Bubble Bobble (FDS port) - rev en

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krzysiobal
Posts: 719
Joined: Sun Jun 12, 2011 12:06 pm
Location: Poland

Bubble Bobble (FDS port) - rev en

Post by krzysiobal » Sun Oct 06, 2019 1:18 am

Code: Select all

Mapper 108

Registers:
* F000-FFFF - PRG register [.... PPPP] 

$6000 $8000 $a000 $c000 $e000
 PPPP    12    13    14    15
 
Mirroring: Horizontal

Bus conflicts: no


Warning:
* No M2 is taken during decoding of $6000-$7fff
* PRG-ROM's A7 and A12 are swapped
Image Image Image Image Image

NewRisingSun
Posts: 1189
Joined: Thu May 19, 2005 11:30 am

Re: Bubble Bobble (FDS port) - rev en

Post by NewRisingSun » Sun Oct 06, 2019 2:08 am

The dump I have (PRG-ROM CRC32 0xAF799590) writes an awful lot of stuff to addresses other than $F000-$FFFF. Most of it originally were writes to FDS registers ($4020-$402F) that were redirected to the $8000-$BFFF range for some reason, and a few were writes to the KS202 chip of the Kaiser conversion on which this is based. :)

In addition to the DH-08 (this) and the Kaiser conversion (mapper 142), there is also a version using CHR-ROM rather than CHR-RAM, and that also runs on mapper 108 and its UNIF equivalent "UNL-BB". That mapper needs to be cleaned-up by splitting it up (notice the "hacky-hacky" remark in FCEUX source code).

Ice Man
Posts: 530
Joined: Fri Jul 04, 2014 2:34 pm

Re: Bubble Bobble (FDS port) - rev en

Post by Ice Man » Sun Oct 06, 2019 4:03 am

Hmm, didn't Meikyuu Jiin Dababa use FDS UNROM Mapper 108 as well? Or do both work different eventhough having same mapper?

viewtopic.php?f=9&t=19303&hilit=dababa+fds


Also, isnt 61256 a 32x8K SRAM and not a 6264?

NewRisingSun
Posts: 1189
Joined: Thu May 19, 2005 11:30 am

Re: Bubble Bobble (FDS port) - rev en

Post by NewRisingSun » Sun Oct 06, 2019 5:39 am

I am not sure. Krzysiobal, what is the PRG-ROM CRC32 of your Kaiser KS-7016B Dababa?

There is a mapper 108 version of Dababa, but I had always thought that it was from Whirlwind Manu. (Edit) And that dump does not work with the mapper described as KS-7016B. (Edit end)

Other mapper 108/UNL-BB games:
- Falsion (Whirlwind Manu)
- Pro Wres (without title screen)
Dababa and Falsion write to $8xxx and expect the write to have an effect. Pro Wres writes to $Dxxx, expecting to only switch CHR-ROM.

krzysiobal
Posts: 719
Joined: Sun Jun 12, 2011 12:06 pm
Location: Poland

Re: Bubble Bobble (FDS port) - rev en

Post by krzysiobal » Sun Oct 06, 2019 6:01 am

I am not sure. Krzysiobal, what is the PRG-ROM CRC32 of your Kaiser KS-7016B Dababa?
2EC5F4C2
Also, isnt 61256 a 32x8K SRAM and not a 6264?
There was originally 6264 in 0.6" package but I needed it for another project. I have a lot of 62256 in 0.3" package and this cartridge has holes for both 0.3" and 0.6", so I made harmless swap.

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