2x4K Cartridge Clone in progress

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fbnbmns
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Joined: Tue Feb 16, 2016 7:11 am

2x4K Cartridge Clone in progress

Post by fbnbmns »

Hi Folks,

my name is Fabian, i'm from Germany and at the moment i'm designing a clone for the 2x4K Cartridge for the Dragon 32.
What do you think about this idea?
I will post a screenshot of the progress tonight.

Let me hear your feedback about this idea. ;)

Cheers,

fbnbmns
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robcfg
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Re: 2x4K Cartridge Clone in progress

Post by robcfg »

Hi Fabian!

Welcome to the Dragon Archive!

Regarding the cartridge, I think it would be nice if you have a damaged original cartridge. Are you designing it for use with standard 2732/2764 eproms?

Cheers,
Rob
fbnbmns
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Joined: Tue Feb 16, 2016 7:11 am

Re: 2x4K Cartridge Clone in progress

Post by fbnbmns »

Hi Fabian!

Welcome to the Dragon Archive!
Thanks! :)
Regarding the cartridge, I think it would be nice if you have a damaged original cartridge. Are you designing it for use with standard 2732/2764 eproms?
Yes, it would be a good substitute for damaged cartridges.
I'm designing it with the 2732/2764 EPROMS, just like the original.

BTW, I will need some testers for the PCB, as I don't have any chance to get a Dragon at the moment.
Just drop a PM if you are interested.
fbnbmns
Posts: 17
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Re: 2x4K Cartridge Clone in progress

Post by fbnbmns »

Finished the first revision of the board.
Attachments
Layout of the 2x4K Cartridge.
Layout of the 2x4K Cartridge.
2x4k.jpg (235.35 KiB) Viewed 2545 times
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robcfg
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Re: 2x4K Cartridge Clone in progress

Post by robcfg »

Nice!

I'll gladly test your board, as I have a couple of Dragons and equipment for burning eprom chips.

Also, please note that the original cartridges used 2532 chips which are NOT pin compatible with the 2732 (I learned that the hard way...).

Cheers,
Rob
fbnbmns
Posts: 17
Joined: Tue Feb 16, 2016 7:11 am

Re: 2x4K Cartridge Clone in progress

Post by fbnbmns »

Nice!
Thanks! I corrected some traces afterwards, because they looked so ugly. :D
I'll gladly test your board, as I have a couple of Dragons and equipment for burning eprom chips.
Great! Maybe you can find some more people (e.g. forums, groups) who want to test the board?
I will do some prototypes (handmade PCB ;) ), and then i can send one to you!
Just send me a PM.
Also, please note that the original cartridges used 2532 chips which are NOT pin compatible with the 2732 (I learned that the hard way...).
Didn't know that before! Thanks for this advice!

Cheers
Fabian
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robcfg
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Re: 2x4K Cartridge Clone in progress

Post by robcfg »

Hallo Fabian!
Great! Maybe you can find some more people (e.g. forums, groups) who want to test the board?
Sure! I have several friends that are Dragon users, and we can meet to test the board thoroughly.
Didn't know that before! Thanks for this advice!
I've found an annotated image comparing the two chips. Fortunately they're not that different, but you cannot swap them because either the chips are destroyed or you can cause any other problem to the computer.
2532 vs. 2732.png
2532 vs. 2732.png (69.61 KiB) Viewed 2520 times
I'll be sending you a PM later today.

Cheers,
Rob
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