Antitrack_at_networld.at
Date: 2007-05-21 21:30:07
Hello World! :-)
Since I actually successfully made my 8kernal/8modules-switchboard, I thought
it would be a great idea to be able to make more complicated cartridge hardware
for the c-64. However, I haven't found any sort of good "manual" of how to
design cartridges that are above "trivial".
For example, I still don't know how to actually design a cartridge that would
use just a single memory location like $df00, for example for selecting the
right $8000-bank from a (larger) eprom on the cartridge. (Such was being used
by Ocean to distribute some games on cart.)
What I actually plan to do is to design a real cheap TCP-IP Interface using an
Atmel AVR for handling all the TCPIP communication. I plan to use some
registers like $df00-$df0a much in the way the REU (commodore ram expansion)
does, for transfering the data from the c64 memory via DMA to the Atmel AVR,
who should then transfer the data over TCPIP to PC etc.
However, as mentioned before, I'm at a complete loss of how to design such a
thing, and I don't know how to use these lines from the cart port:
I/O1 , /I/O2, BA, DMA, Phi2....
Anyone has any documentation on these lines or how to use them when building
your own complex cartdrige?
Anyone has a schematic with an eprom and a $df00-bank-switch-cartridge so as to
start with an example?
Yours
ATT
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