Dreamos 64: Elf Running, Syscalls, Keyboard Input, and input echo

Another update for dreamos 64, This now shows dreamos running an external program in userspace that reads input from the keyboard, and print the message back. Difference with previous video: * The program now prints a message asking for the text * It echoes the key just pressed on the keyboard * It prints the string just read Dreamos64 project: https://codeberg.com/dreamos82/Dreamos64 The executable being run: https://github.com/dreamos82/Dreamos64/blob/various_improvements/examples/example_syscall.s Book On how to write your own kernel: https://github.com/dreamportdev/Osdev-Notes/