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#109817 - 06/06/17 04:57 AM Re: New dumps [Re: Darkstar]  
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BeckieRGB Offline
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Finally was able to dump the predecessor to the Zone 60, the Zone 40:

https://www.dropbox.com/s/1c9liddw8if0ct2/zone40.zip?dl=0

I thought it would be u'nSP-based like the Zone 60 and Wireless 60, but it won't run in Unununium, so I don't know what to do with it.

#109818 - 06/06/17 07:56 AM Re: New dumps [Re: Darkstar]  
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Haze Offline
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looks like it might be encrypted

aside from the first 0x8000 block which is all 0x00 the rest of the 'empty' space is filled with either

0x88, 0xbb
or
0x77, 0x44

so if you you either of those patterns as a xor mask you convert those blank areas to 0xff or 0x00 which seems more reasonable, although would need to check if there's any bitswap too.

could of course be done like that to throw people off too.

bit weird the first 0x8000 is just 0x00 tho.

#109822 - 06/06/17 04:09 PM Re: New dumps [Re: Haze]  
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Haze Offline
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Originally Posted by Haze
looks like it might be encrypted

aside from the first 0x8000 block which is all 0x00 the rest of the 'empty' space is filled with either

0x88, 0xbb
or
0x77, 0x44

so if you you either of those patterns as a xor mask you convert those blank areas to 0xff or 0x00 which seems more reasonable, although would need to check if there's any bitswap too.

could of course be done like that to throw people off too.

bit weird the first 0x8000 is just 0x00 tho.


although even if you apply such decryptions there are no vectors in the first area of the rom (0x1ffee)

there do appear to be some vectors, starting after that, starting at 0x21ffee and repeating every(?) 0x200000 after that, but that would give a bank size of 0x200000 and mean the initial bank can't be 0.

unfortunately even if you try using a higher bank, the code isn't valid, so there's probably bitswapping, or additional address line fiddling too (assuming it's a good dump)

#109952 - 06/20/17 08:20 PM Re: New dumps [Re: Darkstar]  
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R. Belmont Online content
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#109953 - 06/20/17 08:23 PM Re: New dumps [Re: Darkstar]  
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rfka01 Offline
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Thanks, RB!
Yeah ... it's currently enjoying its summer holidays on the road smile


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#109980 - 06/24/17 01:34 PM Re: New dumps [Re: Darkstar]  
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rorirub Offline
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Question, what is the preferred naming style for roms that have multiple different labels?
For example if a rom comes in both an uv eprom variant (EPR-16606) and a mask rom one (MPR-16606), but with matching content.

#109983 - 06/24/17 07:19 PM Re: New dumps [Re: Darkstar]  
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BeckieRGB Offline
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Yet another VT-based handheld, and a followup to the Game Prince RS-1 I posted previously, this is the RS-16:

https://www.dropbox.com/s/pyub0x1x5mck5vu/gprnrs16.zip?dl=0

Verified that the menu loads in EmuVT.

#109984 - 06/24/17 10:58 PM Re: New dumps [Re: rorirub]  
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Haze Offline
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Haze  Offline
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Originally Posted by rorirub
Question, what is the preferred naming style for roms that have multiple different labels?
For example if a rom comes in both an uv eprom variant (EPR-16606) and a mask rom one (MPR-16606), but with matching content.


usually just a note is added, unless it's shown that one set always used MPR and another EPR, in which case said names are used.

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