Nintendo's Popeye [COLECO] converted to MSX

Page 3/6
1 | 2 | | 4 | 5 | 6

By hbarcellos

Hero (613)

hbarcellos's picture

26-10-2020, 03:06

gdx wrote:

As for me, you assume wrong. I had most games I converted in cartridge with the console at the time. When I decided to convert the coleco games I didn't know anything about the hardware of the Coleco. The conversions took several years. I take care to understand the programs as possible and I test them on different real configurations before releasing a game. I learned a lot from doing these conversions.
It's just that my goal is different from yours. I want to make them work like the originals with as little modification as possible, and I chose the simplest way to do that. After nothing prevents anyone from improving them (remove the Bios, add MSX2 features, etc).

Nah, we're similar in the challenge part. I was just telling that to Taylor. I'm really excited about his work but I think he would get more attention if he took some time to tell us more about the original games. Just an opinion.
I'm a huge fan of your work! I have nothing against trying to make games look as original as possible. You're conversions are really well made and totally respect all of them.

Not sure if you remember WHY I was so angry when I started. The other Brazilian guy, which was charging for converted ROM files based on copyrighted material (Jungle Hunt, Montezuma and etc...) When I started to complain, he literally told me : Why don't you try it yourself! The rest is history.

About improving the original games, I think it's only due to the challenge itself. With Tutankham, as I said before, I was trying to imagine how would konami port it to MSX1. That's why I used some audio files from Kings Valley. I was planning in the future to ask someone (if interested) to create sfx & draw some tiles...

Anyway... peace!
Really anxious to try your Rocky conversion. Does it uses too much noise in the audio files?

*PS2* I still think it's perfectly possible to emulate noise almost perfectly. With the certain amount of time, of course. I was almost there with Gyruss...

*PS3* About the bug, it didn't look like a copy protection. Looked like a miss calculated loop where the last interaction was wrong. BTW, back in 1983, don't know how writing in ROM could prevent any kind of copy. They would also try to clone on ROMs, I assume. Never heard of something like a Megaram...

By sdsnatcher73

Paragon (1212)

sdsnatcher73's picture

26-10-2020, 04:37

About the copy protection code (whether it was just that or not). I don’t think they created it specifically for Coleco but I it’s there because the code was used also on different machines/games. So it may have been what we now call copy/paste from another project (I am not sure if a copy/paste feature existed on their development workstations way back when Wink)

By gdx

Prophet (3835)

gdx's picture

26-10-2020, 09:18

hbarcellos wrote:

Nah, we're similar in the challenge part.

Yes but what I mean is you convert the games one by one until they become 100% like MSX games. Me, I leave the appearance and sound original. Only Rock'n Rope has the colors that change a bit on MSX2.

hbarcellos wrote:

I still think it's perfectly possible to emulate noise almost perfectly. With the certain amount of time, of course. I was almost there with Gyruss...

You are probably right and I would be happy to listen this, but currently I continue to work with the SN76489 that is the simplest way.

I'm a fan of your conversions and even those which are sold in MSX cartridges as long as the prices are not demancial. ColecoVision users are less lucky man than we are, MSX to Coleco conversions are much more expensive and the expansion module is twice as expensive than the MMM which is a little more evolved. In addition, SN76489 began to be built into most major flash card interfaces.

hbarcellos wrote:

Really anxious to try your Rocky conversion. Does it uses too much noise in the audio files?

You'll probably be disappointed because it will require an SN76489 and JoySNES to play.

By hbarcellos

Hero (613)

hbarcellos's picture

26-10-2020, 12:26

gdx wrote:

You'll probably be disappointed because it will require an SN76489 and JoySNES to play.

How do you do, during development, to test if everything is working? Have you created a special BlueMSX and/or OpenMSX machine with SN chip at it's original port?

By gdx

Prophet (3835)

gdx's picture

27-10-2020, 10:19

It's difficult to answer precisely. First, I check with BlueMSX if there are any routines from the VDP that are called in the interrupt routine. If so, I check if that calls any VDP routines out of the interrupt routine. If there is, I put DIs and EIs. If there are common routines, I double these routines to make one without DI-EI and one with. Then I test on OpenMSX with the emulated MMM and on emulated MSX and on some real MSX.

If the game works this way, I optimize to compensate a bit the additional conversion routines. Then I test the game over and over again...

For the JoySNES, I added the routine last because it is not emulated.

By hbarcellos

Hero (613)

hbarcellos's picture

01-11-2020, 16:59

where can I publish the ROM file?

By tfh

Prophet (2474)

tfh's picture

01-11-2020, 17:51

hbarcellos wrote:

where can I publish the ROM file?

Just e-mail it to M S X @ F I L E - H U N T E R . C O M and I can put it online for you. Both for playing online and download if you wish.

By hbarcellos

Hero (613)

hbarcellos's picture

01-11-2020, 21:45

tfh wrote:
hbarcellos wrote:

where can I publish the ROM file?

Just e-mail it to M S X @ F I L E - H U N T E R . C O M and I can put it online for you. Both for playing online and download if you wish.

By tfh

Prophet (2474)

tfh's picture

01-11-2020, 21:57

And here it is, to play online and to download: Popeye RC1

By hbarcellos

Hero (613)

hbarcellos's picture

01-11-2020, 22:16

tfh wrote:

And here it is, to play online and to download: Popeye RC1

for some reason, sound's awful @ webmsx with some high pitched tones in the background.
Would be lovely if someone can confirm if that happens on a real MSX.

*PS* Luckily, as we're all getting really old, maybe we'll miss those tones. oO

Page 3/6
1 | 2 | | 4 | 5 | 6