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f
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TAPE
WRITE
ROUTINES
These routines are used in MOl 860. The routine
numbers are the numbers used in MOl 860.
XS
in
the
chart mean any number.
Routine
Number
Description
BT01
BT02
BT03
Average Velocity Test - Positions
the tape
to
the file containing 1's
and then begins the
bit
timing
analysis test.
Acceleration Test - Checks the
speed
of
the tape
from
stop
to
1500 bits after the tape
has
reached
20
inches per second.
Deceleration Test - Checks the
speed
of
the tape
for
the 1040 bits
after the drop
of
the run line. This
speed should be less than 20
inches per second. \
Expected
Information
xxxx
XXXX
Average Deviation
Velocity Number
xxxx
Graph
xxxx
Graph
Error
Code
Meaning
The average speed is computed
to
two
decimal points and returned
as
a
4-digit
decimal number in inches per
second. For example, a received
number
of
4006 is actually 40.06
inches per second. The average
speed is taken from the average
of
9,192 bit times. The deviation number
is returned
as
the third and fourth
bytes.
The speed at bit 800 is computed
to
two
decimal points and returned.
as
a
4-digit
decimal number
in
inches per
second.
If
the speed is not within the
range
of
38.1
to
41.9 inches per
second
for
bits 800
to
1500, then that
speed
is
returned.
The speed
of
the 1500 bits is
displayed
in
a graph. The speed
in
inches per second is the vertical axis
and the 1500 bits are the horizontal
axis.
Each
asterisk (*) on the graph
represents the average speed
of
36
bits on tape.
The speed at bit 1040
is
returned
as
a
4-digit
decimal number computed
to
two
decimal points in inches per
second.
A graph
of
the speed
of
the 1040 bits
is displayed. The speed
in
inches per
second is the vertical axis and the
1040 bits are the horizontal axis.
Each
asterisk (*) on the graph
represents the average speed
of
26
bits on tape.
Diagnostic Program Routines 3-47
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