Change Note 2024-06-16
Extended UART device module, new example program.
	Module UARTdev
- Add register addresses for interrupt and DMA handling to 
Device. - Add API for interrupt configuration and usage.
 - See example program UARTint.
 
Module MCU2
- Add interrupt numbers.
 - Correct DMA register addresses to use offsets, as with other devices.
 - Add DMA DREQ indices.
 
Module Exceptions
- Interrupt numbers refer to corresponding definitions in MCU2.
 - These definitions in this module may be deprecated, or replaced with more generically named items, in the future, eg. for other MCUs.
 
New Example Program UARTint
- Explore and use the UART’s transmit interrupt.
 - See UARTint.