Moon Cresta (ZX Spectrum)

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Source Code Fragments#

Three pieces of code can be found in the game. These can be found at the addresses listed below in the .tap dump.

2DA8:

        INC A
        POP HL
        POP BC
        DJNZ    NX_LOO
        LD  E,(HL)
        INC HL
        LD  D,(HL)
        INC HL
        LD  (M_PAT),DE
        LD  E,(HL)
        INC HL
        LD  D,(HL)
        INC HL
        LD  (PATVAL),DE
        LD  A,(HL)
        LD  (SCORE),A
        INC HL
        LD  A,(HL)
        LD  (N_ALNS),A
        CALL    INITAL
        JP  MAIN

INITAL  LD  A,(N_ALNS)
        LD  B,A
        LD  A,1
        EX  AF,AF'
        XOR A
        EX  AF,AF'
        LD  HL,(PATVAL)
        LD  IY,(ALTAB)
IA_B1   PUSH    AF
        LD  A,(SHEET)
        CP  6
        JP  C,IAF01
­        LD (IY+1),0
        POP AF
        LD  (IY),A
        JP  IAF02

IAF01   LD  (IY+1),50
        POP AF
        EX  AF,AF'
        AND A
        JP  Z,FARRGT
        LD  (IY),110
        JP  FARLFT

FARRGT  LD  (IY),130
FARLFT  EX  AF,AF'
IAF02   LD  (IY+2),0
        LD  (IY+3),0
        LD  (IY+4),0
        LD  (IY+5),0
        LD  (IY+6),0
        LD  (IY+7),0
        LD  (IY+8),0
        LD  (IY+9),0
        LD  (IY+10),

3674:

DD
LD  L,A
LD  A

524D:

                ,230
        LD  (BOTTOM),A
        LD  (YPOS),A
        LD  A,(SHPFLG)
        LD  (I_TEMP),A
        RLCA
        RLCA
        RLCA
        AND 7
        LD  (SHPFLG),A
        XOR A
        LD  (FIRE),A
        CALL    SETSHP
        XOR A
        LD  (SHPADD),A
        LD  (SHPGR),A
        LD  (SHPSIZ),A
        LD  (SHPXL),A
        LD  (THRADD),A
        LD  (THRGR),A
        LD  (THRSIZ),A
        LD  (THRXL),A
        LD  A,1
        LD  (INTROU),A
        LD  IY,INISND
        CALL    BEEP
ISB1    LD  A,(INTROU)
        AND A
        JP  NZ,ISB1
        XOR A
        LD  (NOISE),A
        LD  (THRADD),A
        LD  (THRGR),A
        LD  (THRSIZ),A
        LD  (THRXL),A
        CALL    SETSHP
        XOR A
        LD  (KEYF