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67 lines
1.4 KiB
67 lines
1.4 KiB
#ifdef i386
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//------------------------------------------------------------------------
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//
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// File: PORTMEM.C
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//
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// Contains generic memory mapped port access routines.
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//
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// Revisions:
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// 01-08-93 KJB First.
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// 02-25-93 KJB Renamed routines from CardPort to PortMem.
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//
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//------------------------------------------------------------------------
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#include CARDTXXX_H
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//
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// PortMemSet
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//
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// This routine sets a mask on a certain port. It or's the mask with
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// the value currently at the port. Works only for ports where all bits
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// are readable and writable.
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//
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VOID PortMemSet (PUCHAR baseIoAddress, UCHAR mask)
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{
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UCHAR tmp;
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PortMemGet (baseIoAddress, &tmp);
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tmp = tmp | mask;
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PortMemPut (baseIoAddress, tmp);
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}
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//
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// PortMemClear
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//
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// This routine clears a mask on a certain port. It and's the inverse with
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// the value currently at the port. Works only for ports where all bits
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// are readable and writable.
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//
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VOID PortMemClear (PUCHAR baseIoAddress, UCHAR mask)
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{
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UCHAR tmp;
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PortMemGet (baseIoAddress, &tmp);
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tmp = tmp & (0xff ^ mask);
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PortMemPut (baseIoAddress, tmp);
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}
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//
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// PortMemTest
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//
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// This routine clears a mask on a certain port. It and's the mask with
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// the value currently at the port. This result is returned.
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//
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BOOLEAN PortMemTest (PUCHAR baseIoAddress, UCHAR mask)
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{
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UCHAR tmp;
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PortMemGet (baseIoAddress, &tmp);
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return (tmp & mask);
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}
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#endif
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