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TECHNICAL DATA
NOTE: The following material is for those
of the KB 5150. This data does not apply
who are interested in the technical areas
to normal operating requirements.
POWER
REQUIREMENT
+5VDC
@
250ma Nominal
KEYBOARD
CODES
The diagram below shows the codes
output
by the KB 5150 on key actuation. This
is
a dual encoded scheme,
meaning that each
key depression/release produces a
"Down"
and "Up" code cycle.
38
3C
BB
BC
3D
3E
ED
EE
3F
40
SF CO
41
42
C1
C2
43
44
C3 C4
CODE CHART
KEY LOCATIONS
Correlation of key codes to their location
on the schematic matrix is as follows: The
key numbers run from left to right
across
the diagram. Exception: Numbers 16 and 54
are not used in this configuration.
The top code is the "Down" value,
and the
bottom code is the "Up" value. These codes
are based on positive logic and a negative
strobe.
KB 5150
45
46
C5
(»
47
48
49 4A
C7
C8 C9 CA
4B
4C 40 4E
CB CC CO CE
4F
50
51
00 01
1C
53
9C
D3
The top row is thus Keys 1 through 19. The
second Keys 20 through 39, the Home Row 40
through 59, the fourth 60 through 79,
and
the bottom row 80 through 86.
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