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Twoflower
Registered: Jan 2002
Posts: 434 |
Some cartridge questions, help wanted.
The recent discussion about the upcoming Super Snapshot-cart reinstated my interest in my own meddling around with C-64 carts. There's pretty good documentation concerning the software parts of these games, but less on how the actual hardware logic works, and the kinds of roms used.
Last spring I did some research myself, and with the help from some friendly folks at #C-64 i've been able to deduct even more. I know this is fringe material, though I realll would appreciate some help with info and/or scans on this matter. What i've deducted so far is:
OCEAN
From what i've seen so far, all of these use a combination of a 74LS273 (Octal D-Type Flip-Flop) and a 74LS02 (2-Input NOR-Function Logic Gate) for the logic. What might be interesting to know is that the 28-pin roms which Ocean uses are identical to the NES-PRG roms, used in NES-carts. Scans of boards and pinouts for the roms are available if anyone is interested.
DOMARK
I haven't disassembled this one myself, Sack/Cosine did. I've been told that it uses a 74LS174 (Hex/Quad D-Type Flip-Flops with Clear) for the logic and that the rom should be a straight forward standard-pin rom.
PROPHET-64
This one uses a 74LS174 (Hex/Quad D-Type Flip-Flops with Clear). It is possible that it even is based on the Domark solution. Can't tell since I haven't seen a scan or photo of a Domark cart. The rom itself is a straight forward AT27C020, 2 mbit eprom.
I would need information about the IC's and/or scan of the internals of the following game cartridges, if available:
* SYSTEM 3 (Any - Myth, Last Ninja Remix, C64GS cart)
* DINAMIC (Any - After the War, Satan, Aspar GP, etc.)
* SILVERROCK (Any - Hugo, Guldkornexpressen, etc.)
* FUNPLAY (Any - Funplay, Powerplay)
* SUPERGAMES (Supergames).
Thanks in advance. |
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chatGPZ
Registered: Dec 2001
Posts: 11386 |
if it wouldnt spoil the fun cracking it for one of the active cracking groups, i could tell you exactly how the prophet 64 cart works =P
what i can tell is, that it works different than any other cartridge (any supported by the crt standard and vice atleast). and its helluva easy to dump =P |
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TNT
Account closed
Registered: Oct 2004
Posts: 189 |
Quote: if it wouldnt spoil the fun cracking it for one of the active cracking groups, i could tell you exactly how the prophet 64 cart works =P
what i can tell is, that it works different than any other cartridge (any supported by the crt standard and vice atleast). and its helluva easy to dump =P
There is VICE patch for P64 tho. And no, just extracting PRGs from dump doesn't work ;) |
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chatGPZ
Registered: Dec 2001
Posts: 11386 |
<Post edited by chatGPZ on 29/11-2007 17:45>
funny, who made the patch? or did someone steal it from my HD? (i made one for myself aswell ofcourse =P)
(and except for the sequencer, extracting the prgs works just fine =P) |
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Twoflower
Registered: Jan 2002
Posts: 434 |
I wouldn't care to code a dumper. I would desolder the 27C020 and put it into my trusty Willem-burner instead. It's sure faster - and then I could easily trace connections on the board by just scanning it. |
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hollowman
Registered: Dec 2001
Posts: 474 |
Quote: I have an old Promenade C1. Never used it. What are it's capabilities>?
Programming up to 32 k eproms works fine, like twoflower said you can program a 64k, but you will have to do it in two passes, 32k at a time, manually grounding one of the pins during one pass. The only reason I've used it was because I found it laying around at home. Today I would get a cheap programmer for pc instead. |
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TNT
Account closed
Registered: Oct 2004
Posts: 189 |
Quote: funny, who made the patch? or did someone steal it from my HD? (i made one for myself aswell ofcourse =P)
(and except for the sequencer, extracting the prgs works just fine =P)
Damn disk stealers going through your HD now... ;) I'm actually not sure about the author of the patch, but I have a strong hunch.
I only checked the image for extra data and whether the module was accessed from outside intro & menu, I didn't bother using more time for something I have little interest in myself. |
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chatGPZ
Registered: Dec 2001
Posts: 11386 |
hehe :) only the sequencer uses the module after it has been unpacked and run. the others only do some bogus accesses if i recall correctly. they crash with a cart (AR) though, because they try to init the second sid at de00. |
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The Shadow
Registered: Oct 2007
Posts: 304 |
Is using an old cartridge backer to do dumps practical or is there a newer way? |
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Twoflower
Registered: Jan 2002
Posts: 434 |
Bump
I still need some information on the above mentioned cartridges - do anybody have a Dinamic, Funplay, Silverrock or System III cart available? Sledge?
For the interested: i've brought my modded Oceancart down to Holland along with the Chase HQ II cart, as I didn't have any time to analyze it in Sweden. Unless I manage to figure it out in advance, i'll bring it to the next HCC-meeting in Maarsen to get some help from the hardware gurus there.
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Style
Registered: Jun 2004
Posts: 498 |
Whats the plan 2FL, making a mega-cart? |
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