This module provides a multiplexed dual digit 7 segment display service.
It uses the sys_timers module for timing.
Example code is also provided to show sharing a 4x4 keypad with the same I/O port
used by the display.
The code assumes a common anode display module.
Code with example service
display_dual_7seg.asm
disp_w_keypad.asm
main.asm
sys_timers.asm