Component: Abstract Bus
====================
This card allows for interfacing with [Stargate Tech 2](http://stargatetech.theender.net/miscellaneous/home.html)'s Abstract Bus system.

Component name: `abstract_bus`.  
Callbacks:

- `getEnabled(): boolean`  
  Returns whether the local bus interface is enabled.
- `setEnabled(enabled: boolean)`  
  Sets whether the local bus interface should be enabled
- `getAddress(): number`  
  Returns the local interface address. `number` is a 16 bit hexadecimal number (0xFFFF being a broadcast).
  Returns `0` if an address has not yet been set.
- `setAddress(address: number)`  
  Sets the local interface address. `number` is a 16bit hexadecimal number.
- `scan(mask: number): table`  
  Scans the abstract bus for attached devices and returns them in a list.
- `send(address: number, data: table): boolean`  
  Sends data across the abstract bus. The table `data` is in the form of key-value pairs, e.g.  
  ```
  lua> component.abstract_bus.send(0xFFFF, { ["action"]="dial", ["address"]="Losomdeh Salothirt Erpac" })
  ```
  * See SGTech2 documentation for more info on the Abstract Bus.
- `maxPacketSize(): number`  
  Returns the maximum size a packet can be sent over the bus.

The abstract bus generates a signal named `bus_message` if a message is received. See the [[signals|signals reference]].

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