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Re: SVN builds - new driver flood [Re: Anna Wu] #50140 05/17/09 04:28 PM
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R. Belmont Online Content
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Skeletons generally shouldn't crash, that's about the only rule with them.

Re: SVN builds - new driver flood [Re: Anna Wu] #50141 05/17/09 06:09 PM
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Anna Wu Offline OP
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SVN revision 4723

Windows GUI

If I try to start any FM-Towns skeleton driver I get following error message:

i386: Invalide opcode FF at FFFFFFF1


Last edited by Anna Wu; 05/17/09 06:10 PM.
Re: SVN builds - new driver flood [Re: Anna Wu] #50142 05/17/09 08:27 PM
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Anna Wu Offline OP
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I test more than 60 new skeleton driver. It seems, I have only the problem with the FM-Towns/Marty skeleton driver.

Last edited by Anna Wu; 05/17/09 08:27 PM.
Re: SVN builds - new driver flood [Re: Anna Wu] #50144 05/17/09 10:39 PM
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MooglyGuy Offline
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That isn't a crash, it's a fatal error.

Re: SVN builds - new driver flood [Re: MooglyGuy] #50147 05/17/09 10:49 PM
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I don't know about MESSUI, but in commandline versions a fatal error may as well be a crash.

Re: SVN builds - new driver flood [Re: R. Belmont] #50148 05/17/09 10:59 PM
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MooglyGuy Offline
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I don't know about you, but given that the only alternative is to be completely silent and/or to actually segfault, I would much rather the i386 core call fatalerror() when it hits an unknown opcode due to a driver's skeletal nature causing the BIOS run off into the weeds.

Re: SVN builds - new driver flood [Re: R. Belmont] #50149 05/18/09 06:45 AM
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Anna Wu Offline OP
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I tried to start the driver on commandline too.

i386: Invalide opcode FF at 000FC001



New SVN build 4732 (Pentium default/Pentium with symbols) from Bobz.
My test computer:
DELL C840
Mobile Intel(R) Pentium(R) 4 - M CPU 1.80GHz
WinXP Pro SP2




Last edited by Anna Wu; 05/18/09 06:57 AM.
Re: SVN builds - new driver flood [Re: Anna Wu] #50150 05/18/09 07:09 AM
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yeah, it's a problem of incomplete i386 emulation. as long as there are no improvements into the MAME core, the FM Towns driver will keep crashing.

it is one of the reasons this is only a skeleton wink
Thanks for testing


Re: SVN builds - new driver flood [Re: etabeta78] #50164 05/19/09 12:32 PM
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mahlemiut Offline
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The fatal error occurs whenever the program starts running on some part of RAM or ROM that it shouldn't. Anyway, it now runs a touch longer (about one second ;)) before a fatal error.

Hopefully, protected mode isn't needed for booting (and it has MS-DOS on ROM, so shouldn't be needed there either), so maybe one day it'll do something useful. smile Not that figuring out all the hardware that it does have and how it works won't be easy.


- Barry Rodewald
Re: SVN builds - new driver flood [Re: mahlemiut] #50165 05/19/09 02:22 PM
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Anna Wu Offline OP
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Originally Posted By mahlemiut
The fatal error occurs whenever the program starts running on some part of RAM or ROM that it shouldn't. Anyway, it now runs a touch longer (about one second ;)) before a fatal error.
Hopefully, protected mode isn't needed for booting (and it has MS-DOS on ROM, so shouldn't be needed there either), so maybe one day it'll do something useful. smile Not that figuring out all the hardware that it does have and how it works won't be easy.


Great, you make me for one second happy. smile

Last edited by Anna Wu; 05/19/09 02:22 PM.
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