Creativision MegaSDCart
Re: New hardware coming soon...
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).
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).
Re: New hardware coming soon...
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)
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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Re: New hardware coming soon...
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.
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.
Re: New hardware coming soon...
That’s cool, can you share your apple1 photos? As an Apple freak you would made me happy
Re: New hardware coming soon...
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:
Re: New hardware coming soon...
Cool, thank you
Re: New hardware coming soon...
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)
i just ordered the first Prototype PCB for the MegaSDCart... should be in my hands in three weeks... :0) - soooo excyting!
Cheers, TOM:0)
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Re: New hardware coming soon...
Hi,
the Prototype-PCBs have arrived! I will test them in the next days.. :0)
Cheers, TOM:0)
the Prototype-PCBs have arrived! I will test them in the next days.. :0)
Cheers, TOM:0)
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Re: New hardware coming soon...
So great