The Linux/m68k Frame Buffer Device : Converting XFree86 timing values into frame buffer device timings
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7. Converting XFree86 timing values into frame buffer device timings

An XFree86 mode line consists of the following fields:

    "800x600"     50      800  856  976 1040    600  637  643  666
    < name >     DCF       HR  SH1  SH2  HFL     VR  SV1  SV2  VFL
    

The frame buffer device uses the following fields:

pixclock

pixel clock in ps (pico seconds)

left_margin

time from sync to picture

right_margin

time from picture to sync

upper_margin

time from sync to picture

lower_margin

time from picture to sync

hsync_len

length of horizontal sync

vsync_len

length of vertical sync

Pixelclock

Horizontal timings

Vertical timings

Good examples for VESA timings can be found in the XFree86 source tree, under xc/programs/Xserver/hw/xfree86/doc/modeDB.txt.


The Linux/m68k Frame Buffer Device : Converting XFree86 timing values into frame buffer device timings
Previous: Video Mode Timings
Next: References