Basic configuration

# 2 Basic configuration

Contents of this section

It is recommended that you generate an XF86Config file using the ``xf86config`' program, which should produce a working high-resolution 8bpp configuration. You may want to include mode timings in the `Monitor` section that better fit your monitor (e.g 1152x900 modes). The driver options are described in detail in next section; here the basic options are hinted at.

For all chipsets, a `Clockchip "cirrus"` line in the `Device` section can be useful. This allows the use of any dot clocks, instead of one out of the fixed set of dot clocks supported by the driver. This is required if you want a 12.6 MHz dot clock for low-resolution modes.

If graphics redrawing goes wrong, first try the `"no_bitblt"` option if your chip has the BitBLT engine, if that doesn't work, try the `"noaccel"`; option, which disables all accelerated functions. The `"no_imageblt"` option may be sufficient.

In order to be able to run at a depth of 16bpp and 32bpp, and to improve performance at 8bpp, linear addressing must be enabled. This is generally possible on 543x local bus cards, and if you have less than 16Mb of system memory, on local bus 542x cards and ISA 543x cards. You must specify the `"linear"` option and possibly a `Membase` address. See the following sections for a detailed description.

Lastly, on the 543x, it is advisable to use the `"mmio"` option in the Device section for better acceleration (this might also apply to the 5429, which has not been tested).

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