Emulator evaluation tools

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Quick evaluation


Z80 CPU


Diagnostics


Amstrad Plus


Colorimetry

  • Border 8 on real CPC

  • Border 8 on real Plus

  • Border 8 on emulators

  • Palette on real CPC

  • Palette on real Plus

  • Palette on emulators

  • Still The One on real CPC

  • Still The One on emulators

  • CPC DiAG on real Plus

  • CPC DiAG on emulators

  • Scanlines on GT65

  • Slot mask on CTM

  • CRT mask types

  • CPC DiAG also shows that the primary colours themselves are a bit different. Blue is more vivid and Green is less fluorescent on Amstrad displays.
  • Colours are less saturated and black is not as profound on CRT monitors than they are on modern displays.
  • On CRT displays, bright pixels will spill on their neighbours while dark pixels will get eaten by their neighbours (ie. bright pixels are bigger than dark pixels on CRT displays), affecting dithered colours. This effect is absent on LCD displays.
  • The usual scanline effect of CRT monitors is barely noticeable on the Amstrad CTM colour monitor. But it is very pronounced on Amstrad monochrome monitors.
  • The slot mask is the texture that is visible in the CTM colour monitor. CRT masks do not exist on monochrome monitors.
  • To test emulators VSYNC (screen-tearing and frame skipping): Source
border 22,17:ink 0,4,9:speed ink 1,1


Graphics


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