Radio Shack Quick Printer II Quick Reference Manual

JOYSTK
(j)
Returns the horizontal or vertical coordinate
(/')
ot
the left
or right
joystick:
=
horizontal, left joystick
1
=
vertical, left joystick
2 horizontal,
right
joystick
3
=
vertical, right joystick
M=JOYSTK(0)
H=J0YBTK(K)
LEFTS (sir. length)
string.
P$=LEFT$IM* .7)
LEN
(str)
Returns
the
length of
a
string,
X=LEN(SENS
>
Returns
left
portion [length
characters)
of
Returns natural logarithm.
'
LOG (numeric)
Y=L0G<353)
MEM
Finds the
amount
of free memory
PR
I NT MEM
MIDS (str. pos.length) Returns
a
substring of another siring
starting at pos. If length is omitted, the entire string
right
of
position is
returned.
Ft^MIDtl A* .3)
?MID*( A* »3i2)
PEEK (location) Returns the contents of specified memory
location.
A=
PEEK <
32076)
POINT (x.y) Tests whether specified graphics cell is on or off. x
(horizontal) 0-63;y (vertical)
0-31
The value returned is -1 if
the
cell
is
in
a text character: mode:
il it is off. or
the
color
code
if
it is on
. See
CLS for color
codes.
IFPOINT(ll?.10)THENPRINT"ON"ELSEPRINT
"OFF
"
POS (device)
Returns
current
print
positi
printer,-2
=
display.
PRINT TAB<8) POS(0>
PPOINT (x.y) Tests whether specified graphics cell is on or off
and
returns
color code of
specified
cell.
PPOINT ( 13 .35)
device
RIGHTS (str.length)
ZIP*=RIGHT*< ADS
Returns right portion of string.
i5!
SGN (numeric) Returns sign of specified numeric expression:
-
1 if argument is negative
if argument
is
+
1 if argument is positive
X=SGN<A*B)
SIN (numeric)
Y
=
S I N
( 5 )
Returns
sine
of
angle given in radians.
STRINGS
(length.code or string) Returns
a
string
of
characters (of specified
length) specified by ASCI I
code
or
by
the
first character of the string.
'STRING* (5 ,"Z"
i
'STRING*(5
>91 )
STR$ (numeric) Converts
a
numeric
expression to
a
string
S*=STR«<" )
SQR (numeric) Returns the square root
of a number.
Y=SQR(5+3)
TAN
(numeric) Returns tangent of angle given in radians.
Y
=
TAN (AS, 7)
TIMER Returns
contents or
allows
setting of timer
(0-65535).
'TIMER
TIMER=0
tISRii
(numeric)
>!
=
USR<Y)
VAL (str) Converts
a
siring
to a number.
A
=
'.'AL<B*
)
VARPTR
(var) Returns address of pointer
to the
specified
variable.
Y
=
USR< VARPTR CO
)
Calls user's machine-language subroutine.
Control Keys
-
SHIFT
-
BREAK
CLEAR
ENTER
SPACEBAR
SHIFT
SHIFT e
Cancels last character
typed: moves cursor
back one space.
Erases current line
Interrupts anything in
progress and
returns
lo command level.
Clears the screen.
Signifies
end
of current
line.
Enters
a space (blank) character
and
moves cursor one
space forward.
Causes
currently
executing program
to
pause (press any key
to continue).
All-caps
upper-lowercase
keyboard switch. (Lowercase
displayed
as
reversed capitals.)
Special Characters
Abbreviation
for REM.
$
Makes variable
string type.
: Separates
statements on the same line.
? Same
as
print.
print
punctuation:
spaces
over
to the next 16-column print zone.
;
PRINT punctuation:
separates items in
a
print list
but does not add spaces
when they
are
output.
Error
Messages
Abbreviation
Explanation
Division by
AC
File
already OPEN
BS
Subscript
out of range
CN
Can't continue
DO
Redimensioned array
DN Device number error
DS Direct statement in
file
FC
Illegal function call
FD
Bad
file
data
FM
Bad file mode
I
J
Illegal
direct
IE Input
past end of file
I/O Input
Output
error
LS
String too long
NF
next without FOR
NO File not
open
0D
Out of data
DM
Out
of memory
OS Out of string
space
0Y
Overflow
RC RETURN without
GOSUB
SN
Syntax error
ST
String formula too complex
TM Type mismatch
UL
Undefined line

Radio Shack Quick Printer II Specifications

General

Brand	Radio Shack
Model	Quick Printer II
Category	Desktop
Language	English