// videoagp.h

typedef enum {
  VpNonCached,
  VpWriteCombined,
  VpCached
} VIDEO_PORT_CACHE_TYPE;
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Windows Driver Kit DDI reference (ne-videoagp-video_port_cache_type)

Description

The VIDEO_PORT_CACHE_TYPE enumeration specifies the type of caching that the system should use.

Constants

`VpNonCached`

The system should not cache the range of addresses.

`VpWriteCombined`

The system should use write-combined (WC) caching. For information about WC caching, see the Write-Combining Memory in Video Miniport Drivers.

`VpCached`

The system should use oridinary caching.

VIDEO_PORT_CACHE_TYPE - NtDoc