ASM Community

Hi, I am a truly newbie in this forum. Can any ASM experts guide me to have UART routine within a pre-existing asm code that is at first used to shows ASCII value to the LCD? I heard using Flag is possible at the initialization. Thanks and I really need urgent help here. :D

ASM code here:
http://www.geocities.com/evios_wilber/wattmeter.asm

LCD include file here:
http://www.geocities.com/evios_wilber/lcd.asm