README revision 1d54945d
1 2What works: 3- Supports 8bpp, 15/16bpp, 24bpp and 32bpp. Heavy testing on ViRGE DX. 4- There is some known instability in ViRGE GX2, please report problems. 5- Silken Mouse is enabled by default, use the generic server option of 6 -nosilk to disable it. 7 8XCONFIG options: 9 10The driver supports quite a few different XConfig options, which can 11be used to tune the driver and improve performance. Without any options, 12the driver will use conservative settings which should work on most 13hardware. Large improvements in performance are possible by selecting 14the proper options, which will probably work on most systems. 15 16Cursor: 17 18- "hwcursor" "off" behaves exactly like "swcursor". Default: "on" 19- "swcursor" will disable the HW Cursor. HW Cursor is used by default and 20 no option is needed to enable it. 21 22Display: 23- "ShadowFB" Use shadow framebuffer. Disables HW acceleration. Default: off. 24- "Rotate" " cw "|" ccw " Rotate the screen CW - clockwise or CCW - counter 25 clockwise. Disables HW Acceleration and HW Cursor, uses ShadowFB. 26 Default: no rotation. 27- "XVideo" Disable XVideo support by using the off option. This changes FIFO 28 settings which prevent screen noise for high-res modes. Default: on 29 30Video memory: 31 32- "slow_edodram" will switch the standard ViRGE to 2-cycle edo mode. Try this 33 if you encounter pixel corruption on the ViRGE. Using this option will 34 cause a large decrease in performance. 35- "fpm_vram" will switch the ViRGE/VX to fast page mode vram mode 36- "slow_dram " | " fast_dram" Change Trio 3D and 3D/2X memory options. 37 Default: Use BIOS defaults. 38- "early_ras_precharge", "late_ras_precharge" adjust memory parameters. One 39 of these will us the same settings as your video card defaults, and 40 using neither in the config file does the same. 41- "set_mclk" sets the memory clock, format is: 42 Option "set_mclk" "50000" 43 in the XF86Config file. Valid values are any 44 integer <= 100000, where 100000 == 100 MHz. 45- "set_refclk" sets the ref clock for ViRGE MX, format is: 46 Option "set_refclk" "50000" 47 48Acceleration and graphic engine: 49 50- "NoAccel" turns off all acceleration 51- "fifo_aggressive", "fifo_moderate" and "fifo_conservative" alter the settings 52 for the threshold at which the pixel FIFO takes over the internal 53 memory bus to refill itself. The smaller this threshold, the better 54 the acceleration performance of the card. You may try the fastest 55 setting ("aggressive") and move down if you encounter pixel corruption. 56 The optimal setting will probably depend on dot-clock and on color 57 depth. Note that specifying any of these options will also alter other 58 memory settings which should increase performance, so you should at 59 least use "fifo_conservative" (this uses the chip defaults). 60- Common XAA acceleration options to disable primitives for test purposes: 61 "XaaNoScreenToScreenCopy" 62 "XaaNoSolidFillRect" 63 "XaaNoColor8x8PatternFillRect" 64 "XaaNoImageWriteRect" 65 "XaaNoPixmapCache" 66 67PCI bus: 68- "pci_burst" will enable PCI burst mode. This should work on all but a 69 few "broken" PCI chipsets, and will increase performance. Option may 70 take a parameter "on", "off", "yes", etc... 71- "pci_retry" will allow the driver to rely on PCI Retry to program the 72 ViRGE registers. "pci_burst" must be enabled for this to work. 73 This will increase performance, especially for small fills/blits, 74 because the driver does not have to poll the ViRGE before sending it 75 commands to make sure it is ready. It should work on most 76 recent PCI chipsets. 77 78ViRGE MX LCD options: 79- "lcd_center" 80- "set_lcdclk" allows setting the clock for a ViRGE MX LCD display. Format is: 81 Option "set_lcdclk" "30000" 82 in the config file. Valid values are ? 83 84Debug: 85- "ShowCache" Enable or disable viewing offscreen cache memory. A 86 development debug option. Default: off. 87- "mx_cr3a_fix" Enable or disable a cr3a fix added for ViRGE MX. 88 Default: on. 89 90 91$XFree86: xc/programs/Xserver/hw/xfree86/drivers/s3virge/README,v 1.9 2000/06/14 21:57:54 dawes Exp $ 92