Unitech PT600, Programming Reference Manual

Page: 28 / 77

{
case 0 : break;
case 1 : cc=cc|0x04; break;
case 2 : cc=cc|0x0c; break;
}
switch (stop)
{
case 1 : break;
case 2 : cc=cc|0x02; break;
}
switch (data)
{
case 7 : break;
case 8 : cc=cc|0x01; break;
}
regs.h.ah = 0x1C;
regs.h.bh = 1;
regs.h.al = cc;
int86(0x21,&regs,&regs);
}
1C Software Control Flow
Entry Parameter: AH = 1CH
BH = 2
AL = 0 ; Enable XON/XOFF control flow
1 ; Disable XON/XOFF control flow
Return Value: None
Note: Only for NONE communication protocol
Example
:
void TC_flow_ctrl(int status)
{
if (status == 0)
// Set flow control to none
{
regs.h.ah = 0x1C;
regs.h.bh = 2;
regs.h.al = 1;
int86(0x21,&regs,&regs);
regs.h.ah = 0x1C;
regs.h.bh = 3;
regs.h.al = 1;
int86(0x21,&regs,&regs);