Implement more BIOS functionality in Blinkenlights metal mode

[tkchia]

• int 0x14
  • %ah = 0 (initialize serial port)
• int 0x1a
  • %ah = 0 (get system time)
  • %ah = 2 (get real time clock time)
  • %ah = 4 (get real time clock date)
• int 0x17
  • %ah = 0, 1, 2 (write printer character; initialize printer port; get printer status)

[ghaerr]

Hello @tkchia,

Wow, you've gone to town on this, nice job! :) Do you mind if I use and test this in blink16?

Thank you!

[tkchia]

Hello @ghaerr,

Do you mind if I use and test this in blink16?

Please go ahead. :ok_hand: You can basically consider code contributions from me to Blink as public domain.

Thank you!