Unitech PT600, Programming Reference Manual

Page: 52 / 77

Example :
int TS_free_mem(unsigned char far *str)
{
unsigned long aa;
regs.h.ah=0x49;
segregs.es=FP_SEG(str);
int86x(0x21,&regs,&regs,&segregs);
if ((regs.x.cflag & 0x01) == 0) return(1);
else return(-1);
}
4A Modify Allocated Memory Block
Entry Parameter: AH = 4AH
ES = segment address of the block to resize
BX = new block size in paragraphs (16 bytes)
Returned Value: if success , CARRY flag is cleared
if failed , CARRY flag is set
AX = error code
Example
:
int TS_modify_alloc_mem(unsigned int size,unsigned char far *str,int
*free)
{
unsigned long aa;
regs.h.ah=0x4a;
regs.x.bx=size;
segregs.ds = FP_SEG(str);
int86(0x21,&regs,&regs);
*free = regs.x.bx;
if ((regs.x.cflag & 0x01) == 0) return(1);
else return(-1);
}
4C End Program
Entry Parameter: AH = 4CH
AL = program-defined return value