Reads and writes mostly do nothing but log, although the status returns a dummy value of 0x04 (no command in flight, not waiting for anything, and no errors).
1. Properly implemented polygon filling in the BitBLT side of the ATI 8514/A compatibles (Mach8/32), this allows games like Mj8514 and demos like HDIDEMO from IBM to run under ATI's hdiload 1.1 properly.
2. Finally figured out the polygon filling command in the IBM one about read and write masks (Command 5 and Command 2 with polygon filling bits on, currently only for the read mask one), this allows the above samples to render properly with IBM's original hdiload 1.0 from 1987.
1. The chip in question now supports the right command length for vendor unique commands, fixes crashes that use said commands.
2. Made the CD speed of said chip even closer to the real thing.
1. Changed the MCA ID of said adapter to one that is add-on based rather than integrated (still no bios though).
2. Fixed the DMA/IRQ stuff of the 86c01 DMA side of the card.
1. Made the 924 BIOS use the AT&T 491 ramdac since it supports such (tested).
2. Tweaks to the 928 Brooktree ID detection to make sure the cursor is shown correctly in 16bpp+ modes (it uses the BT485 ID detection so that it knows what BT is using to accommodate the cursor model).
3. Refactored the mode (CRTC50) and pitch timing stuff (moved to recalctimings for example) so that drivers/games/operating systems and what not can be used normally. (Warning, more stuff is to be tested due to a gazillion of combinations used by said stuff).
4. VRAM wraparound is now working as it should, fixes Commander Keen games.
5. Indentation fixes.
6. Attempt to fix 15/16bpp mode acceleration used by the 911/924 chips (not perfect and still has bugs).
7. Added the remaining missing stuff of the Sierra SC1502x RAMDAC including its 8BIT setting.
8. Some drivers use FIFO bits in non-FIFO configurations, should fix hang ups in some instances (namely the 928 S3 2.3 NT 3.1 drivers and possibly more).
9. Separated the 911/924 acceleration from the 80x/928+ one though the use of a function pointer.
10. Fixed the inverted colors in some instances using the S3 Trio64 driver in Win9x (mainly on soft reboots).
11. CX/CY (non-Blits) and DX/DY (Blits) wraparound correctly during their respective operations, fixes OS/2 software cursor once again while keeping existing stuff working.
12. Added some comments to keep track of some anomalies.
13. Fixed some badly formatted if's and switches.
14. Limited the SPEA Mercury Lite VRAM to 1MB per real world configurations.
