Data; //CPU Memory ends at 65535
define consolemem, 65536 //First cell of console memory
define keyboardmem, 67585 //Third cell of keyboard memory
define cachereset, 67556 //Cell to reset console cache
define clearconsole, 67577 //Cell to clear console screen

Code; //Start of actual code
mov ebx, keyboardmem //Set ebx register to keyboard memory
jmp Clear //Clear screen

Main:
cmp #ebx, 0 //Make sure there is something in the keyboard buffer
je Main //If there isn't anything, jump back to comparing
cmp #ebx, ecx //Fixes repeating letters kindof
je Main
cmp #ebx, 127
je Backspace
jne Write

Write: //Write to screen
mov #eax, #ebx //Move character to console memory
inc eax //Move to next console memory cell
mov #eax, 999 //Set parameters to white text on black background
inc eax //Move to next cell to input a new character
mov ecx, #ebx //Move keyboard memory to ecx register
cmp eax, 66615 //Check to see if screen is full
jg Clear //Jump to clear function
jmp Main //Jump back to compare

Clear: //Clears screen
mov #clearconsole, 1 //Set cell to clear console
mov #clearconsole, 0 //Set cell back to 0 so stuff can be written
mov eax, consolemem //Set eax back to the start of console memory
jmp Main //Jump back to main

Backspace: //Backspaces
cmp eax, consolemem
je Main
dec eax
mov #eax, 0
dec eax
mov #eax, 0
jmp Main