UART        = $efe6
UART_TXB    = UART
UART_RXB    = UART
UART_STATUS = UART + 1

LED         = $efff
SW          = LED

SPI_BAUD    = $efd8
SPI_INPUT   = $efd9
SPI_OUTPUT  = $efda
SPI_CTRL    = $efdb
SPI_STATUS  = SPI_CTRL