Space Invaders Deluxe

Space Invaders Deluxe
Also known as: Space Invaders Part II (INT), Moon Base (Nichibutsu) Developer: Taito Publishers: Taito (INT), Midway Manufacturing (US), Nichibutsu (Moon Base) Platform: Arcade (Taito 8080-based black and white hardware) Released in JP: 1979 Released in US: 1980 Released in EU: 1980 Released in AU: 1980 Released in KR: 1981? Released in BR: 1980? Released in AS: 1980 This game has uncompiled source code. This game has a hidden developer message. This game has regional differences.

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: Digital Press)

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.

Taito / Midway	Nichibutsu

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