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Note: The ROM BIOS uses 0030h:0100h as the initial stack on startup, which is the last fourth of the interrupt vector table. If the processor is returned to real mode via a hardware reset (the only possibility on an 80286, though there are a number of ways of generating one), then the BIOS startup code stacks three words on its scratch stack before determining that a return to real mode has been requested. As a result, INT FE and INT FF are corrupted.
See Also: INT FF"XT286"
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