Unitech PT600, Programming Reference Manual

Page: 45 / 77

{
regs.h.ah= 0x30;
regs.h.al= 0;
int86(0x21,&regs,&regs);
*ver = regs.h.al * 100 + regs.h.ah;
*firm= regs.h.cl * 100 + regs.h.ch;
*oem = regs.x.bx;
return(regs.h.al * 100 + regs.h.ah);
}
35 Get Interrupt Vector
Entry Parameter: AH = 35H
AL = interrupt number
Return Value: DS:BX = address of interrupt routine
Example :
void TS_get_interrupt_vector(int vect,unsigned int *es,unsigned int *bx)
{
regs.h.ah= 0x35;
regs.h.al= (unsigned char)vect;
int86x(0x21,&regs,&regs,&segregs);
*es = segregs.es;
*bx = regs.x.bx;
}
36 Get Free Disk Cluster
Entry Parameter: AH = 36H
Return Value: AX = 1 (number of sectors per cluster)
BX = number of available clusters
CX = 1024 (number of bytes per sector)
DX = number of total clusters in RAM disk
Example:
long TS_free_disk(int drive)
{
regs.h.al = (unsigned char)drive;
regs.h.ah = 0x36;
int86(0x21,&regs,&regs);
return((long)regs.x.bx*(long)regs.x.cx);
}