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Old 13 April 2013, 16:52   #6
Toni Wilen
WinUAE developer
 
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 46
Posts: 24,796
You are depending on undefined behavior, debugger usually breaks at hpos/vpos=(0,0) and usually CPU PC points to vblank routine's first instruction.

But there is no guarantee it happens. Which is exactly what happens when you use pipe to send commands.
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