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Notes: May be masked by setting bit 4 on I/O port A1h. DOS 3.3+ revectors IRQ12 to a stack-switching routine unless STACKS=0 has been set in CONFIG.SYS. MS/PC-DOS use the IBM Interrupt Sharing Protocol (see #02568) when hooking this IRQ. Under DESQview, only the INT 15h vector and BASIC segment address (the word at 0000h:0510h) may be assumed to be valid for the handler's process
See Also: INT 33/AX=0000h - INT 33/AX=0024h - INT 5C"NetBIOS" - MEM 0040h:006Bh
Category: Hardware - Int 74h - I
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