . . .
~
. . . . ,
p_l_e_te _ ___,
-
1~~
r
,
"
~
>I
~
"?
. - - - - - - - 1
Bit D
+-t-t--+--
1----+-~-1-+-<~+-!4.-'4~+"4'!:
4-7
J
R
Spec
>I<
~
>I<
I<
>I
>
~
>i~>
!<~>+<
&
>+<
>i
)'-
>+<>+<
~
R
Bit C
...______.
"r'
7
lo.I
'"" '""'
'--~~~~1-+-+-Hl-f---IEl-----f:-i-·~G_a_te~-+--+--~---a~]
R
~1----------'
J
-
R
Bit B
Bit A
Shift
~ROS
Bitl
-------1
256X4
- - - - - B i - t -
2
Bit 4
Bit 8
Error
Scan Complete
A
1-----------11~1------A_n_y_D_a_ta_(D_a_t_a_A_v_a_il_a_b_le_)
- - - - - - i N . _ _ _ _ _ _ ___.
Delayed Bail Forward
Figure 1-17. Encode Circuits (New Style Encode Board)
Elastic Diaphragm Enc Kybds and 5475 Data Entry Kybd
(3/71)
1-11

Advertisement

Table of Contents
loading

Table of Contents