Unitech PT600, Programming Reference Manual

Page: 47 / 77

3E Close File with Handle
Entry Parameter: AH = 3EH
BX = Handle of file
Return Value: if success, CARRY flag is cleared
if failed, CARRY flag is set
Example:
void TS_close_file(int hdl)
{
regs.h.ah= 0x3e;
regs.x.bx= hdl;
int86(0x21,&regs,&regs);
if ((regs.x.cflag & 0x01) == 1) return(-1);
else return(1);
}
3F Read File with Handle
Entry Parameter: AH = 3FH
BX = Handle of file
CX = number of bytes to read
DS:DX ; pointer to data buffer
Return Value: if success, AX = number of bytes read and CARRY
flag is cleared,
data in buffer
if failed, AX = 6 and CARRY flag is set
Example:
int TS_read_file(int hdl,int cnt,char *str)
{
segregs.ds = FP_SEG(str);
regs.x.dx = FP_OFF(str);
regs.h.ah=0x3f;
regs.x.cx=cnt;
regs.x.bx=hdl;
int86x(0x21,&regs,&regs,&segregs);
if ((regs.x.cflag & 0x01) == 0) return(regs.x.ax);
else return(-1);
}
40
Write File with Handle