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Old 25 August 2019, 06:55   #94
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Join Date: Nov 2008
Location: Sofia / Bulgaria
Posts: 210
Originally Posted by nobody View Post
The fastest Spectrum emulator I tried on A500 was running about 50% of real speed with ACA500+ 68000 @21 mhz. As per my calculations you would need a 68020@28 mhz for 100% speed. Talking about 48k only emulation.
Don't forget this is interpretive emulation - i.e. the emulator doesn't know what instructions are coming next, so it waits and executes the instructions one by one. With the cases of Pac-Man and Space Invaders, you already have the whole game code loaded at startup, which allows for some speed-ups or even interpreting all the code in advance, which gives speed. There is such binary translator for Amiga for Atari 2600 - which shows very good speed for Atari 2600 emulation. Some years ago I translated many Atari 2600 cartridges

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