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Author Topic: OK... why no new 68K boards?  (Read 6695 times)

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Offline little

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Re: OK... why no new 68K boards?
« on: February 10, 2009, 12:00:09 AM »
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I´ve heard some good news from some friends about Freescale

If you have not signed a NDA then spill the beans already, it is not like we haven't been waiting for years to learn what exactly the new v5 coldfire will offer.
 

Offline little

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Re: OK... why no new 68K boards?
« Reply #1 on: February 10, 2009, 04:42:28 PM »
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Sorry, I´m not allowed to do that, unfortunately

 Give us at least an approximate date, like 3rd quarter of  the year.
 Anyhow, my bet is full 32 bit emulation (68020/30/40 and maybe even 60). Why not include the 68000? because it (like the intel procesor prior to VT-x AMD-v) cannot be virtualized and a fast enough coldfire should be able to trap instructions and easily emulate a 68000 at say 28 mhz (fast enough for any games) and any games/applications requiring more speed were compatible with the 68020 and upwards.
 

Offline little

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Re: OK... why no new 68K boards?
« Reply #2 on: February 10, 2009, 06:55:18 PM »
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sort out the incompatible instructions (instructions that don't work the same way as the original 68k equivalents) and rip out the entire Coldfire supervisor mode,

If they run a virtual 32-bit 680x0 in it's own thread there is no need to remove anything from the original coldfire, so the main OS would run in coldfire mode and any apps requiring 68020+ mode would run in a separate thread, with it's own supervisor mode. Worst case scenario, if the 68020 thread goes bonkers (guru meditation anyone?) then the main os simple ends it without any danger to the main system stability.
 

Offline little

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Re: OK... why no new 68K boards?
« Reply #3 on: February 10, 2009, 11:23:12 PM »
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Then why bother with a ColdFire?!?! If you are going to that trouble...

1. it is cheap
2. it would be the best hardware emulation solution (if my supposition is right).
3. would be a true roadmap to leverage legacy and at the same time access modern hardware.

AFAIL powerpc was never Motorola's idea, more like Apple and IBM making a deal with motorola to create a new cpu architecture where EVERYONE would have ip rights, not just motorola.

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E-UAE was not really on par with WinUAE

I always wonder why there is no bounty to update e-uae up to date where winuae is right now.