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Nicola
Joined: 18 Sep 2006
Posts: 21
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 Posted: Sun Sep 24, 2006 4:28 pm Post subject: |
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| ...and I've tried the joining mode with another proto..and it didn't work on emus again. |
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Carnivol
gay dickhead
Joined: 21 Jun 2004
Posts: 576
Location: confirmed
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| Posted: Sun Sep 24, 2006 5:28 pm Post subject: |
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| Sorry, atleast I can't think of anything else that would work |
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LocalH
Joined: 15 May 2004
Posts: 160
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| Posted: Sun Sep 24, 2006 5:53 pm Post subject: |
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How many EPROMs are there? Since they're 8-bit wide, it sounds like they'd need to be interleaved. To tell, look at offset $80 in each EPROM dump. If you see "SG " as the first three characters at offset $80 then the EPROM holds the even bytes, and if you see either "EAG" or "EAM" (depending on whether it's a US or overseas proto) then you're looking at the odd bytes. These would need to be interleaved to make a working ROM.
Mind posting pictures of the PCB? |
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drx
Joined: 15 Apr 2006
Posts: 150
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| Posted: Sun Sep 24, 2006 6:47 pm Post subject: |
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| I guess the best way would be to show the stuff to someone who knows how Megadrive works etc. (like me :P). There's several things that might happen - eg. the even/odd bytes thing LocalH mentioned, or maybe the EPROMs were smaller, and the data got doubled. It depends... :P |
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Nicola
Joined: 18 Sep 2006
Posts: 21
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| Posted: Mon Sep 25, 2006 10:01 am Post subject: |
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| LocalH wrote: | How many EPROMs are there? Since they're 8-bit wide, it sounds like they'd need to be interleaved. To tell, look at offset $80 in each EPROM dump. If you see "SG " as the first three characters at offset $80 then the EPROM holds the even bytes, and if you see either "EAG" or "EAM" (depending on whether it's a US or overseas proto) then you're looking at the odd bytes. These would need to be interleaved to make a working ROM.
Mind posting pictures of the PCB? |
I've checked offset number 80 with the hexeditor, but no "SG" nor "eag" or "eam".
Here you have two pics. I've lost at the moment the card for the camera, so I made these with the cell phone...
I can dump it anyway with my double pro fighter. I just wanted to have the exact copies of the EPROMs. |
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tgarcia1981
Joined: 23 Aug 2005
Posts: 8
Location: Guatemala
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| Posted: Mon Sep 25, 2006 4:00 pm Post subject: |
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Maybe this can work... searching in internet, i found in zophar domain a tool to convert between .bin and .smd
http://www.zophar.net/utilities/segautil.html
The tool's name is "ROM Converter"
There is another tools to edit de rom header and others...
I hope this can help you... |
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Nicola
Joined: 18 Sep 2006
Posts: 21
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| Posted: Mon Sep 25, 2006 6:25 pm Post subject: |
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| tgarcia1981 wrote: | Maybe this can work... searching in internet, i found in zophar domain a tool to convert between .bin and .smd
http://www.zophar.net/utilities/segautil.html
The tool's name is "ROM Converter"
There is another tools to edit de rom header and others...
I hope this can help you... |
No, this doesn't work with splitted roms.
thanks anyway |
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LocalH
Joined: 15 May 2004
Posts: 160
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| Posted: Mon Sep 25, 2006 7:11 pm Post subject: |
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| Nicola wrote: | | I've checked offset number 80 with the hexeditor, but no "SG" nor "eag" or "eam". |
Just to confirm the obvious, did you look at decimal 80 or hex $80? If your hex editor uses decimal offsets then look at offset 128.
Or, if you want, you could post the first $100 (256) bytes of each EPROM, so that one of us can confirm that you've actually got a proper dump from each chip.
| Nicola wrote: | | I can dump it anyway with my double pro fighter. I just wanted to have the exact copies of the EPROMs. |
Oh, well, that's awesome. If you do that, convert it to BIN from SMD format, and then use a program to split the file into even and odd bytes, then you'll more than likely get the same thing that you'd get from straight EPROM dumps. |
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Nicola
Joined: 18 Sep 2006
Posts: 21
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| Posted: Mon Sep 25, 2006 8:28 pm Post subject: |
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Dumped with doubleprofighter, this didn't work on segaages and gens, but it worked fine on fusion!!!
It's just a little slower (excuse me, I forgot to clear the pics from fps) but it's perfectly emulated: no music, no chopper sound, weird maps...
Main screen (no intro)
The last mission, with a weird map
When you kill your troops...
I can take all the screenshots you want now  |
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LocalH
Joined: 15 May 2004
Posts: 160
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| Posted: Tue Sep 26, 2006 1:21 am Post subject: |
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| Just out of curiousity, what's the game name inside the ROM's header - offsets $120 (J) and $150 (U/E), if you don't know. Also, the product code would be interesting to see (offsets $180-$18D). |
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Nicola
Joined: 18 Sep 2006
Posts: 21
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| Posted: Tue Sep 26, 2006 9:10 am Post subject: |
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| LocalH wrote: | | Just out of curiousity, what's the game name inside the ROM's header - offsets $120 (J) and $150 (U/E), if you don't know. Also, the product code would be interesting to see (offsets $180-$18D). |
Well, I didn't find any name inside the ROM: I've already checked the ROM with the hex editor but nothing. |
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Dot50Cal
Joined: 18 Sep 2006
Posts: 111
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| Posted: Tue Sep 26, 2006 10:06 am Post subject: |
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| Forgive me, but is there anything significantly different? IE, maps, sprites? Just curious. |
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Nicola
Joined: 18 Sep 2006
Posts: 21
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| Posted: Tue Sep 26, 2006 11:15 am Post subject: |
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| Dot50Cal wrote: | | Forgive me, but is there anything significantly different? IE, maps, sprites? Just curious. |
Well, did you read what I wrote? Yes, it's filled with difference. It's a preliminary version. Sprite glitches, unfinished maps and the last mission is a "weird land". Differences in text, with Beirut as enemy capital. No intro, no music, no chopper sound, strange stuff happen (like enemy appearing from nothing)... |
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LocalH
Joined: 15 May 2004
Posts: 160
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| Posted: Tue Sep 26, 2006 8:36 pm Post subject: |
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| Nicola wrote: | | LocalH wrote: | | Just out of curiousity, what's the game name inside the ROM's header - offsets $120 (J) and $150 (U/E), if you don't know. Also, the product code would be interesting to see (offsets $180-$18D). |
Well, I didn't find any name inside the ROM: I've already checked the ROM with the hex editor but nothing. |
That's odd, Gen/MD carts usually have a name in the header, even protos (for example, the Gunstar Heroes sample has "LUNATIC GUNSTAR" in the header).
Mind just posting a screenshot of the range $100-$1FF in a hex editor? |
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ICEknight
Joined: 15 Dec 2003
Posts: 569
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| Posted: Wed Sep 27, 2006 6:55 pm Post subject: |
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| I'm thinking the contents of the chips might be byteswapped like in Robocod and some other EA game, like Haze found out some time ago. Also, both might have to be deinterleaved in order to get the proper ROM. |
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LocalH
Joined: 15 May 2004
Posts: 160
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| Posted: Wed Sep 27, 2006 8:38 pm Post subject: |
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| Well, Nicola said he already dumped it with his DPF, so unless there's a pressing need for direct EPROM dumps, he's in good shape. |
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Nicola
Joined: 18 Sep 2006
Posts: 21
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| Posted: Wed Sep 27, 2006 9:11 pm Post subject: |
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| LocalH wrote: | | Mind just posting a screenshot of the range $100-$1FF in a hex editor? |
excuse me, I have some internet connection problems...here you have it!
 |
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drx
Joined: 15 Apr 2006
Posts: 150
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| Posted: Wed Sep 27, 2006 10:24 pm Post subject: |
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| Hah, it's an .SMD file, it's encrypted. To see what's inside you'd have to use some SMD2BIN utility that converts that to binary. |
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Nicola
Joined: 18 Sep 2006
Posts: 21
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| Posted: Thu Sep 28, 2006 6:06 am Post subject: |
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| drx wrote: | | Hah, it's an .SMD file, it's encrypted. To see what's inside you'd have to use some SMD2BIN utility that converts that to binary. |
Bingo!!!!!!!!!!!
Great!!!!
Internal title: a (or 302)
Prod. code: u
Countries: 0
Native title: a |
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LocalH
Joined: 15 May 2004
Posts: 160
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| Posted: Thu Sep 28, 2006 7:56 pm Post subject: |
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| Damn, that's weird. |
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