Creativision MegaSDCart

[nippur72]

thanks for the explanation, interesting design.

There are similar projects that halt the CPU via the 6502 "RDY" pin and write to the bus, but I guess on the CV it's not possible because such pin is not connected on the mainboard.

In my project with the VIA chip I get loading times around 3-4 seconds for large files, not bad but still slower than your MegaSDcart I use one of the VIA 8 bit ports for data exchange plus two additional lines for handshake. All is driven by a DOS that resides in ROM (written in C).

[Scouter3d]

Hi nippur72,

sounds also very interesting, i guess my Replika Apple 1 Mobo will forever only be a nice walldecoration (as a few parts are very hard to come by and rather expensive...)

Cheers, TOM:0)

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[nippur72]

yes such parts are very hard to find

I love the Apple1 but honestly there's not much you can do with it, the display is too limited IMO, you can't write games or things like that. We have build a TMS9918 video card expansion for it, but in the end you are just recreating a Creativision LOL

Anyway if you are into MiST FPGA I made a very accurate Apple1 implementation that has a 15Khz video output and can even load and save real tapes. It's not like the real thing but it's the closest you can get without having the original chips.

[Mobsie]

That’s cool, can you share your apple1 photos? As an Apple freak you would made me happy

[nippur72]

That’s cool, can you share your apple1 photos? As an Apple freak you would made me happy

I don't have an A1 myself, but Claudio (the hardware designer in our team) has a replica, here are two videos showing our experiments:

• Apple-1 Graphic Card
• Apple-1 SID TUNE / SPRITES demo

[Mobsie]

Cool, thank you

[Scouter3d]

Hi,

i just ordered the first Prototype PCB for the MegaSDCart... should be in my hands in three weeks... :0) - soooo excyting!

Cheers, TOM:0)

Proto_PCB.jpg

[Scouter3d]

Hi,

the Prototype-PCBs have arrived! I will test them in the next days.. :0)

Cheers, TOM:0)

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[MADrigal]

OMG thats so cool!!!

[Mobsie]

So great