Re: Problems in "Modernizing" a //gs

[GUDATH@EZINFO.VMSMAIL.ETHZ.CH (Henrik 'Ratte' Gudat)]

In <B06C0EB9966828FEA@slip129-37-106-176.wa.us.ibm.net> bjblackbear@ibm.net writes:
> >Real world results disprove this conjecture.  The "Bernie II" emulator
> >written by [me, see below], running on a kick-butt
> >PowerMac, can't match my real 13.75MHz GS in running GS software with
> 
> Come ON, be realistic. Bernie II is emulating the entire hardware of the 
> IIgs; graphics, audio, disk I/O. Ask Henrik to give you his 65816 engine 
> bare and run it flat-out on the same machine. I guarantee you it will be 
> orders of magnitude faster.

Two corrections here:
- the emulation core was written by Dr. ShadowWrite Andre Horstmann. I was
  just cheerleading.
- 13.75 Mhz is way too low. A 603e/200Mhz Mac already scratches
  the 20Mhz (22Mhz peak, 16Mhz+ typical), so expect much better
  performance on a "kick-butt" system (like a Mach5/300 or a G3).
 
It is very difficult to provide figures for emulation software because there's
no linear correlation between clock speed of the physical and the virtual
system. It also depends on what type of software you are running. A single
instruction can trigger a long sequence of actions that you would get for free
on the IIgs.

- henrik