This is a seemingly worthless but none the less important tutorial on moving the cursor to the next line.
This code will move the cursor to the new line.
#define B_CALL(xxxx) rst 28h \ .dw xxxx #define B_JUMP(xxxx) call 50h \ .dw xxxx _homeup =4558h _newline =452Eh _clrlcdfull =4540h .org 9D95h B_CALL(_clrlcdfull) B_CALL(_homeup) ;Call up the home screen B_CALL(_newline) ;Move cursor to next line ret ;Return home .end END
The screen should look like this after you run the program:
As you can see, there is an empty line on the top of the screen followed by a "Done" message and the blinking cursor on the next line. If it weren't for the "Done" message, the cursor would have been on the preceding line. The point is, the cursor isn't on the "First line". But rather on the next "empty" one.
_newline - sets the cursor on the next "empty" line.
Did you know there is actually a ROM call that displays the "Done" message on the screen? Well that call is _DispDone (_DispDone = 45B5h). Try it out.Tutorial 7