; task :
; - sum the following 5 numbers
; - save the result of the sum at memory address 7F
; (numbers are in base16 notation)
11
18
23
25
30
; expected sum: A1

; program:

                           ; mem = [0] * 128
                           ; mem[0:5] = [0x11, 0x18, 0x23, 0x25, 0x30]
A2 00    ; LDX # 0         ; x = 0
A9 00    ; LDA # 0         ; a = 0
         ; loop:           ; while True:
75 00    ;   ADC zp,x 0    ;   a += mem[0 + x]
E8       ;   INX i         ;   x += 1
E0 05    ;   CPX # 05      ;   _ = (x == 5)
D0 F9    ;   BNE r loop    ;   if _ == True: break
85 7F    ; STA zp 7F       ; mem[0x7f] = a
         ; forever:        :
4C 12 00 ;   JMP a forever ; while True: pass