Below is a source code example modifying DOS curtime.c example to use free IODLL library.
Web link for IODLL is http://www.geekhideout.com/iodll.shtml
There is also a product called TVicHW32:
http://www.entechtaiwan.com/dev/hw32/faq.shtm
// curtime.cpp : Defines the entry point for the console application.
// curtime.c 13nov95 demonstrates reading current time from PC104-SG
#define BASE 0x300
#include "stdafx.h"
#include "104sgdef.h"
#include "sgdpdef.h"
#include
#include
#include
#include
#define MAXMODULE 50
typedef void (WINAPI*cccfunc)(short int Port,char Data);
typedef char (WINAPI*ccfunc)(short int Port);
ccfunc PortIn;
cccfunc PortOut;
/* void PortOut(short int Port, char Data);
void PortWordOut(short int Port, short int Data);
void PortDWordOut(short int Port, int Data);
char PortIn(short int Port); */
short int PortWordIn(short int Port);
int PortDWordIn(short int Port);
void SetPortBit(short int Port, char Bit);
void ClrPortBit(short int Port, char Bit);
void NotPortBit(short int Port, char Bit);
short int GetPortBit(short int Port, char Bit);
short int RightPortShift(short int Port, short int Val);
short int LeftPortShift(short int Port, short int Val);
short int IsDriverInstalled();
int Read_Dual_Port_RAM(char addr);
int main(int argc, char* argv[])
{
#define BASE 0x300
int i;int timechar[9];
HINSTANCE hLib=LoadLibrary("IO.DLL");
if(hLib==NULL) {
cout << "Unable to load library!" << endl;
getch();
return(0);
}
char mod[MAXMODULE];
GetModuleFileName((HMODULE)hLib, (LPTSTR)mod, MAXMODULE);
cout << "Library loaded: " << mod << endl;
PortIn=(ccfunc)GetProcAddress((HMODULE)hLib, "PortIn");
PortOut=(cccfunc)GetProcAddress((HMODULE)hLib, "PortOut");
if((PortIn==NULL) || (PortOut==NULL)) {
cout << "Unable to load function(s)." << endl;
FreeLibrary((HMODULE)hLib);
return(0);
}
while (1)
{
for (i=0;i<=8;i++)
/* always read Usec1_Nsec100_Port first, latching hi-order ports */
/* Then, other current time ports can be read */
/* partially or completely in any order */
/* this example reads ALL the current time ports, and then displays them */
{timechar[i]=PortIn(BASE+Usec1_Nsec100_Port-i);}
for (i=8;i>=0;i--)
{printf("%02x " ,timechar[i]&0x0ff);}
i=Read_Dual_Port_RAM(DP_Extd_Sts);
printf("DP Extd status: %2x \n",i);
}
FreeLibrary((HMODULE)hLib);
return (0);
}
int Read_Dual_Port_RAM(char addr)
#define BASE 0x300
{
char response;
response=PortIn(BASE+Dual_Port_Data_Port); /* clear response flag */
PortOut((short int)(BASE+Dual_Port_Address_Port) ,addr);
while ((PortIn(BASE+Extended_Status_Port)&Response_Ready) ==0) {;}
response=PortIn(BASE+Dual_Port_Data_Port);
return response;
}
