ZBasic System Library
See the resource usage sub-section UARTs for information on which UART is assigned to each available
serial channel, the transmit and receive pins, and the ISRs utilized for native mode devices.
The software-based serial channels are implemented using the Serial Timer. See the resource usage
sub-section Timers for information on which timer is used for a particular target device
In BasicX, the supported channel numbers are 1 to 3, depending on the particular target chip. Also,
BasicX doesnt support the use of zero to indicate that no queue is being supplied.