• grin@fika.grin.hu
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    1 year ago

    @anders @nthcdr lda #0 ; Load accumulator with character code for NULL
    sta $0400 ; Store it in the screen memory to clear the screen
    ldx #0 ; Initialize X register to 0
    loop lda message,x ; Load the next character from the message
    beq done ; If the character is NULL (end of string), we are done
    sta $0400,x ; Store the character in the screen memory
    inx ; Increment X register
    bne loop ; Branch back to the loop
    done rts ; Return from subroutine
    message .text “Hello World!”,0 ; Null-terminated string