0000                          ;======================================
0000                          ;    HELLO WORLD - ASSEMBLY VERSION
0000                          ;======================================
0810                          .ORG   $0810   ;SYS 2064 to start
0810                          .ENT   $   ;ENTER HERE
0810                          .PRAGMA   prg   ;create PRG file.
0810   78                     SEI   
0811   20 44 E5               JSR   $E544   ;QUICK SCREEN CLEAR
0814   A9 02                  LDA   #$02   ;RED BORDER
0816   A2 00                  LDX   #$00   ;BLACK BACKGROUND
0818   A0 14                  LDY   #$14   ;DEFAULT C64 CHAR
081A   8D 20 D0               STA   $D020   
081D   8E 21 D0               STX   $D021   
0820   8C 18 D0               STY   $D018   
0823                          ;DISPLAY HELLO WORLD! AT $0400
0823   A2 00                  LDX   #$00   
0825   BD 42 08     DISPHELLO:   LDA   HELLOTXT,X   
0828   C9 40                  CMP   #$40   
082A   90 03                  BCC   CHAROKAY   
082C   38                     SEC   
082D   E9 40                  SBC   #$40   
082F                CHAROKAY:   
082F   9D 00 04               STA   $0400,X   
0832   E8                     INX   
0833   E0 0B                  CPX   #$0B   
0835   D0 EE                  BNE   DISPHELLO   
0837                SPACEKEY:   
0837   EE 20 D0               INC   $D020   
083A   AD 01 DC               LDA   $DC01   ;WAIT FOR SPACEBAR
083D   C9 EF                  CMP   #$EF   
083F   D0 F6                  BNE   SPACEKEY   
0841   60                     RTS   
0842   48 45 4C 4C 4F 20 57 4F 52 4C 44 21 HELLOTXT:   DB   "HELLO WORLD!"   


_PC         0842
DISPHELLO   0825
CHAROKAY    082F
SPACEKEY    0837
HELLOTXT    0842