The Intel 8086 / 8088 / 80186 / 80286 / 80386 / 80486 Instruction Set
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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