0.135u1 [Manuel Abadia]
0.63 [Manuel Abadia]
DECRYPT FILE required
WIP:
- 0.171: Samuel Neves and Peter Wilhelmsen figured out algorithm and replaced Snow Board Championship lookup table with proper emulation of device.
- 0.170: Charles MacDonald and David Haywood added 8GB decrypt table to Snow Board Championship and clone - Game now playable.
- 3rd January 2016: David Haywood - Gaelco's SnowBoard Championship is a step closer to being emulated. Unlike most Gaelco games which used an evil Dallas protection device complete with suicide battery, SnowBoard Championship instead used a less complex device programmed to do some decryption tasks, and used as protection. The game was passing various things to the device, like text strings, sample numbers, and some directional direction used by the game, it expected correct data back in order for the game to run properly. Previously in MAME the game would display corrupt text, hang during attract mode, play incorrect samples and have completely broken controls. The operation of the device turned out to be simple, actually even less complex than I was first expecting. I'd already briefed Charles MacDonald (who purchased a PCB for running our tests) that the game writes 32-bits of data to an address, and reads 16-bits back from another address, and that it uses different pairs of addresses throughout execution, so naturally I was expecting the different addresses to use different encryption schemes, one of his first discoveries was that the address was completely irrelevant, done only to throw off anybody trying to understand it. With this knowledge he made a few mods to the hardware and software running on the board to collect the 16-bit results for all possible 32-bit writes the game could make, resulting in an 8GB table. I hooked this 8GB table up in MAME to verify the results and the game immediately started working. We still need to reduce the 8GB table to actual equations, Olivier plans on looking at this, but rest assured the game is now very close to being playable in a public build of MAME. RAR compression manages to reduce the table to a 180MB file, there are clear patterns all over the place, so I doubt even that is especially complex.
- 0.135u1: Changed clone 'Snow Board Championship (Version 2.1)' to parent and (set 1) to clone 'Snow Board Championship (Version 2.0)'. Renamed (snowboar) to (snowboara) and (snowboara) to (snowboar).
- 16th November 2009: ANY dumped Snow Board Championship (Version 2.0) - already in MAME. GFX rom same as version 2.1.
- 0.133u1: Renamed (snowbalt) to (snowboara).
- 0.132u2: Brian Troha minor fixed Snow Board PCB layout.
- 0.130u2: Demoted Snow Board Championship to have the GAME_NOT_WORKING flag.
- 0.119u1: Changed description of clone (set 2) to 'Snow Board Championship (Version 2.1)'.
- 0.63: Manuel Abadia added 'Snow Board Championship (set 1)' (Gaelco 1996) and clone (set 2).
- 31st December 2002: Manuel Abadia fixed the dual screen display in Touch & Go and World Rally 2, and he fixed the clipping of the shadows. Additionally, World Rally 2 is actually playable as long as you don't crash.
- 30th December 2002: Manuel Abadia sent in the Gaelco CG-1V/GAE1 driver, supporting Alligator Hunt, Maniac Square and Bang! playably and World Rally 2, Touch & Go and Snowboard Championship not working because of Dallas protection.
Other Emulators:
* FB Alpha
Recommended Games (Ski):
Silver Land
Alpine Ski
Dynamic Ski
Parallel Turn
Poly-Play (ZRE) (Abfahrtslauf)
Poly-Play (ZRE-PP) (Abfahrtslauf)
Vs. Slalom
Alpine Racer
Alpine Racer 2
Alpine Surfer
Extreme Downhill
Sega Ski Super G
Snow Board Championship
Surf Planet
Winter Heat
Cool Boarders Arcade Jam
Ski Champ
Steep Slope Sliders
Arctic Thunder
Ultimate Arctic Thunder
FILE: 8 GB (Compressed: 57.3 MB)
