First release.

Five screens are implemented.

• PORTS
  Port Control register from PORT1 to PORT4
• PORT n
  Port Control register of PORT n where n is 0 to 9, such as port1
• P mn
  Port Function Select register of P mn where m is 0 to 9 and n is 00 to 15, such as p102
• PINS
  Port Function Select register from D0 to D19 of Arduino pins
• AGT n
  Asynchronous General-Purpose Timer register of AGT n where n is 0 or 1, such as agt0