IBM 1620 Manual page 58

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put, resulting from
PUNCH, PUNCH TAPE, PRINT,
and
TYPE
statements is not in-
hibited. The output format of the trace data is E14.8 for floating point results
and 15 for fixed point results.
With the modifications shown below, the trace output can be obtained in
cards, except in the printer-oriented system.
Su broutine Set 1
Card number
Columns
Standard
Change to
30126
54-55
95
47
30127
6- 7
96
48
Subroutine Set 2
Card number
Columns
Standard
Change to
30124
54-55
95
47
30125
6- 7
96
48
Subroutine Set 3
Card number
Columns
Standard
Change to
30130
30-31
95
47
42-43
96
48
Subroutine Set 4
Card number
Columns
Standard
Change to
30135
30-31
95
47
42-43
96
48
Note that program switch 4 serves a dual function during execution of the
object program: i.e., provision of trace data and correction of input data incor-
rectly entered at the console keyboard. Thus, when running in the trace mode,
you must turn off program switch 4 before typing output data. Following the
entry of the last item on the input list (after pressing the release key), press
8IE
two or three times, turn the switch on, and press the start key.
(If a trace routine
is desired, switch 4 cannot otherwise be used in the program.)
Operating Principles
57

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