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Old 02 September 2014, 18:47   #585
amilo3438
Amiga 500 User
 
Join Date: Jun 2013
Location: EU
Posts: 1,114
Quote:
Originally Posted by turrican3 View Post
QEMU PPC is still work in progress
great, which speed could we expect ???
Let me answer ...

According to PearPC about page -> http://pearpc.sourceforge.net/about.html

PearPPC emulated CPU runs at speed 1/500th (generic, currently implemented into WinUAE) or 1/15th (JIT-X86, canceled for WinUAE in exchange for QEMU) than the host.


Well, according to above the speed difference is 500/15 = 33 in favor of JIT engine.

Although QEMU JIT engine is much more accurate, I hope there should not be much difference in speed in relation to the canceled PearPPC JIT engine.


Someone somewhere mentioned that he had a feeling that the current (generic) WinUAE PPC emulation runs on 7MHz !?

Therefore, theoretically it could mean that future PPC JIT emulation could work on 7 x 33 => 230 MHz !!! (also depending on the PC processor speed)

I hope that the expectations regarding the JIT-PPC emulation speed is somewhere close enough.


p.s.

According to http://amiga.resource.cx/

Blizzard PPC = PowerPC 603e @ 160 / 200 / 240 MHz

CyberStorm PPC = PowerPC 604e @ 150 / 180 / 200 / 233 MHz


p.s.2.
It might even be possible that emulated PPC is faster than the original, which depends on how modern PC CPU will run.
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