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Re: Software Lists project [Re: Mitch] #87942 05/01/13 09:15 PM
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F1ReB4LL Offline
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Originally Posted By Mitch
For those two you mentioned you'll notice that they are listed as Alpine ROMs and not cart ROMs which is likely why the checksum is different.

Hmm, interesting. And why not to add Alpine ROMs into softlist marked as (Alpine)?

Re: Software Lists project [Re: Shideravan] #87949 05/02/13 05:11 AM
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etabeta78 Offline
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why not to explain what an Alpine ROM is and where it comes from, instead of presuming everyone knows?
(and no, google is not my friend, since the only links I've found tell me where the data goes, not where the ROM come from)

Re: Software Lists project [Re: Shideravan] #87951 05/02/13 06:50 AM
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Mitch Offline
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An alpine ROM means it doesn't have the encryption header. So it loads at a slightly different address. Standard carts start at address $800000, alpine is at $802000. The alpine board was Atari's development system for the Jaguar.

Mitch

Re: Software Lists project [Re: Shideravan] #87952 05/02/13 07:45 AM
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etabeta78 Offline
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so those dumps come from real hw, even if a dev board, right?
then it would be interesting to handle them in emulation smile

thanks for the explaination!

Re: Software Lists project [Re: Shideravan] #87958 05/02/13 12:06 PM
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Robbbert Offline
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Those files were handled in emulation (.rom file) until recently, when someone broke the loading.

Re: Software Lists project [Re: Robbbert] #88119 05/06/13 07:05 AM
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etabeta78 Offline
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Originally Posted By Robbbert
Those files were handled in emulation (.rom file) until recently, when someone broke the loading.


did it break with Ville's changes? earlier? later?
an approximate regression version might help to fix it...

Re: Software Lists project [Re: Shideravan] #88120 05/06/13 07:23 AM
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LoganB Offline
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I'm not sure, but I think it came after the checksum checking was implemented.

Re: Software Lists project [Re: Shideravan] #88121 05/06/13 07:42 AM
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Haze Offline
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the previous code faked the entire startup, bypassing the checksum and forcing the expected string into shared RAM because the CPU cores were so buggy they couldn't even calculate a checksum properly.

I wouldn't say Ville broke the rom loading, he just made it work properly, and reject invalid / bad dumps like the system would.

The original dev units would have used a different bios.

Re: Software Lists project [Re: Shideravan] #88123 05/06/13 08:03 AM
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etabeta78 Offline
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thanks for the explanations. for the moment we have included the .rom dumps converted to bin/j64, so things can be at least tested, but it would be good to obtain a dump of the dev units

Re: Software Lists project [Re: Shideravan] #88125 05/06/13 09:31 AM
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LoganB Offline
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I actually have the roms for two of the dev units. They're in No-intro as the "Stubulator" roms. Before I forget, Mitch had also confirmed the bios rom for the M-series Jaguar, which was manufactured by JVC, rather than IBM (source).

ETA: Forcing MESS to load these roms in place of the standard Jaguar bios, loads them properly, but don't get further than the initial boot screen.

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