I'm currently writing a program that asks for user input via command line that asks a user for an EEPROM address and 8-bit data to be stored inside the same address.

I currently have the assembly code that reads and writes the 8-bit data from the user and stores it in a predefined address which is then moved into a register.

The part I'm having trouble with is asking the user for the address where they want to have their 8-bit data stored. This is what I have so far inside the functions:

EEPROM_Write: sbic EECR,EEPE rjmp EEPROM_Write ; Wait for completion of previous write ldi r18,0x00 ; Set up address (r18:r17) in address register ldi r17,0x05 call UART_Get ; Used to get 8-bit user input lds r16, ASCII ; Set up user input in r16 out EEARH, r18 out EEARL, r17 out EEDR,r16 ; Write data (r16) to Data Register sbi EECR,EEMPE ; Write logical one to EEMPE sbi EECR,EEPE ; Start eeprom write by setting EEPE ret EEPROM_Read: sbic EECR,EEPE rjmp EEPROM_Read ; Wait for completion of previous write ldi r18,0x00 ; Set up address (r18:r17) in EEPROM address register ldi r17,0x05 ldi r16,0x00 out EEARH, r18 out EEARL, r17 sbi EECR,EERE ; Start eeprom read by writing EERE in r16,EEDR ; Read data from Data Register sts ASCII,r16 ret 

Can someone give me some pointers on how to ask for user input and convert it into an address inside a register?

Thanks in advance.