it seems like this `!1` is suppose to be` !0b11` or `!0x3` ?

[Ma-Y]

interrupt.rs line 67

            // Set the program counter to the supervisor trap-handler base address (stvec)
            // depending on the mode.
            let vector = match cpu.state.read_bit(STVEC, 0) {
                1 => 4 * cause, // vectored mode
                _ => 0,         // direct mode
            };
-----------> cpu.pc = ((cpu.state.read(STVEC) & !1) + vector) as u64;

[Ma-Y]

since MODE consumes 2 bits, correct me if i'm wrong