How to add an (S)VGA driver to XFree86 : The Driver Itself : The Restore() function
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## 6.7. The Restore() function

The Restore() function is used for restoring a saved video state. Note that `restore' is a bit of a misnomer - this function is used to both restore a saved state and to install a new one created by the server. The Restore() function must complete the following actions:

1. Ensure that Bank 0 is selected, and that any other state information required prior to writing out a new state has been set up.
2. Call vgaHWRestore() to restore the generic VGA portion of the state information. This function is in the vgaHW.c file.
3. Restore the chipset-specific portion of the state information. This may be done by simply writing out the register, or by doing a read/modify/write cycle if only certain bits are to be modified. Be sure to note the comment in the sample driver about how to handle clock-select bits.

How to add an (S)VGA driver to XFree86 : The Driver Itself : The Restore() function
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Next: The Save() function