Hi..
 SS> CH> NMI is also used for math coprocessor exceptions in 286 and 386
 SS> designs,
 SS> Not quite correct. 286 & 386 use IRQ13 for signalling FPU errors
 SS> (though the default BIOS handler eventually calls INT 2 for
 SS> compatibility). My BIOS' IRQ13 handler looks like this, for example:
 Yeah, forgot that MNI is 'emulated' in these designs. Apologies, all.
       Craig
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