The following options are of particular interest to the Chips and Technologies driver. If you are driving the video memory too fast too high a MemClk you’ll get pixel corruption as the data actually written to the video memory is corrupted by driving the memory too fast. The HiQV series of chips have three programmable clocks. This is a driver limitation that might be relaxed in the future. The clocks in the x series of chips are internally divided by 2 for 16bpp and 3 for 24bpp, allowing one modeline to be used at all depths. However, 8 and 24 bit colour depths seem to work fine. For this reason, the maximum colour depth and resolution that can be supported in a dual channel mode will be reduced compared to a single display channel mode.

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In general there are two factors determining the maximum dotclock.

Chips and Technologies 68554 Video Driver

It is believed ttechnologies this is really just a with a higher maximum dot-clock of 80MHz. Hi-Color and True-Color modes are implemented in the server. The ” FixPanelSize ” can be used to force the hechnologies values into the panel size registers. It also has higher limits on the maximum memory and pixel clocks Max Ram: The server doesn’t prevent the user from specifying a mode that will use this memory, it prints a warning on the console.

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Chips and Technologies – Wikipedia

Possibly useful if you wish to use an old workstation monitor. However, 8 and 24 bit colour depths seem to work fine. The reason for this is that the manufacturer tehcnologies used the panel timings to get a standard EGA mode to work on flat panel, and these same timings don’t work for an SVGA mode.

This sets the default pixel value for the YUV video overlay key.

Note that all of the chips except the rev A are 3. Try reducing the clock. It doesn’t occur under UnixWare 2. Further to this some of the XAA acceleration requires that the display pitch is a multiple of 64 pixels. This cjips been reported on some configurations. The server itself can correctly detect the chip in the same situation.

It is completely ignored for HiQV chipsets. This option forces the second display to take a particular amount of memory. It is possible to use the fixed clocks supported by the chip instead by using this option. The Chips chils Technologies chipsets supported by this driver have one of three basic architectures.

Many LCD displays are incapable of using a 24bpp mode. For the HiQV series of chips, the memory clock can be successfully probed.


An 8bpp one and a 16bpp one.

This also gives more memory bandwidth for use in the drawing operations. Dual refresh rate display can be selected with the ” DualRefresh ” option described above. Use caution with this option, as driving the video processor beyond its specifications might cause damage. None technoloties these are currently supported within the driver itself, so many cards will only have limited support.

Information for Chips and Technologies Users

This option might be used if the default video overlay key causes problems. Linear addressing is not supported for this card in the driver. Using these should give you all the capabilities you’ll need in the server to get a particular mode to work.

If this is a problem, a work around is to remove the ” HWcursor ” option. So this limit will be either 56MHz or 68MHz for the xx chipsets, depending on what voltage they are driven with, or 80MHz for the WinGine machines.

The HiQV cihps of chips have three programmable clocks. It is possible to turn the linear addressing off with this option.

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