Unitech PT630, Programming Reference Manual

Page: 9 / 73

PT630 Programming Reference Guide Page 9 of 59
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1.4 LCD Control Functions ( INT 10H )
1.4.1 Clear LCD Screen
Entry Parameter: AH = 0
Return Value: None
Example :
void TL_clrscr()
{
regs.h.ah= 0;
int86(0x10,&regs,&regs);
}
1.4.2 Enable/Disable Screen Scroll
Entry Parameter: AH = 1
AL = 0/1 ; disable/enable screen scroll
Return Value: None
Example :
void TL_scroll(int status)
{
regs.h.ah = 1;
regs.h.al = (unsigned char)status;
int86(0x10,&regs,&regs);
}
1.4.3 Set Cursor Position
Entry Parameter: AH = 2
DH = Row
DL = Column
PT630
6x8 8x16
Row 0~7 0~3
Column
0~19 0~15
Return Value: None
Example :
void TL_gotoxy(int x,int y)
{
regs.h.ah = 2;
regs.h.dh = (unsigned char)y;
regs.h.dl = (unsigned char)x;
int86(0x10,&regs,&regs);
}