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This HTML version of the file intel.doc from the
PC Game Programmer's guide was produced by Zack T Smith. Fancy HTML modifications are copyright ©
2005 by Zack T Smith, all rights reserved.
This information is provided in the hope that it will be useful,
but without any warranty. It is provided AS-IS,
without even the implied warranty of fitness for a particular purpose.
W Instructions
WAIT/FWAIT - Event Wait
Usage: WAIT
FWAIT
Modifies flags: None
CPU enters wait state until the coprocessor signals it has finished
its operation. This instruction is used to prevent the CPU from
accessing memory that may be temporarily in use by the coprocessor.
WAIT and FWAIT are identical.
Clocks Size
Operands 808x 286 386 486 Bytes
none 4 3 6+ 1-3 1
WBINVD - Write-Back and Invalidate Cache (486+)
Usage: WBINVD
Modifies flags: None
Flushes internal cache, then signals the external cache to write
back current data followed by a signal to flush the external cache.
Clocks Size
Operands 808x 286 386 486 Bytes
none - - - 5 2
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