Color Computer
MICRO-
COMPUTER
M
Start-Up
1
.
Turn the television
sel ON.
2. Select channel
3
or
4.
3. Set the Antenna
Switch to COMPUTER
4.
Turn on any accessory
equipment
(e.g., a
printer).
5. If you're using
a
Program
Pak
"
. insert it now, betore turning
on
the
Computer.
6. Turn the Computer
ON.
7. If
you're not
using
a Program Pak'". the Color
BASIC or
Extended Color BASIC start-up
message
will
appear
on
the TV.
followed
by: OK
The Computer is
now ready to use.
Note: Information pertaining
to Extended Color
BASIC only is
shaded
like
this
paragraph.
Non-shaded information perlains
to
both Extended and
non-Extended Color BASIC.
Radio
/hack
The
biggest
name in
little
computers
Copyright 1981
by
Radio Shack.
A
Division
of Tandy Corporalio
1
Video
Control
Codes
Dec Hex
PRINT CHR$ (code)
8
08 Backspaces and erases current character.
13
0D Line feed
with
carriage
return.
32
20 Space
Operators
Each operator
or
group
of operators is
precedent over
the
group
below it.
Exponentiation
-,+ Unary
negative,
positive
*,/
Multiplication, division
+
.-
Addition and concatenation, subtraction
<,>,
=
,<
=
,>
=
,<>
Relational tests
NOT
AND
OR
Graphic Character
Codes
Given the color
(1-8) and the pattern (0-15). this formula will
generate the correct code:
code
=
128
+
16
•
{color
-1) *
pattern
I
'1
1
I 'I
I I I
IS] I
12
I
13
I I
14 I I
15 I
For
example to print pattern
9
in
blue (code
3), type:
C= 126+16* (3-1)
+9
"
CHRJ
(C)
m]
Functions
Argument
ranges are indicated
by special symbols:
numeric: (-10
3B
. W
38
)
x: (0-255)
y:
(0-191)
location:
(0-65535)
code: (0-255)
str: string argument
var. variable name
ABS (numeric)
Y=ABS(5)
Computes absolute value.
Returns ASCII
code
of
first character of specified
ASC (str)
string.
A
..'
i.
I.
ATN
(numeric)
Y=ATN(X/3)
CHR$ (code)
code
? CHR$
(
191 )
II l '-"I
i
I
COS (numeric)
Y
=
C0S<7)
EOF (I) ReturnsFALSE(0)ifthereismoredata:TRUE(-1)if
end of file
has been read For
cassette,/
1. for keyboard,
/
0.
E0F=<-1 )
EOF(fl)
EXP
(numeric)
/—numbtir\
Returns arctangent in
radians.
Returns character
for ASCII, control, or
graphics
Returns cosine of an angle given in radians.
Returns natural exponential
of number
Returns truncated (whole number)
value.
FIX (numeric)
Y
*
F I X ( 7 , 6 I
HEXS
(numeric) Computes
hexadecimal value.
PRINTHEXt
(30)
Y
=
HEX! (X/16)
INKEYS Checks
the keyboard and returns the key being
pressed (if
any).
A$=INKEY*
INT (numeric)
X=INT(5.2)
Converts
a
number
to
an integer
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