Blitz crashes with high CreateTimer value

Warning, only run in windowed mode, as his freezes up my computer. It works at lower values, but seems to crash/freeze at 1500. Only Ctrl+Alt+Del and end task stops this.

Graphics 800,600,0,0
SetBuffer BackBuffer()
a=True
fps=CreateTimer(1500) ; <<<< crashes at this value. works at lower values!
While Not KeyDown(1)
  WaitTimer(fps)
  Cls
  If KeyDown(57)
    For b=0 To 200
      If a=True
        ClsColor(255,255,255)
        a=False
      Elseif a=False
        ClsColor(0,0,0)
	a=True
      EndIf
    Next
  EndIf
  Flip
Wend

Crashes here too.

unrelated, but I'm curious as to why you would need a timer this fast anyways though. Why would you need to have something run through 1500 times per second? Even in your example above you would be limited to the refresh rate of the monitor. (60-75 fps) so any number above that is not changing the end result.

I would be surprised if you can go over 1000.

yea,... at 1000 then a single timer loop would be a single millisec.

You can create your own timer system with an accuracy of about 1/50'000s when using Scanline().

I've always been curious about this.

The Blitz help file says:-

frameTimer=CreateTimer(60)
WaitTimer(frameTimer) ; Pause until the timer reaches 60

- from which I took it that WaitTimer counts to 60 ms, then executes.

Whereas you're saying that it will execute after 1000/60 which is after/each 16.6 ms.

So who is right?

CreateTimer(60) will tick off every 16.6 ms. The parameter is the frequency of the timer, not the duration.