64KB is correct, there is no problem.
No, don't change unique_ptr to u8, NVRAM is 16-bit.

Well, I've changed it back to u16, but it's still not working.
There's nothing saved in nvram at all (all bytes are always 0xff), and MessUI crashes sometimes when I start the Premiere engine, sometimes when I close the engine.

Are all 3 values 0x10000 in my previous posting really correct?
Or could it have to do something with "rs232" or "usart" that you've added in your new driver? Maybe these devices didn't work correctly in MAME 0.220?

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Elite Premiere should work fine without the USART.

m_nvrambank->configure_entries(0, 2, m_nvram, 0x8000);
I noticed a bug. Change to:
m_nvrambank->configure_entries(0, 2, m_nvram_data, 0x8000);

Hallo Franz,
nur mal zur Info: Die echte Premiere speichert auch nix ... weder der Fidelity Teil, noch der Vancouver ... obwohl sie es laut Handbuch sollen können und sogar eine Speicherbatterie im Gerät ist ...

Gruß,
Sascha

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Well, with this change the compiler gives an error

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I don't know, try other things, like m_nvram_data.get() or &m_nvram_data.get() or (void*)m_nvram_data, etc.

@Mythbuster are you sure the battery wasn't dead? Or something broke?
The PCB has two 32KB CMOS RAM chips, a battery, and a Dallas DS1210. And in MAME, I can see it writing to it.
I haven't tried saving whole games.

None of these methods compile - I give up ...

Edit: I've made the same changes long time ago in the saitek_stratos driver, and there it worked with m_nvram_data.get().
Maybe the problem for the Prestige is, that it uses ENDIANNESS_BIG?

Thanks,
Franz

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ENDIANNESS_BIG, ENDIANNESS_LITTLE, will make no difference.

Try this then:
std::unique_ptr u8[] m_nvram_data;
m_nvram_data = make_unique_clear u8[] (0x10000);

Otherwise, I don't know why it won't work.

OMG, I'm really stupid!
I've made the last changes in my backuped driver instead of the sources folder, so the compiler didn't see my different trials.

Now I've used the right place and the correct entry is the same that I've used in the saitek_strotos driver, i.e. 'm_nvram_data.get()' - now the Prestige is compiling AND working correctly, and it also saves changed settings (e.g. level) in the nvram!

Sorry for the troubles and thanks again for your hints - without you I would have overlooked this 'm_nvram_data.get().

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Two different machines, and I changed the battery ... so I think, it is a general problem ...

And this unit was brand new an unused: https://www.schachcomputer.info/foru...php?albumid=89

So, yes, battery was the first I was also thinking of ... but does not help ...

Greets,
Sascha

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