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 | ||||
|---|---|---|---|---|
| operands | 286 | 386 | 486 | Size Bytes |
| none | 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 | ||||
|---|---|---|---|---|
| operands | 286 | 386 | 486 | Size Bytes |
| none | 5 | 2 | ||
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