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Radio Shack TRS-80 Model 4 - Page 292

Radio Shack TRS-80 Model 4
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SYSTEM
Sample Program
10
A$="ONE
":B$="ALL ":C$="FOR "
20
PRINT
A$
C$ B$
30
SWAP
A$t
B$
a0
PRINT
A$
C$ B$
RUN
ONE
FOR
ALL
ALL
FOR
ONE
ISYSTEM
["command'1
Statement
I
Returns you to TRSDOS level.
Command tells the system
to
execute the specified TRSDOS
command and immediately return to BASIC. Your program and
variables are not affected. If command
is
a constant, it must be
enclosed
in
quotes. You can specify only the TRSDOS library
commands, not the utilities.
If you omit command, SYSTEM returns to the TRSDOS Ready mode.
Your resident BASIC program is not retained
in
memory.
NOTE: You cannot call DEBUG from BASIC.
Examples
SYSTEM
returns you to TRSDOS. Your resident BASIC program is lost.
SYSTEM
"OIR"
runs the TRSDOS command, DIR (print directory); then returns to
BASIC. Your resident BASIC program remains intact.
2-166

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