MMM cartridge + MSX -> ColecoVision's games

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Van TaylorsEverythingChannel

Master (234)

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18-10-2020, 16:44

I will see if I can find that in your conversion and test it in my own Muffie collection. hbarcellos found Muffie's Gyruss that had fully emulated SN76489A, but it's a beta. I've converted Coleco games like that because it's actually powerful.

Van hbarcellos

Hero (613)

afbeelding van hbarcellos

18-10-2020, 17:03

TaylorsEverythingChannel wrote:

I will see if I can find that in your conversion and test it in my own Muffie collection. hbarcellos found Muffie's Gyruss that had fully emulated SN76489A, but it's a beta. I've converted Coleco games like that because it's actually powerful.

I have spoke with Muffie today and, due to his lack of time these days, he's STRONGLY considering releasing all of this development framework in order to help some other guys, like you, to continue his work.

Most conversions are extremely easy. There are two fully converted BIOS. One for games that does not use rst 38h, and the other for games like Popeye, which use it.
Joystick is fully emulated on keyboard and MSX joysticks.
Several SN76498A emulator versions: original (noise as tones) and the beta v6 (the one already released) with alpha noise emulated.
His find ram routines (the ones which made a huge difference between his conversions and the first crappy ones to pop-up around here 12 years ago. The *PAID* ones from another Brazilian.

Let me know if you're interested.

All the Best, Taylor.
:)

Van hbarcellos

Hero (613)

afbeelding van hbarcellos

18-10-2020, 17:09

Forgot to mention that, original ROMS are transformed into DB files. There's a extremely simple C tool he created for that included in the files. That enables easy access for recreating (or converting) entire parts of the game. This is a substract of Tutankham which he WAS working to include MSX2 tiles and the complete new audio engine using's ShiruAFX-Play v4.

Van TaylorsEverythingChannel

Master (234)

afbeelding van TaylorsEverythingChannel

18-10-2020, 17:31

Okay, I do have some conversions that I would like to show him. I'm packing all my conversions up now.

Van hbarcellos

Hero (613)

afbeelding van hbarcellos

18-10-2020, 17:41

I mean... he wants to give you the source code to his conversions as he's not having enough time to do anything beyond his two jobs.

He might finish Popeye, but that would most probably be all.

Van TaylorsEverythingChannel

Master (234)

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18-10-2020, 18:30

Oooooooh. Okay then, I would like to see some source. Plus, video is going to be finished uploading soon.

Van hbarcellos

Hero (613)

afbeelding van hbarcellos

18-10-2020, 19:50

Hmmm. I can see you changing machines to make some of them work. Shouldn’t be that way...
I’ll send you his files.

Van TaylorsEverythingChannel

Master (234)

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18-10-2020, 20:12

Oh. Okay.

Van gdx

Prophet (3809)

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19-10-2020, 02:56

It's interesting but it would have been better to say it in the right thread.

https://www.msx.org/forum/development/cross-development/cole...

Here we are talking about conversions for MSX + SN76489. I chose to use the SN76489 because whatever the ingenuity deployed, the sound conversion to PSG or SCC is less good and even sometimes bad for several games. Even openMSX doesn't emulate this chip well enough for my taste. For me sound is important in games. The SN76489 is a solution simple and inexpensive and it also allows to improve the sound by using the MSX's PSG at same time for people who prefer make enhanced conversions (like Gyruss from Repro Factory).

As for me, I prefer to make conversions first the most faithful to the originals. I only modified a few games to correct bugs or a small detail that bothered me.

Rest assured I also like the enhanced versions (Jungle Hunt, Montezuma's Revenge, Tutankham, etc are nice) and PSG versions but it's just that I don't have time to do it. I therefore privileged the pleasure of seeing the Coleco games function as on the real ColecoVision console.

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