Josh Dury said it was a "battle against time" to get the shot
But why are so many fish at risk? How will this system protect them? And why did farmers more than 70 miles (112.6km) from the power plant face losing their land?
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Real-mode programs freely execute CLI and STI to control interrupts, PUSHF and POPF to manipulate flags, INT n for DOS and BIOS calls, and IN/OUT for hardware I/O. In normal protected mode, these instructions are privilege-checked -- they execute normally if the caller has sufficient privilege, and fault otherwise. The 386 can't simply let V86 tasks execute them freely -- a DOS program disabling interrupts would bring down the whole system -- but trapping on every INT 21h call would make V86 impractically slow.
"This would have been a very decorative brooch. I think it's a very special find for the site."