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Forums > C64 Coding > How to mod my Final Cardridge 3 (FC III)???

2015-06-26 20:02

Holy Moses

Registered: Feb 2013
Posts: 24

How to mod my Final Cardridge 3 (FC III)???

Dear readers,

just had read out the big fat 64k Eprom of my FC3 with my beloved 64 on a boring afternoom...

I did a few changes for testing, but for some major changes I have to understand how they made it to manage the data in the 64k eprom...

I checked out, that they used the $dfff register, but I know really nothing about it.

Could someone explain it for stupid?

BTW, I have the Version with a single "27c512", there must be one later Version with 2x "27c256" I guess...

Greetings,

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2015-07-29 19:22

Holy Moses

Registered: Feb 2013
Posts: 24

Thanks alot, Count 0...

Just found something different now, atleast I don´t have to use the lame 3.8q crap anymore.

2015-07-29 21:03

chatGPZ

Registered: Dec 2001
Posts: 11386

srsly do you realize that trying to mod fc3 like that to make it work on retro replay hardware isnt ever going to work? the startup vectors are not the problem at all, its that the fc3 hardware is completely different to retro replay and the thing simply will not work unless you heavily patch it (basically rewriting large portions, because fc3 hardware uses 16k banks)

2015-08-02 19:37

Holy Moses

Registered: Feb 2013
Posts: 24

THIS is a useful answer, thanks alot.

I know, 4 banks each 16K, never thought it would be a problem.

Okay, will drop the idea and with use something I found in the net, an AR6 thing with TASS inside, too.

Thanks for your help.

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