Tandy color computer 8 basic Quick Reference Manual page 8

Commands
Commands
HGET
{sx,sy)-{ex,ey),buffer
Stores a rectangle that
is
on
the high-resolution
graphics screen
into
a buffer previously set
up by
the
HBUFF command
for
future
use by the
HPUT
command.
sx,sy
First
corner
of
rectangle
ex,ey Opposite corner
of
rectangle
buffer
Number
of
buffer
HGET
(21
f
32)-(28,37)
,1
HLINE
(x1,y1)-(x2,y2),c,a
Draws a
line
on the high-resolution
graphics
screen.
(x1,y1)
Starting point
of
line.
If
omitted the
line starts at
the
last
ending
point,
or
the center
of
the screen.
-{x2.y2)
Ending
point
of
HLINE.
c Defines color (Required).
PSET
selects current
foreground
color.
PRESET
selects current
background
color.
a Box
action (Optional).
If
omitted,
BASIC draws a
line.
If
B
is
used,
BASIC draws a
box,
using the
starting
and
ending
points
as
opposite corners
of
the box.
If
BF
is
used,
BASIC draws a
solid box.
HLINE
(22
f
33)-(100
f
90)
,3,BF
HPAINT
(x,y),c1,c2
Paints
an area on the high-resolution
graphics
screen.
x,y Starting point
d
Paint color
c2 Border
color
HPAINT (55,66)
,2,3
HPRINT
(x,y),message
Prints
message on
high-resolution
graphics
screen.
x,y
Starting
character
position
message
String to print
HPRINT (20,12) /'HELLO!"
HPUT
(sx,sy)-(ex,ey),b,a
Copies graphics from a
buffer
to
a rectangle
on
the high-resolution graphics
screen.
sx,sy
First
corner
of
rectangle
ex,ey Opposite corner
of
rectangle
b
Buffer
number
a
Action used. Actions include:
PSET,
PRESET AND,
OR,
NOT
HPUT <22,33)-(28,37)
,1
,PSET
HRESET
(x,y)
Resets a
point
on
the high-resolution graphics
screen
to
the
background
color.
HRESET (22,33)
HSCREEN mode
Selects
a
high-resolution graphics screen
mode.
Modes
1-4
also clear the high-resolution graphics
screen.
mode
Mode
number.
Mode
numbers
are:
—
Low
resolution
1
—
320 X
192, 4-coior
2
-
320 X
192, 16-color
3
—
640 X
192, 2-color
4
—
640 X
192, 4-color
HSCREEN
4
HSET
(x,y,c)
Sets
point x,y
on
the high-resolution graphics
screen
to
Color
c.
If
you omit
c,
BASIC
uses
the
foreground
color.
HSET (22,33,2)
HSTAT
v1,v2,v3,v4
Returns information regarding the
high-resolution
text
screen cursor
to
variables v1,v2,v3,
and
v4.
v1
Character
code
v2 Character
attribute
v3 Cursor X
coordinate
v4
Cursor
Y
coordinate
HSTAT C,A,X,Y
IF test
THEN
m
ELSE
02
Performs a
test.
If
the
results
are
true,
the
computer
executes the
first
instruction
(#1).
If
the
results
are
false,
the
computer
executes the
second
instruction
(#2).
IF
A<N THEN PRINT "A<N" ELSE PRINT "A>
=
N"