mirror of
https://github.com/RevCurtisP/C02.git
synced 2024-11-18 21:07:28 +00:00
46 lines
1.8 KiB
Plaintext
46 lines
1.8 KiB
Plaintext
Screen Control Functions for C02
|
|
|
|
This module contains functions for screen and cursor manipulation.
|
|
|
|
The accompanying assembly code vary by platform, so when invoking the
|
|
cross-compilers, the command line option -s must be used to ensure that
|
|
the correct header files are included.
|
|
|
|
At the beginning of the program use the directives
|
|
|
|
#include <screen.h02>
|
|
|
|
The following functions should be defined:
|
|
|
|
clrscn(); Clears the screen and returns the cursor to the home
|
|
position.
|
|
|
|
Returns with no action if the platform does not
|
|
support the clear screen action.
|
|
|
|
crsrhm(); Moves cursor to home position (upper left corner
|
|
of the screen).
|
|
|
|
Returns with no action if the platform does not
|
|
support cursor positioning.
|
|
|
|
setpos(c,r); Moves cursor to column c on row r. The topmost row
|
|
and leftmost column are numbered 0.
|
|
|
|
Returns with no action if the platform does not
|
|
support cursor positioning.
|
|
|
|
c,r = getpos(); Returns the current row and column of the cursor. The
|
|
topmost row and leftmost column are numbered 0.
|
|
|
|
Note: Returns 255 for both the width and height if
|
|
the platform does not support cursor positioning.
|
|
|
|
w,h = getsiz (); Returns the current screen or window width and height
|
|
in rows and columns.
|
|
|
|
Note: Returns 255 for width and/or height if either or
|
|
both are cannot be determined via software. Since all
|
|
supported platforms have less than 128 screen rows and
|
|
columns, the :- test can be used on these values.
|