Sega CDX game compatibility

[GameUser-16-32-128]

Dragon's Lair and Space Ace work fine. Maybe it's a fan of Don Bluth?

[cvanderhoef]

I know I'm drudging up the past but Jurassic Park and Eye of the Beholder do not work for me. JP gets distorted graphics and audio If I recall correctly and it is very slow. EotB on the other hand wouldn't boot or would freeze at the menu screen.

[segasonicfan]

It's a good thread to keep updated I think. I've played quite a lot of stuff on my Sega CD and have only found Sega Classics pack-in does not boot (on 3 CDX systems no less) and now I am having issues trying The Terminator (especially level 2 crashes).

-Segasonicfan

[segasonicfan]

UPDATE: It looks like all compatibility issues are actually BIOS related. It seems the CDX v2.21 bios was not tested as thoroughly as others. The solution: use a Mega Everdrive or similar to load a Sega CD V1.10 BIOS. Terminator and Sega Classics now work fine for me. However, I do get buzzing in the audio after this (due to different chipset and audio mixing in the CDX I'm sure) so it is not a perfect solution. Out of curiosity and collectors sake I bought one of these:
http://www.ebay.com/itm/301763960098...%3AMEBIDX%3AIT

The CD + Plus Universal Mega CD Adapter. Apparently pretty rare and the only adapter in the world known to work with the CDX / Multimega. Whether or not it fixes this issue will be interesting and I'll report back.

-Segasonicfan

[Thierry Henry]

UPDATE: It looks like all compatibility issues are actually BIOS related. It seems the CDX v2.21 bios was not tested as thoroughly as others. The solution: use a Mega Everdrive or similar to load a Sega CD V1.10 BIOS. Terminator and Sega Classics now work fine for me.

As I recall, I think we previously determined that that Sega Classics runs fine with CDX v2.21. It's more to do with a version of the game disc itself which is incompatible.

The CD + Plus Universal Mega CD Adapter. Apparently pretty rare and the only adapter in the world known to work with the CDX / Multimega.

This one works fine as well.




I tested it on my US CDX. No problems.

The Mega Cart from Tototek is compatible as well.

[segasonicfan]

As I recall, I think we previously determined that that Sega Classics runs fine with CDX v2.21. It's more to do with a version of the game disc itself which is incompatible.



This one works fine as well.

The Mega Cart from Tototek is compatible as well.

Yeah, it was one version of that disc. I bought 2 copies that were both that version though, so it is something to look out for as a serious compatibility issue.

That's really cool - I didn't know about the "CD Key" - so many cool little import carts out there I didn't know about! I had a Datel CDX growing up and always thought that was all there was.
The real question is: do these patch or replace the BIOS in some way and in doing so, fix the compatibility issue? I won't know for sure until my cart comes in the mail. Crossing my fingers.

I'm also fascinating by these import adapters. From what I gather so far, there are:

1) Datel Pro CD-X (version 1)
2) Datel Pro CD-X (version 2)
3) CD + Plus
4) CD KEY
5) Tototek Megacart

The last 3 will work on CDX / Multimega from what I understand. All are expensive though, but my Mega Everdrive makes an awful buzzing sound when loading BIOSes, I don't think my Everdrive MD did that! I'll have to investigate with other systems.

-Segasonicfan