1. Correct the clock chip of the S3 928 (Metheus Premier 928) to use a ics2494 one (a board picture shows the CH9294, a clone of the ics2494/av9194).
2. Correct the 8bpp and high color refresh rates of the Metheus Premier 928 when either bt48x x2 clock multiplier is enabled or when hitting high color.
1. If the VGA mapping is for a 0xA0000 map for a length of 0x10000, then disable XGA mode (this is independent of the XGA extended mode aperture mode 1 which is XGA's own 0xA0000 mapping).
2. Remove text mode ctrl-alt-del hack.
3. Fixed cursor x coordinate in the Trio32 using 15bpp/16bpp modes.
1. Pixtrans on port 0xb2e8 is not available on 864/964 and up (including the trio64) due to color compare taking its place, fixes some graphical glitches in WinXP.
2. The DOS s3id utility identifies the 80x chips correctly, either it's 801 ISA or 805 VLB, but not 805 ISA even if they share the same id, but since it's an ISA card, identify the Elsa Winner 1000 805 ISA as a 801 card.
1. Actually mostly workarounds to make it render normally without a hitch (I hope) using the Diamond Stealth VRAM 911-based 15bpp driver.
2. Updated logs.
1. See above, as best as possible, but manuals would be helpful.
2. Reverted the ramdac of the 924 to the sierra one because of a bug that triggers 24bpp mode when it shouldn't.
SVGA related:
If CRTC1/HDISP is odd (if bit 0 is set), then make it even accordingly, else leave it as is. Should fix some display skews.
S3 related:
Remove old code references (can still be accessed through history if one needs it).
8514/A compatible related:
Proper use of the htotal and hdisp timings.
S3:
1. Cleaned up the Short Stroke command processing.
2. Proceed calculating the error term only when it's equal or greater than the line length (Draw Line, Command 1 and also applies to Short Strokes, Command 0).
8514/A compatibles:
1. Reworked the polygon draw type A processing.
2. As with the S3, reworked the way error term is handled in the processing, and on Command 5 (Draw Polygon Boundary Line).
1. Initialize Multifunction indexes 0x0D and 0x0E properly, should fix inverted colors on S3 OS/2 Warp drivers.
2. Make the remaining Vision868/968 only ports handle the 32-bit toggling properly.
3. Cleanups
Cirrus 5436/46 and 5480.
Finally fixed the Solaris 2.6 font issue, was a dword swap one with color expansion.
S3.
1. Make 868/968 ignore horizontal skew, ergo horizontal override until a proper solution is found regarding hardware tests.
2. Fixed a minor mix issue with S3 911/924 Win3.1 drivers in 8bpp mode.
1. Simplified 4bpp rendering mode.
2. Implement CRTC31 bit 0 functionality which enables/disables the vendor banks. Fixes Diamond Stealth 64 964 VRAM (VLB/PCI) detection on NT 3.1 (and possibly other cards) while keeping NT 3.1 347.1's full screen Command Prompt test normal without garbage using the 911/924 chips.
8514/A/Mach8/32:
Reworked the acceleration a bit as well as the mode switches from VGA to ATI/8514/A mode and viceversa based on the documentation. Fixes the Linux GUI fonts using the Mach32 driver (possibly Mach8 too) and other anomalies (still needs more work on the acceleration though).
PVGA:
Minor fixes to the banking.
S3-based (Pre-ViRGE):
1. Made the chip class use its own banking so that the Enhanced Mode mapping (equivalent to 64K-based A0000) is taken into account (per bit 3 of CRTC31, which forces the mapping to be 64K A0000, regardless of the GDCREG6 bits). Fixes NT 3.1 347.1's S3 driver.
2. Initial rework on 15bpp/16bpp accelerated mode of the 911/924 chips (currently not 100% bug free, I need help with this chips).
XGA-1/2:
Get rid of the linear endian reverse variable hack used by OS/2 and, instead, use the already declared ones more wisely, fixes OS/2 2.1 reversed fonts and keeps everything else working as it should.
Misc:
Added the BT481 RAMDAC for future card use.
1. Actually fix the remaining pinkish/reddish stuff in 32bpp modes properly (for real, especially OS/2 and possibly other stuff).
2. The Compare accel stuff is more sanitized.
3. When the BitBLT DY coordinates are negative, don't draw the pixels. This fixes some software cursor issues with OS/2's S3 3.03.xx drivers.
4. Reset the FIFO when the card is reset.
5. Indentation fixes (to be improved further however).
6. Implement bit 5 functionality of 0xBEE8 index 0xE (MULT_MISC) (and currently only in the Rectangle Fill command). This fixes missing text on I-O Data Vision968 specific drivers for Windows 3.10 Japanese (PC/AT compatible)
7. Moved the Streams engine out of the FIFO (like the ViRGE) as well as making all CRTC's of the Trio64V2 writable and SEQREGs from 0x10 onwards to make sure the Streams engine works properly.
8. Added a missing break from the RAMDAC read stuff.
9. Remove a leftover of PCem.
1. TVP3026: disable lut mapping on 24bpp modes (mainly the S3 Vision968 drivers which use the TVP3026 ramdac).
2. S3 Vision968 (MiroVideo 40SV Ergo): Corrected 1280x1024 24bpp resolution.
3. ViRGE class: limit the FIFO entries in the bitblt regs to less than 16 entries and make the Image Transfers FIFO writes wraparound to 1 and reads to 0 (to allow at least a read to a write in the thread without hanging the entire emulator). Fixes Win3.1 PBRUSH colors while keeping performance on par with PCem.
SVGA: Added an indicator of the internal line to make matters easier for some vertical resolution problems.
TGUI 9400CXi: Fixed the basic acceleration as much as I could.
TGUI 9440AGi+: As with the line indicator, make matters easier for some resolution problems plus some refactoring of the bpp. Added write protection to some regs based on some documentation on the vt8601.
TGUI cursor: fixed the left edge of the cursor X offset.
S3: Apply the vblankstart = dispend statement only on enhanced modes, fixes vertical display on The Incredible Machine for DOS.
Commented out some excess logs.
1. Ported the S3 ViRGE reset fix to the Pre-ViRGE cards.
2. Slight cleanup on the acceleration and logs.
3. Unused sequencer register data now return 0xff instead of 0. This fixes Scorched Earth 1.x on DOS using S3 Trio32/64/V+/V2/868/968 cards (on other S3 it works fine as is).
1. Added the Diamond Stealth 64 Video VRAM 968-based card.
2. Removed the useless VLB-based Phoenix 868 and 968 cards.
3. The Diamond Stealth 64 Video VRAM specific drivers apparently use 0x83ca-0x83cb as aliases of the RAMDAC ports 0x83c6-0x83c7 (New MMIO mode). This makes the hardware cursor visible in those drivers on win3.1 using the IBM RGB RAMDAC.
4. A few more logs and sanity checks around LFB access and MMIO as well.
S3 928:
When the pitch is 1280, make sure the proper horizontal resolution is displayed right (in this case, 1280x1024).
S3 Vision864:
Exclude it from the horizontal blank bits due to more issues that are TBD (like the Trio32 and 64 and up), this works around the mode issues under Windows 9x and more as well as fix 32bpp horizontal rendering in said chip.
1. The SPEA specific cards using the 801/5 chip apparently have an ID that's not 0xa0, rather, they either use 0xa2 or greater for the stepping. Fixes wrong colors in 800x600 modes and greater in 8bpp mode.
2. HWCursor addresses for 8bpp are now properly implemented if the 8bpp mode bit (CRTC3a bit 4) is checked, no longer relaying on GDCREG5 bit 6). Fixes garbage cursor in the SPEA 80x cards drivers (BigWin) using 8bpp mode.
