Clu Clu Land (NES)

Clu Clu Land
Developer: Nintendo Publisher: Nintendo Platform: NES Released in JP: November 22, 1984 Released in US: October 1985 Released in EU: February 15, 1987 Released in AS: 1985 This game has hidden developer credits. This game has revisional differences. This game has a notes page This game has a bugs page

Clu Clu Land is a game where you play as Bubbles as she clings her way around an enclosed arena, avoiding spikey things and warpholes to reveal the outline/shape of some thing, like a pineapple.

Sub-Page

Notes

Bugs

Hidden Credit

Present at the beginning of the ROM.

T.SAWANO

T.SAWANO is Takao Sawano.

(Source: CaH4e3)

Version Differences

The version present in Animal Crossing has a few modifications from the World version of the NES ROM.

Idle Loop Code

The first one changes the portion of the idle loop code. Specifically, the portion of RNG.

They replaced opcodes LDA $0010 / AND #$02 at 0x00359D with JSR $BFE0, the address where they put the same LDA $0010 / AND #$02 opcodes but prefixed with 12 NOPs which is just dumb CPU delay trick. The original game has no code at $8000-$BFFF, it is only 16K in size. The VC ROM is expanded to 32K to have an extra space to put this patch. The rest of extended space is empty and filled with zeroes.

The reason for this patch is not so clear currently. Maybe this is for changing the overall game behavior comparing with the original, but maybe for fixing some emulation issues.

A similar modification was made to most of the other Animal Crossing ROMs.