minix/lib/syslib/sys_voutb.c

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#include "syslib.h"
/*===========================================================================*
* sys_voutb *
*===========================================================================*/
PUBLIC int sys_voutb(pvb_pairs, nr_ports)
pvb_pair_t *pvb_pairs; /* (port,byte-value)-pairs */
int nr_ports; /* nr of pairs to be processed */
{
message m_io;
m_io.DIO_REQUEST = _DIO_OUTPUT | _DIO_BYTE;
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m_io.DIO_VEC_ADDR = (char *) pvb_pairs;
m_io.DIO_VEC_SIZE = nr_ports;
return _kernel_call(SYS_VDEVIO, &m_io);
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}