If a bit is on in the STATE MASK byte, the state it represents is adopted
by the device if the corresponding bit is also on in the STATE VALUE byte.
- 0 USER
- User mode. Turn the yellow light on if the same bit is on in STATE VALUE.
- 1 LOCK
- Locked/Unlocked. If locked, MSR input is inhibited.
- 2 AUTO
- Autoenter on/off. If set on, any card read by the MSR causes an ENTER
operation. If off, only a secure card causes an ENTER.
- 3 Ai1S
- Suppress audible alarm 1.
- 4 Ai2S
- Suppress audible alarm 2.