WARNING: modifications in `r' are used outside of int2F_12_handler() * On input r.AX==0x12xx, 0x4A01 or 0x4A02 * also handle Windows' DOS notification hooks, r.AH==0x16 and r.AH==0x13 * along with DRIVER.SYS/DRIVPARAM r.AH=0x08 calls */
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no test coverage detected