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AaronGiles
Galaxiwarrior
Reged: 09/21/03
Posts: 1343
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Re: MAME 0.141
01/01/11 09:43 PM


> > Fixed Bullet key back to what we dumped from original PCB.
> > [Aaron Giles]
>
> What's the full story on this one?

It was purchased for an enormous amount of money from hoarders in Japan. Charles MacDonald dumped the FD1094.

Chris Hardy examined the dumped key in detail and detected what appeared to be a single bit error. (We have seen them before in FD1094 dumps, and the proposed fix did correct what appeared to be incorrect disassembly.)

H*ze pointed out that the key as originally dumped fixed the second level crash problem, while the version with the single bit "fix" caused it to happen again, so we reverted to the version that was dumped.

The fact that the proposed fix was completely plausible also helps to explain why my hand-constructed key had the same problem, because I too had assumed that the bit in question was set such that the disassembly would come out right.







Entire thread
Subject Posted by Posted on
* MAME 0.141 ShimaPong 01/01/11 04:52 AM
. * Re: MAME 0.141 ShimaPong  01/02/11 04:09 PM
. * Re: MAME 0.141 ShimaPong  01/03/11 05:05 PM
. * Re: MAME 0.141 ShimaPong  01/04/11 03:38 PM
. * Re: MAME 0.141 ShimaPong  01/05/11 03:25 PM
. * Re: MAME 0.141 SmitdoggAdministrator  01/03/11 05:27 PM
. * Re: MAME 0.141 Shoegazr  01/01/11 05:31 PM
. * Re: MAME 0.141 Cyberzinho Punk  01/01/11 03:56 PM
. * Mambo A Go-Go ShimaPong  01/01/11 03:37 PM
. * Re: Mambo A Go-Go Alexis B.  01/01/11 05:44 PM
. * Re: MAME 0.141 CptGuapo  01/01/11 06:01 AM
. * Re: MAME 0.141 redk9258  01/01/11 06:54 AM
. * Re: MAME 0.141 R. Belmont  01/01/11 05:07 AM
. * Re: MAME 0.141 krick  01/01/11 09:30 AM
. * Re: MAME 0.141 AaronGiles  01/01/11 09:43 PM
. * Re: MAME 0.141 sev  01/02/11 12:44 PM
. * Re: MAME 0.141 R. Belmont  01/01/11 07:56 PM
. * Re: MAME 0.141 AaronGiles  01/01/11 09:37 PM
. * Re: MAME 0.141 Derrick Renaud  01/01/11 11:26 PM
. * Re: MAME 0.141 R. Belmont  01/02/11 02:07 AM
. * Re: MAME 0.141 gregf  01/01/11 08:54 AM
. * Re: MAME 0.141 R. Belmont  01/01/11 09:01 AM
. * Re: MAME 0.141 tamalmalamarrado  01/01/11 05:28 AM
. * Re: MAME 0.141 abelenki  01/01/11 04:59 AM
. * Re: MAME 0.141 redk9258  01/01/11 05:31 AM
. * Re: MAME 0.141 hap  01/01/11 04:53 PM

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