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Merge pull request #689 from TomHarte/STScreenshot

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Adds a token Atari ST screenshot.
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Thomas Harte 2019-12-17 23:29:43 -05:00 committed by GitHub
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@ -59,9 +59,6 @@ If your machine has a 4k monitor and a 96Khz audio output? Then you'll get a 4k
|![Amstrad text, with a classic 1:1 pixel emulation](READMEImages/NaiveCPC.png)|![Amstrad text, with correct aspect ratio and subject to a lowpass filter](READMEImages/FilteredCPC.png)| |![Amstrad text, with a classic 1:1 pixel emulation](READMEImages/NaiveCPC.png)|![Amstrad text, with correct aspect ratio and subject to a lowpass filter](READMEImages/FilteredCPC.png)|
|![The Amstrad CPC version of Stormlord, with a classic 1:1 pixel emulation](READMEImages/NaiveCPCStormlord.png)|![The Amstrad CPC version of Stormlord, with correct aspect ratio and subject to a lowpass filter](READMEImages/CPCStormlord.png)| |![The Amstrad CPC version of Stormlord, with a classic 1:1 pixel emulation](READMEImages/NaiveCPCStormlord.png)|![The Amstrad CPC version of Stormlord, with correct aspect ratio and subject to a lowpass filter](READMEImages/CPCStormlord.png)|
<img src="READMEImages/ReptonInterlaced.gif" height=400 alt="Repton title screen, interlaced"><img src="READMEImages/AppleIIPrinceOfPersia.png" height=400 alt="Apple IIe Prince of Persia">
<img src="READMEImages/MusicWorks.png" height=400 alt="Apple Macintosh MusicWorks">
## Low Latency ## Low Latency
The display produced is an emulated CRT, with phosphor decay. Therefore if you have a 140Hz monitor it can produce 140 distinct frames per second. Latency is dictated by the output hardware, not the emulated machine. The display produced is an emulated CRT, with phosphor decay. Therefore if you have a 140Hz monitor it can produce 140 distinct frames per second. Latency is dictated by the output hardware, not the emulated machine.
@ -74,10 +71,8 @@ A corollary of emulating the continuous nature CRT, not merely performing end-of
Cycle-accurate emulation for the supported target machines is fairly trite; this emulator seeks to follow that precedent. All emulation logic is written in C++ for explicit control over costs but, where a conflict arises, the presumption is towards clarity and simplicity of code. This emulator is willing to spend the processing resources available on modern hardware. Cycle-accurate emulation for the supported target machines is fairly trite; this emulator seeks to follow that precedent. All emulation logic is written in C++ for explicit control over costs but, where a conflict arises, the presumption is towards clarity and simplicity of code. This emulator is willing to spend the processing resources available on modern hardware.
Self-ratings: ## Additional Screenshots
* the Electron, Oric and Vic-20 are pretty much perfect;
* the ZX80, ZX81, ColecoVision, MSX 1 and Apple IIs are very strong; <img src="READMEImages/AppleIIPrinceOfPersia.png" height=400 alt="Apple IIe Prince of Persia">
* the Master System is almost perfect, access windows and CRAM dots and all the rest, but further work is required on some small aspects of behaviour; <img src="READMEImages/MusicWorks.png" height=400 alt="Apple Macintosh MusicWorks">
* the Amstrad CPC has known accuracy deficiencies in its 8272 and 6845; <img src="READMEImages/STStuntCarRacer.png" height=400 alt="Atari ST Stunt Car Racer">
* the Atari 2600 has some known accuracy deficiencies in its TIA;
* the C-1540(/1) is locked in reading mode and doesn't yet support writing.

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