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Radio Shack TRS-80 Model 4 - Page 25

Radio Shack TRS-80 Model 4
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STOP
Slops program execution.
STOP
STRING$(number,
character)
Returns a string of the specified number of characters.
The
number must
be
from 0 to 255. The character
is
a
string
or
an
ASCII code.
B$
= STRING$125, "X")
PRINT
STRINGI50.
10)
STR$(number)
Converts
number into a string. If the numberis
positlve, STR$ places a blank before the string.
SWAP
varialJlel.
variable2
Exchanges the values of two variables.
SWAP
F1#,
F2#
SYSTEM
[command]
Returns to TRSDOS. If you specify a command,
TRSDOS executes it and returns you to BASIC.
SYSTEM
SYSTEM
"DIR"
TAB
(n
umber)
Spaces to position number on the display. The number
must be from 0 to 255.
PRINT
A$
TA6(25)
B$
TAN(number)
Computes the tangent
of
number. The number must
be
in
radians. If it is in degrees, use
TAN
(number'
."11745329). The result is always single precision.
PRINT
TANI7.8G)
TIME$
Fi:eturns
the time (in 24-hour format>.
A$
=
TIME$
TROFF
Turns off the trace function.
TROFF
TRON
Turns on the trace function (to follow program flow).
TRON
US.R[digit] (expression)
Calls the user's assembly-language subroutine
identified by
digit and passes the result of expression.
)-(
USR5
(Y)
?A

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