SVR5 and SCO OpenServer 5

RelReqIO(D4pccard)

RelReqIO -- describes I/O addresses for 16-bit PC Cards

Syntax

   #include <sys/lcs.h>
   #include <sys/lss.h>

Description

The RelReqIO structure is used by the ReleaseIO(D3pccard) and RequestIO(D3pccard) services to request or release I/O addresses. Only the CardService database resources are adjusted by this service.

Structure definition

   unsigned short  	usSocket;
   unsigned short  	usBasePort1;
   unsigned char   	ucNumPorts1;
   unsigned short  	usAttributes1;
   unsigned short  	usBasePort2;
   unsigned char   	ucNumPorts2;
   unsigned short  	usAttributes2;
   unsigned char   	ucIOAddrLines;

Structure members

The members are defined as:

usSocket

Logical socket.

usBasePort1

Base port address for range.

ucNumPorts1

Number of contiguous ports.

usAttributes1

Bit-mapped field. Valid values are:

REQ_IO_SHARED
REQ_IO_FIRST_SHARED
REQ_IO_FORCE_ALIAS_ACCESS
REQ_IO_DATA_PATH_WIDTH
REQ_IO_DATA_PATH_WIDTH_8
REQ_IO_DATA_PATH_WIDTH_16
REQ_IO_DATA_PATH_WIDTH_AUTO

usBasePort2

Base port address for range 2.

ucNumPorts2

Number of contiguous ports.

usAttributes2

Same values as for usAttributes1.

ucIOAddrLines

Number of I/O address lines decoded by a 16-bit PC card. This value is ignored by CardBus PC Cards.

Usage

Hardware applicability

16-bit PC Cards.

Version applicability

pccard: 1, 2, 3

References

ReleaseIO(D3pccard), RequestIO(D3pccard)