Space Invaders Deluxe

It's Space Invaders Deluxe, or Space Invaders Part II in case you didn't see the first part.

Developer Message#

Space Invaders Deluxe/Part II	Moon Base/Zeta set 2

By pressing 1P Right+1P Fire+2P Start then 1P Left+1P Fire+1P Start at the attract gameplay sequence, the text "TAITO CORP." appears below the high-score. This is also present in Moon Base/Moon Base Zeta set 1 but changed in set 2 to "NICHIBUTSU.".

Source Code#

There's some uncompiled source code at the end of the ROM, starting at 0x1F59. This corresponds to 0x4309 to 0x4323 in the ROM. This isn't present in the Midway version.

   JNZ EXIN4
    DCX H
    MOV A,M
    ANI 80H
    RZ
EXIN1:  LDA PU+0A0H
    ANI 0FH
    MOV B,A
    LDA PU+0AH
EXIN2:  DCR B
    JZ  EXIN3
    ADI 10H
    JMP EXIN2
;
EXIN3:  ADI 04H

B0H,0B0H,0B0H
    DB  2CH,58H,58H,84H
    DB  84H
;
;
;   ***** CHARACTER DATA *****
;
CHROM:  DB  1FH,24H,44H    ;  A   <00>
    DB  24H,1FH
    DB  7FH,49H,49H    ;  B   <01>
    DB  49H,36H
    DB  3EH,41H,41H    ;  C   <02>
    DB  41H,22H
    DB  7FH,41H,41H    ;  D   <03>
    DB  41H,3EH
    DB  7FH,49H,49H    ;  E   <04>
    DB  49H,41H
    DB  7FH,48H,48H    ;  F   <05>

Regional Differences#

Taito	Midway	Nichibutsu

The game was licensed twice, by Midway Manufacturing as Space Invaders Deluxe (although the title screen doesn't reflect this due to Taito only letting Midway do minor code changes) and Nichibutsu as Moon Base or Moon Base Zeta (the marquee uses the former but the instruction sheet and title screen use the latter). Space Invaders Deluxe positions the logo, copyright and credit text 8 pixels higher and doesn't use a color overlay.

Additionally, Moon Base/Zeta redesigns the player ship and UFO enemies.