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Intellivision II Coleco compatibly mod explanation.


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What's wrong having different opinion on a game! :?

To each his own

 

Coleco DK was made that way on purpose!

Same things for the 2600 version

 

I remember my friend receiving DK for his Intv

I was like: Man, the Intv can't handle much beautifull graphics!

All my friends had the same reaction at that time

There was simply nothing for us that could beat the CV

Coleco's plan was successfully I guess....

 

Yeah,..... Needless to say we were wrong!

And recent programmers proved it!

 

That said, I don't think the Coleco's Intv version of DK is that bad

At least.... Until we all played the newest DK arcade version

 

And making those games today it's ALOT more easy than back in the 80's

We've everything! MAME, screenshots, videos, artworks etc.. Etc..

I think programmers back then had alot more hurddles than today's programmers (for classic consoles)

 

Not here to argue, simply to put my two cents. :)

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I borrowed Coleco Donkey Kong from a friend BITD when I was a kid. Even back then, to me it was sloppy, very poorly executed - completely disappointing. I'd go so far as to say it was a near unplayable mess. It was not fun. It was not just poor when comparing the game to the original arcade game (which it apes so poorly), it was poor compared to the Colecovision version. It was poor when compared to other similar Intellivision games too, such as Burgertime, or Lock 'n' Chase...

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I never had Coleco Donkey Kong back in the day. I had moved away from the Intellivision and onto the Atari 8-bit computers by then. It wasn't until getting back into the Intellivision and picking up games I never had in the '90s that I finally got and tried it. I was not impressed. The only time I take it out now is when I want to show someone how Coleco was able to generate more sales of the Colecovision.

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  • 6 months later...

yeah I noticed that but I thought I'd try to steer it back on track, it's the only discussion I've found on the topic.

I use an intellivision 2 because they're small and I'm in a group which puts on a retro game display a couple of times a year so smaller consoles are better.

We're you able to apply the hack consistently? Or are there any games that remain incompatible?

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Would the mod still work if I were to protect the outputs with resistors? And is there any harm making it pulse on startup as far as compatibility with other games?

 

I couldn't be sure.

 

But, the chip you're exposing to potential damage is a custom chip (labeled "Mattel LAD"), so if you damage it, you can't just solder in a replacement without taking it from another Intellivision 2.

Edited by intvnut
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Yeah I guessed as much. Putting 10k resistors in line with those outputs before they hit the cart slot should remove any danger, I just dont know if it will still do the same thing, it'll give 2.5v on both lines if one is high and one is low, I'm not sure what it'll think of that. Maybe a nand gate will be required.

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Yeah I guessed as much. Putting 10k resistors in line with those outputs before they hit the cart slot should remove any danger, I just dont know if it will still do the same thing, it'll give 2.5v on both lines if one is high and one is low, I'm not sure what it'll think of that. Maybe a nand gate will be required.

 

 

Well, in TTL, a logic 0 is no higher than 0.7v or so, and logic 1 is anything above 2.4v or so. Also sink vs. drive strength is usually asymmetric—ie. outputs can sink to 0 easier than they can drive to 1—as are output voltages (logic 0 is usually between 0v and 0.6v, and logic 1 is often between 2.5v and 4v).

 

Putting 10KΩ resistors between those lines and the switch would likely make the switch do nothing, as one side would be able to pull up easily enough separate of the other side pulling down, and nothing would happen.

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  • 1 year later...

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