Unitech PT630, Programming Reference Manual

Page: 46 / 73

PT630 Programming Reference Guide Page 46 of 59
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1.5.31 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);
}
1.5.32 Run specified program
Entry Parameter: AH = 4BH
AL = 3
DS:DX ; pointer toprogram name
Return Value: if success, AX = Handle and CARRY flag is cleared
if failed , AX = 2 and CARRY flag is set
void TS_Run(char far *str)
{
regs.h.ah=0x4b;
regs.h.al=3;
segregs.ds=FP_SEG(str);
segregs.x.dx=FP_OFF(str);
int86x(0x21, &regs, &regs, &segregs);
}
1.5.33 End Program
Entry Parameter: AH = 4CH
AL = program-defined return value
Return Value: None
Example
:
void TS_end_program(int ret_code)
{
regs.h.ah=
0x4C;
regs.h.al= (unsigned char)ret_code;
int86(0x21,&regs,&regs);
}