Description Keyboard Interface Circuit - Radio Shack TRS-80 PT-210 Service Manual

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Description of Keyboard Interface Circuit
Key Board
LINE FEED
Â¥
1
ESC
I
-D
BACK SPACE
1
-m
I
RETURN
I -
PAPER ADV
1 -
Key
Matrix
I
SPEED
t
I
SHIFT
1
I
CTRL
1
-
Control --
Key
Board
nterface
S379C-5
-
MODE M
Figure 17.

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