minix/lib/syslib/sys_in.c

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2005-04-21 16:53:53 +02:00
#include "syslib.h"
/*===========================================================================*
* sys_in *
*===========================================================================*/
PUBLIC int sys_in(port, value, type)
int port; /* port address to read from */
unsigned long *value; /* pointer where to store value */
int type; /* byte, word, long */
{
message m_io;
int result;
m_io.DIO_REQUEST = _DIO_INPUT | type;
2005-04-21 16:53:53 +02:00
m_io.DIO_PORT = port;
result = _taskcall(SYSTASK, SYS_DEVIO, &m_io);
*value = m_io.DIO_VALUE;
return(result);
}