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NEC CP/M-86 - Page 151

NEC CP/M-86
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GSX-86: Graphics
for
the
APe
Output contrl(3)
contrl(5)
intout
ptsout
Number
of
output
vertices
Number
of
output
parameters
Array
of
output
parameters
Array
of
output
coordinates
The
operation
of
each function identifier (contrl(6) values 1-19)
is
described in the
following sections.
Inquire Addressable Character Cells
This
operation
returns
information
to
the calling
program
about
the
number
of
vertical (rows)
and
horizontal
(columns) positions where the
alpha
cursor
can
be
positioned
on
the screen.
Input
Output
Enter Graphics Mode
contrl(2)
contrl(6)
contrl(3)
intout(1 )
intout(2)
o
Function
ID
= 1
o
Number
of
addressable rows
on
the screen,
typicall y 24
(-1
indicates
cursor
address-
ing
not
possible).
Number
of
addressable columns
on
the
screen, typically
80
(-1
indicates
cursor
addressing
not
possible).
This
operation
causes the graphics device
to
enter
the graphics
mode,
if
it
is
different
than
the
alpha
mode.
It
is
used
to
explicitly exit
alpha
cursor
addressing
mode
and
to
perform
the transition from
alpha
to
graphic mode properly.
Input
Output
contrl(2)
contrl(6)
contrl(3)
o
Function
ID
= 2
o
9-19

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