IBM/ATI 8514/A side:
Made mode switches more immediate when actually switching from VGA to 8514/A and viceversa.
Tseng ET4000AX/W32 series side:
Actually use bit 2 of index 0x3f for the horizontal blank start bit 8 instead of bit 4 (horizontal retrace start), fixes skew issues with the et4000w32i rev B. card with resolutions like 1024x768 at 15 or 16bpp and others.
* Fix duplicated logic in vid_svga.c
* Voodoo 3/Banshee emulation now has blanking extensions applied
* S3 ViRGE and Matrox video cards as well
* Tseng ET4000-series cards as well
* Fix off-by-one error in vid_cl54xx.c
Trident cards are yet to be investigated. XGA and 8514/A are yet to be made blanking extensions compliant. Mach64, Paradise/WDC and OAK OTI cards remain as-is for now.
1. The passthrough from VGA to 8514/A and/or 8514/A to VGA no longer relies on hackish places where to switch from/to, instead, relying on port 0x3c3 of VGA doing so (though the Mach8/32 still needs some places where to manually switch from/to, mainly the MCA one when configuring the EEPROM).
2. Implemented the MCA behalf of the Mach32 and its corresponding reset function.
3. Properly implemented (more or less) true color, including 24-bit BGR rendering
4. Other fixes such as color patterns and mono patterns being more correct than before in various operating systems and in 24-bit true color.
5. Implemented the onboard Mach32 video of the IBM PS/ValuePoint P60 machine.
6. Made the onboard internal video detect when it's 8514/A compatible or not (CGA/EGA/MDA/VGA/etc.). If the former is selected, then the video monitor flag is used instead (for QT).
7. The TGUI9400 and 9440, if on VLB, now detect the right amount of memory if on 2MB.
8. Initial implementation of the ATI 68875 ramdac used by the Mach32 and made the ATI 68860 8514/A aware when selected with the Mach32AX PCI.
9. Separated the 8514/A ramdac ports from the VGA ramdac ports, allowing seamless transition from/to 8514/A/VGA.
10. Fixed a hdisp problem in the ET4000/W32 cards, where it was doubling the horizontal display in 15bpp+ graphics mode.
11. Removed the 0x3da/0x3ba port hack that was on the Mach8/32 code, relying on the (S)VGA core instead.
12. Reworked and simplified the TGUI9440 pitch register based on logging due to no documentation at all.
Also fixed are the blitter patterns in 8/15/16bpp modes by re-ordering (if it's the right term) the pixels of the Y pattern coordinates (code lines are from 1165 to 1183).
And properly implemented X/Y Count control routing blitters, fixes anything that uses software Bresenham and/or polygon stuff.
Added the AT&T 2xc498 Precision RAMDAC.
Added 1MB configurations to the Cirrus Logic GD5434 as well as re-organized the memory size options of the other Cirrus cards.
Separated the et4000w32/i blitter from the standard et4000w32p blitter and properly implemented the X/Y Count route.
Added several Diamond Cirrus cards.
Added Number Nine S3 cards (868 and 968-based).
Fixed the WD90c30 1MB modes.
Re-organized the video card names.
Bit 1 is of 0x3DA (read only) is apparently required to make the OS/2 Tseng ET4000W32/i drivers work fine, fixes hangs upon reaching the GUI with said drivers.
Avoid division by zero in the blitter of the ET4000W32/i under OS/2.
Video changes (PVGA):
Fixes mode changes of the PVGA1a, including the built-in video card of the Amstrad 2086/3086.
Improved the banking of the ATI 28800-5 cards (VGA Charger and VGA Wonder XL).
Improved the skew and horizontal display of some of the ET4000W32P cards as well as the cursor.
Made the Oak OTI 077 and PVGA WD90c30 cards use the Sierra 11487 (actually a clone is used in the real cards).
For the WD90c30, changed the way the hack is involved.
Reverted some changes of the S3 Vision/Trio that originally made glitches, now the glitches are gone and the accelerator renders fine.
Re-organized the Sierra 1148x RAMDAC's and added the 11486 (Mark 1).
MCA SVGA cards use the full 32-bit mapping.
Fixed ET4000/W32 (without letters) hardware cursor.
Fixed non-interlaced 1280x1024x8bpp Cirrus mode in the 5434.
Added a note regarding the Radius (HT209) 8bpp render.
Reworked the TGUI9440, but still WIP.
Fixed freezes, once and for all, on win2000 (W32p).
Fixed some graphical glitches under win3.x that were caused by the FIFO (W32p).
Fixed vlb flag, now it loads the VLB rom properly (W32i).
Anything using the ICS ramdacs now has a svga->clock /= 2 in recalctimings (W32p rev c and W32/W32i).
Fixed (at least in a more correct way) software cursor under OS/2 Warp with the s3 trio/vision drivers.
Implemented 128x128 sprite/hwcursor on the et4000w32 cards per manual.
