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Radio Shack TRS-80 PC-4

Radio Shack TRS-80 PC-4
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Using the value
of
this numerical expression, a position on the display
can
be
designated
as
the starting place
for
data
to
appear.
The method
for
counting the positions on the display
is
shown below.
[J
[J
DD
DD
DUD
I
RUN
I
Ii
1"1
I
I,
"
1
L-.J
U
I
e
Example:
2
3
4
5
r-I
I
LJ
6
7
8 9 1 e
1 1
PRI
NT
A (make A=12345)
PRINT
CSR
1;
A
PRINT
CSR
5;A
PRINT
B$
(make
B$
=ABCDE)
PRINT
CSR
2;
B$
PRINT
CSR
10;
B$
12345
12345
12345
j---------,-,~----
ABCDE
-
ABCDE
AS
1---'------------
ABCDE
*
If
a " , " (comma)
is
used
instead
of
a
/I;"
(semicolon)
following
the CSR
function,
the display
will
be
cleared once and then successive displays wi
II
begin
from
the
left
by
using the
II
Key.
5-6-3 Jump Command
GO
TO
statement
A GOTO statement, also called
an
"unconditional
jump",
causes
program execution
to
continue at designated location (line number)
unconditionally.
Format: GOTO {
numeric~1
expressio~
line number
(1
through 99991
# numerical expression program
area
number
(0 through
9)
When a numerical expression
is
written
immediately
following
the GOTO statement,
program execution jumps
to
a line number. When a
"#"
is
written
immediately
following
the GOTO statement, program execution jumps
to
a program area.
The numerical expression may
be
a numerical value, a variable or a calculation formula.
Example:
GOTO
10'
GOTO
N
.........
jump
to
line 10
.........
jump
to
the line number which
is
the value
of
variable N
(jump
to
line 30
if
N
is
30)
-47-

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