Sharp MZ-800 - Page 183

Machine language program control statements
INP@
INP@$E8,A
Substitutes
data
at
port
number
$E8
for
variable
A.
oOUuT@ OUT@$E8,A Outputs variable A to port number SE8.
LIMIT
100
LIMIT
49151
Limits
the
area
used
by
the
BASIC
program
to
the
49151
address
(BFFF
with
hexadecimal
notation).
100
LIMIT
A
Limits
the
area
used
by
the
BASIC
program
to
the
address
of
varia-
ble
A.
100
LIMIT
$BFFF
Limits
the
area
used
by
the
BASIC
program
to
the
address
BFFF
in
hexadecimal
notation.A
hexadecimal
notation
is
indicated
by
a
‘*$””
mark
before
the
notation.
300 LIMIT MAX Returns the area used by the BASIC program to the maximum
memory.
POKE
420
POKE
49450,
Sets
data
175
(decimal
notation)
to
the
decimal
notation
address
175
49450.
130
POKE
AD,
Sets
the
value
(0
to
255)
indicated
by
variable
DA
to
the
address
DA
specified
by
variable
AD.
PEEK
150
A=PEEK
Changes
the
data
at
decimal
notation
address
49450
to
a
decimal
(49450)
number,
and
substitutes
for
variable
A.
160
B=PEEK
(C)
Changes
data
entered
at
the
decimal
notation
address
specified
by
variable C to a decimal notation, and substitutes for variable B.
USR
500
USR
(49152)
Moves
program
control
to
decimal
address
49152.
This
control
mov-
ement has the same function as the machine language CALL com-
mand. As a result, when the RET command (201 at decimal nota-
tion) is in the machine language program, returns to the BASIC
program.
550 USR (AD)
Calls the decimal address specified by variable AD.
570 USR ($C000)
Calls the hexadecimal address C000.
Printer control statement
AXIS Valid in GRAPH mode.
30 AXIS 0, —10, Adds a scale of 48 graduations in increments of 10 to the Y-
48 coordinate axis from the current pen position.
50 ASIX 1, 10, Adds a scale of 48 graduations in increments of 10 to the X-
48 coordinate axis from the current pen position.
CIRCLE Valid in GRAPH mode.
50 CIRCLE 0, 0, Draws a circle (radius 240) from coordinates (0,0).
240, 0, 360,
0, 2
GPRINT Valid in GRAPH mode.
30
GPRINT
(2,2),
Prints
the
character
A
upside
down
at
the
size
of
the
26-digit
mode
ane of the TEXT mode.
HSET
30
HSET
Specifies
the
current
pen
position
to
a
new
starting
point.
(Valid
in
GRAPH mode.)
LINE Valid in GRAPH mode.
10 LINE% 1, 240,
0, 240, —240,
0, — 240, 0, 0
Coordinates (240,0), (240, — 240), (0, — 240) and (0,0) are connected
by a solid line from the current pen position.