Keywords: slow emulation,Video Configuration

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## Video

Video Configuration

This window sets various graphics emulation options.

Full Screen Settings

Full Screen

Check this checkbox to enter full screen mode.

Alternatively, you can use a hotkey (Alt+Enter by default) or a double-click (if the "Switch fullscreen by double-click" option is enabled in GUI options).

Enter full screen mode after game is loaded

If checked, FCEUX will enter full screen mode when a game is loaded.

Hide mouse cursor

If checked, FCEUX will hide mouse cursor when in full screen mode.

Mode

Sets the image size during full screen mode. By default this is automatically set to match current display resolution. You can change the resolution by entering different values.

Special Scaler

Within this box is eight options: hq2x, Scale2x, NTSC 2x, hq3x, Scale3x, Prescale2x, Prescale3x, and Prescale4x.

- Scale2x/3x just attempts to render out the corners of the pixels to make them look a bit rounder. "2x" means two times bigger than 1x1 and "3x" means three times bigger than 1x1.

- Hq2x/3x does a much better job than scale2x/3x by smearing the pixels together with a slight blur. However, Hq2x/3x requires a faster computer for decent speed (at least 1 GHz and above). "2x" means two times bigger than 1x1 and "3x" means three times bigger than 1x1.

- NTSC 2x simulates visual artifacts that are produced by analog (composite) video sygnal that the real console generates.

- Prescale2x/3x/4x upscales the source picture using a pixel based (nearest neighbor) algorithm, that allows to change the level of interpolation, applied when using hardware acceleration.

Sync Method

If the emulator is running poorly, trying out these sync options can help make it run smoother (fix image tearing).

DirectDraw

If the image is blurry, here you can disable hardware acceleration.

Windowed Settings

Size Multiplier

Takes the image size and multiples the X and Y by a specific amount. You can also change these by clicking and dragging the border of the FCEUX window.

Force Integral Scaling Factors

If checked, FCEUX window can only be stretched by even amounts (1x, 2x, 3x, etc.). If unchecked, it can be stretched by any amount.

When you are resizing FCEUX window by dragging its borders, you can hold Shift to temporarily invert this option.

Force Aspect Ratio Correction

Checking this will only allow the correct aspect ratio while resizing the window.

Special Scaler

Within this box is eight options: hq2x, Scale2x, NTSC 2x, hq3x, Scale3x, Prescale2x, Prescale3x, and Prescale4x.

Sync Method

If the emulator is running poorly, trying out these sync options can help make it run smoother (fix image tearing).

DirectDraw

If Vsync doesn't work, here you can enable hardware acceleration.

The following options affect both Fullscreen and windowed mode.

Aspect ratio

Best Fit

This is checked by default, so FCEUX will automatically maintain correct aspect ratio for any size of the window. If you uncheck this, the image will be stretched to fill the whole window area.

BG color

When window size is wider or taller than image size, empty areas of the window are colored black by default. Checking this option will color these areas according to current "background" color of NES palette.

Square pixels

This is checked by default, so FCEUX will limit the max size of the image to make all pixels share the same width/height. If you uncheck this, the image will be stretched to fill the whole width or height of the window area.

TV Aspect

Check this if you want to change the image aspect ratio (e.g. to 4:3). You can enter different values in adjacent text fields.

Drawing Area

First Line

Sets the first scan line for NTSC and PAL Modes. This should be left on the default of 8 for NTSC and 0 for PAL.

Last Line

Sets the last scan line for NTSC and PAL Modes. This should be left on the default of 231 for NTSC and 239 for PAL.

Clip left and right sides (8 px on each)

If enabled, 8 pixels from each side of the windows will be removed. Some NES games show grapical artifacts on the sides of screen when scrolling (on real hardware too!), so you may hide those artifacts by checking the option.

Emulation

Allow more than 8 sprites per scanline

On real NES hardware, more than 8 sprites on the screen causes flickering. Enabling this option can reduce flickering by allowing more sprites to be visible at once. But if you prefer to stay "true" to NES hardware, this should not be checked, because some games rely on the limitation.

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