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AX = B404h BX = bitmap of IRQs being used???
Return:
CF clear if successful AX = 0000h BX = available for ISA??? (not(BXin) & A127h) CX = available for on-board I/O??? (not(BXin) & 40D8h) DX = available for PCI??? (either not(BXin) & 0E00h or 0000h) CF set on error AX = error code (0051h) (see #01243)
Note: The various vector types have also been called "shareable", "unshareable", and "avoidable"
See Also: AX=B400h - INT 2F/AX=1684h/BX=304Ch
Category: Expansion Bus Bios - Int 1Ah - I
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