Zitat von
sakura:
Gravierender Nachteil bleibt der Fakt, daß die Maus nur recht wenig bewegt wird und somit nur wenige Daten anfallen
Man könnte die Daten mit den untersten 8 Bits des CPU Taktzyklenzählers anreichern.
Dies funktioniert allerdings nur beim Pentium Prozessor.
Delphi-Quellcode:
{**************************************************************************
* NAME: GetCPUTick
* DESC:
* Processors Intel Pentium have a powerful command RDTSC.
* This is an extraction from Intel documentation on this command:
* "Loads the current value of the processor's time-stamp counter into the
* EDX:EAX registers.
* The time-stamp counter is contained in a 64-bit MSR.
* The high-order 32 bits of the MSR are loaded into the EDX register,
* and the low-order 32 bits are loaded into the EAX register.
* The processor increments the time-stamp counter MSR every clock cycle and
* resets it to 0 whenever the processor is reset."
* Note that RDTSC command returns the values in Int64 format used in Delphi.
*************************************************************************}
function GetCPUTick: Int64;
asm
DB $0F,$31
// this is RDTSC command.
// it is not supported by the Delphi inline assembler
end;