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Haze
Reged: 09/23/03
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Re: All Sega Model 2 chips have been decapped and identified
12/13/17 06:20 PM


> Well a good straight to the point NO there.
>
> What needs to be done now that they are de-capped ?

Update the CPU core(s) so that they're actually capable of running the code for a start. The new dumps show that a lot of existing assumptions were wrong.

HLE is easier than LLE in cases like this, and as ElSemi's Model 2 emulator shows, the HLE of these chips on Model 2 is both mature and functional; actually transitioning it all to LLE will likely result in slower performance, and until all issues have been squashed, more bugs, so no, it's not going to immediately improve the Model 2 emulation in MAME.

Unfortunately the cases where we would see most benefit, Model 1, specifically Virtual Fighter and Star Wars, I don't believe have been decapped yet (as the chips are rather rare) Only Virtua Racing where we were already able to run the game using code taken from a Model 2 game instead. Even hooking up the real code to Virtua Racing has proven to be tricky tho.

I believe Caps0ff would happily do the decaps of the Virtua Fighter and Star Wars chips if they were sent, as they've got a proven method to handle these chips, but they seem to be becoming very rare these days (versus 5-10 years ago) and even just communicating to people that they need to be from Star Wars and Virtua Fighter is becoming difficult as people seem to be forgetting that the various Model 1 games used different boards with different internal code, so just picking up random scrap Model 1 PCBs isn't going to cut it.







Entire thread
Subject Posted by Posted on
* All Sega Model 2 chips have been decapped and identified jasd 12/12/17 03:44 PM
. * Re: All Sega Model 2 chips have been decapped and identified JustNiz  12/14/17 12:41 AM
. * Re: All Sega Model 2 chips have been decapped and identified Olivier Galibert  12/14/17 03:38 PM
. * Re: All Sega Model 2 chips have been decapped and identified agard  12/13/17 01:33 PM
. * Re: All Sega Model 2 chips have been decapped and identified MooglyGuy  12/13/17 02:32 PM
. * Re: All Sega Model 2 chips have been decapped and identified agard  12/13/17 05:58 PM
. * Re: All Sega Model 2 chips have been decapped and identified Haze  12/13/17 06:20 PM
. * Re: All Sega Model 2 chips have been decapped and identified agard  12/13/17 09:18 PM
. * Re: All Sega Model 2 chips have been decapped and identified Haze  12/13/17 09:38 PM
. * Re: All Sega Model 2 chips have been decapped and identified MooglyGuy  12/14/17 02:47 PM
. * Re: All Sega Model 2 chips have been decapped and identified agard  12/17/17 04:57 AM
. * Re: All Sega Model 2 chips have been decapped and identified Jason Thorpe  12/17/17 10:57 PM
. * Re: All Sega Model 2 chips have been decapped and identified Haze  12/17/17 11:07 PM
. * Re: All Sega Model 2 chips have been decapped and identified SmitdoggAdministrator  12/13/17 08:42 PM
. * Re: All Sega Model 2 chips have been decapped and identified Haze  12/13/17 08:51 PM
. * Re: All Sega Model 2 chips have been decapped and identified SmitdoggAdministrator  12/13/17 08:53 PM
. * Re: All Sega Model 2 chips have been decapped and identified Haze  12/13/17 08:55 PM
. * Re: All Sega Model 2 chips have been decapped and identified SmitdoggAdministrator  12/13/17 08:58 PM
. * Re: All Sega Model 2 chips have been decapped and identified Haze  12/13/17 09:02 PM
. * Re: All Sega Model 2 chips have been decapped and identified Olivier Galibert  12/14/17 03:35 PM
. * Re: All Sega Model 2 chips have been decapped and identified SmitdoggAdministrator  12/14/17 07:57 PM
. * Re: All Sega Model 2 chips have been decapped and identified Diet Go Go Fan  12/14/17 08:53 PM
. * Re: All Sega Model 2 chips have been decapped and identified SmitdoggAdministrator  12/14/17 09:45 PM
. * Re: All Sega Model 2 chips have been decapped and identified Haze  12/14/17 03:57 PM
. * Re: All Sega Model 2 chips have been decapped and identified MooglyGuy  12/13/17 07:52 PM
. * Re: All Sega Model 2 chips have been decapped and identified R. Belmont  12/14/17 06:27 PM
. * Re: All Sega Model 2 chips have been decapped and identified VasiliyFamiliya  12/13/17 06:44 AM
. * Re: All Sega Model 2 chips have been decapped and identified Nomax  12/12/17 10:51 PM

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