; ========================================================== ; COMMODORE 64 - Examples in 6502 Assembly language ; © Digitsensitive; digit.sensitivee@gmail.com; ; C64 User's Guide - Getting Started: Print ; ; This example shows how text can be printed in assembly language. ; ; Here is the example in BASIC: ; PRINT "COMMODORE 64" ; ========================================================== *=$02a7 ; sys 679 [up to $02FF (767), 88 bytes] ; ---------------------------------------------------------- ; Load string ; ---------------------------------------------------------- ldx #$00 ; set x to zero ldstr lda str,x ; take byte by byteee cmp #$00 ; check for delimeter beq main ; branch to main if delimeter reached and #$3f ; convert to uppercase sta $400,x ; store byte to screen area inx ; increase x jmp ldstr ; redo loop ; ---------------------------------------------------------- ; Main Loop ; ---------------------------------------------------------- main rts ; ---------------------------------------------------------- ; Data ; ---------------------------------------------------------- str .text "COMMODORE 64" ; our string .byte $00 ; set our delimeter to zero