Calculator for video timings v. 1.6

Select the screen mode timings: Custom screen mode VGA 640x480 60Hz VGA 640x480 72Hz VESA 640x480 75Hz VESA 640x480 85Hz SVGA 800x600 56Hz VESA 800x600 60Hz VESA 800x600 72Hz VESA 800x600 75Hz VESA 800x600 85Hz VESA 1024x768 60Hz VESA 1024x768 70Hz VESA 1024x768 75Hz VESA 1024x768 85Hz VESA 1152x864 75 Hz VESA 1152x864 85 Hz VESA 1152x882 70Hz VESA 1152x882 85Hz VESA 1280x1024 60Hz VESA 1280x1024 75Hz VESA 1280x1024 85Hz VESA 1600x1200 60Hz VESA 1600x1200 70Hz VESA 1600x1200 75Hz VESA 1600x1200 80Hz VESA 1600x1200 85Hz Special 1920x1080 60 Hz VGA to TV converter 640x480 50 Hz (PAL) VGA to TV converter 640x480 60 Hz (NTSC) VGA to TV converter 800x600 50 Hz (PAL) 640x480 NTSC TV interlaced 640x480 PAL TV interlaced 800x600 PAL TV interlaced HDTV 1920x1034i 60 Hz

Or give Xfree86 modeline to import:

Graphics card parameters to fill and modify

General parameters Pixel clock frequency MHz Interlace
Horizontal timing parameters Resolution pixels Front porch pixels Sync pulse pixels, polarity (0=NEGATIVE,1=POSITIVE) Back porch pixels	Vertical timing parameters Resolution lines Front porch lines Sync pulse lines, polarity (0=NEGATIVE,1=POSITIVE) Back porch lines

Move picture:

This page lists the most commonly used resolutions and refresh rates that you can modify. You can modify all the parameters you want. The you can use any combination of H and V resolution (ok, number of pixels) and refresh rate that are supported by your operating system, graphics card and your monitor. Windows is pretty much limited on what resolutions it can use, but with X you can pratcially use almost any any combination of H and V resolution (ok, number of pixels) and the limit is the card (clock and RAM) and the monitor capabilities.

Note 1: Actual vertical and horizontal refresh rated depend on the screen resolution, vidoe clock rate and some other numbers (porch and sync pulses).

Note 2: The horizontal timing parameters must be normally to be multiple of 8 because this is the resolution which stadard VGA cards operate in those timings and same applies to most of SVGA cards also.

Note 3: Screen mode settings do not set the sync signal polarity because the needed sync signal polarity depends on the monitor and screen mode used. If you do not know what polarity is needed try first to check both negative. Sync signal polarity settings do not affect the timing calculations. Sync signal polarities affect only to the generated configuration files.

Note 4: Moving picture the picture to the extreme positions may result unstable picture on the monitor.

Note 5: The screen mode settings are general settings usually targeted for 8 bpp (256 colors) modes. On some higher color modes some graphics cards seem to have some limitations what horizontal resolution settings can be (a multiple of 32 pixels in some cards). This might cause that all settings might not work with all card in all modes. Because of large variety of graphics cards and operating systems, not all combinations of things could have been tested. If something does not work for you, then try some other settings or try to modify the mode to suit better to your card (if you know what to correct).

Note 6: In interlaced modes the vertical sync timing parameters are per interlaced field. Interlace draws only half of the screen each refresh, doubling the effective refresh rate. Interlaced modes are well known for their high flicker, but a 60Hz interlaced mode looks much better than a 30Hz non-interlaced mode.

Note 7: Horizontal Sync Time typically varies form 3.5 to 4.0 microseconds in normal PC monitor applications. Vertical Sync Time usually varies from 50 to 300 microseconds.

Press when you want to get the results.

Calculated results

Numerical results

Horizontal sync frequency is kHz and vertical sync frequency is Hz. Field rate is Hz.

Horizontal sync pulse length is microseconds and vertical sync pulse length is microseconds.

Horizontal total is pixels and vertical total lines.

If you want to test other values then fill in new values and press calculate again.

Configuration files

NOTE: The following configuration files are calculated from the data above. There no guaantee that the calculated configuration files work on your system. Use the configuration files at your own risk. In some unfortunate cases it is possible that you damage your monitor or mess up your graphics card driver settings.

Xfree86 modeline:

Matrox Windows driver custom monitor settings:

Windows95 monitor.inf file modeline:
Note: Windows monitor .INF file contains only the screen refresh rate and sync polarity information. It does not contain screen position information.