1. ATI Extended 8514/A mode may not use bit 5 of ATI reg 0xb0 sometimes but at the same time it won't use the standard VGA way of setting up 256+ colors, therefore, in the VGA DAC writes, use standard VGA way to revert to VGA mode in the writes instead of relying on bit 5 of ATI reg 0xb0 being enabled/disabled there. Fixes mode switches in VLB/PCI configurations using Windows 9x and possibly other stuff, ISA is unaffected and still works fine.
2. Added more logs and and remove/set I/O handlers correctly for the PCI side.
Mark the ATI extended 8514/A mode accordingly (that is, if bit 5 of ATI reg 0xb0 and using ATI extended ports at the same time). Fixes wrong colors in some instances using standard IBM 8514/A drivers on Mach32.
1. Added the missing call to mach32_updatemapping from port 0x3CF through its index 6.
2. If the accelerator DAC is active and the extended 256 color bit is on too then enable 8514/A mode when needed, otherwise it's VGA mode or decided by the passthrough/clock selection ports.
3. VGA DAC reads are redirected to the 8514/A DAC reads only when 8514/A mode is on.
1. vga_on global variable removed, as it didn't play well with 2 subsystems at once (8514/A and XGA both enabled).
2. Emulate the Foreground/Background Color aliases of PIX_TRANS properly when not executing a command.
3. Voodoo 3D override now works properly (again) with Mach32 PCI cards and others by turning the 8514/A timer off and on accordingly.
8514/A compatibles:
1. The mode switch (from VGA to 8514/A/ATI and vice-versa) has been fixed again (for the Nth time).
2. Removed a pattern hack used on DPCONFIG = 0x5211 on bitblt, now patterns work properly using the ATI Mach8 3.0 win3.1x drivers.
3. Clipping regs are more accurate for acceleration.
XGA 1-2:
A picky OS is a picky OS, fixes to the Win95 fonts (which uses the pattern sources) applied.
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.
8514/A changes:
1. Correct interlaced display resolution.
2. Added a limit to cursor coordinates.
3. Test/WIP features of the add-on Mach8 side (ATI 8514/A Ultra) such as configurable BIOS.
4. Made the CMD 5 of the acceleration (Polygon Boundary) more accurate per manual (as much as I could regarding the clipping).
Cirrus related:
1. Added SUBSYS PCI vendor/device ID of the 5480 (per manual).
IBM VGA:
1. Built-in/option rom-less VGA don't need the "available" flag.
ATI Mach8/32:
1. As with 8514/A, corrected interlaced display.
XGA-1/-2:
1. Moved the XGA R/W memory size tests out of the SVGA R/W routines to reflect the per card basis, although anything that uses its own SVGA mapping would call the tests there (such as Cirrus, Headland and ATI) when not accessing the LFB. This finally puts an end to the XGA MCA mapping enabling bugs.
2. Re-organized the ISA standalone and non-standalone (INMOS) sides of the chips so that they work properly and remove the FILE rom loading hack from init.
3. The Memory Mapped R/W sides now account for instance in their address range.
4. INMOS only: prevent any ROM address access to anything lower than 0xc8000 to not conflict with the main BIOS rom loading.
5. Fixed native pitch by using the correct register, this fixes non 1024x768 resolutions under NT.
6. More logs when enabled to see any future bugs.
1. Going from screenshots of the Mach32 chips, they all have the ati18811-1 clock regardless of the bus type, whilst the Mach8 has an ati18812, which is actually a ati18811-0
2. Unbreak the NS3.1 Mach32 driver, ergo, don't block the LFB processing.
IBM 8514/A set:
Fixed a one off video bug that was causing the VGA video to not be restored after quitting a 8514/A GUI session (namely on Win2.x' 8514/A's driver).
ATI Mach32:
Fixed another vertical display issue when activated (in 1280x1024 mode, when 1024 was 1022).
All involved:
Apply RG's changedvram fix to 8514/A, Mach8/32 and XGA's changedvram pointers.
1. Corrected the ATI 1881x clocks for use with the ATI Mach8/32 and VGA Wonder chips. The CPU slowdowns should now be gone.
2. Merged I/O ports common to both the ATI and IBM 8514/A compatible chips where they have identical code (extended behavior is still separate). Code duplication is now less than before.
3. Fixed a general polygon pattern issue in the Mach8/32 affecting calc.exe in Win3.x and other stuff.
4. Mode changes are, once again, changed (ATI and IBM), as close as possible to the real thing without destroying existing resolutions.
5. The 8514/A Vertical Counter has been extended to 0xfff so that it can take 1280x1024 resolutions well offered by the Mach32 as well as a better way to change the IBM/ATI modes through a callback swap where approprietate.
6. in 8514/A mode, reads from the 0x3c6-0x3c9 ramdac range is redirected to the 8514/A RAMDAC (0x2ea-0x2ed).
7. LFB access in the Mach32 now no longer takes account of the SVGA derived rops. Fixes Mach32 display on NeXTSTEP/OPENSTEP 3.x/4.x
8. Reworked the Display Sense Status and Subsystem Status ports so that they're not copycats from MAME and instead follow the datasheet.
1. On both Mach'es: direct linear video memory access is now the default for LFB mapping: fixes Mach64 drivers on NeXTSTEP/OPENSTEP and keeps everything else intact.
2. Mach8/32: minor cleanup to mode change code.
Make sure for the 9001st time to display correctly the horizontal side of the display (looking at you, ATI 1992 set for win3.1x and Mach8/32 drivers for OS/2 1.2x).
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.
1. Second attempt to fix the banking in the Cirrus (sigh, why doesn't banking get nulled automatically...)
2. Introduce a new timer to the 8514/A side so it won't slow the VGA clock down it was shared before.
1. Cleanups and moving the mach8/32 struct to a dedicated header so that would allow for future 8514/A add-on clones (in paper).
2. Mach8/32's port 0x4ae8/9 and shadow set ports (0x5aee and 0x46ee) now account to the mode changes seriously, should fix most of the horizontal/vertical coordinates while entering GUI modes of various stuff.
3. Horizontal/Vertical window coordinates can only be modified if the display enable bit of port 0x22e8 is set as well as bit 0 of port 0x4aee, fixes most problems noted above.
4. Implemented horizontal blanking stuff a la VGA but actually for 8514/A and clones (like ATI).
5. Added some comments regarding the current situation.
6. The Mach8 was actually a 8514/A clone co-processor, not a single solution card of its own. The ATI Graphics Ultra was a single solution card that is actually a Mach8 + ATI 28800-6 in one, so renaming it accordingly.
7. Fixed garbled/distorted acceleration when device bitmap acceleration is enabled in the ATI Mach8 3.0 Win3.1 drivers.
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. Apparently some stuff uses read-only port 0x86ee and expects it to return 0 while port 0xf6ee is an alias to 0x82e8, this should fix hangs in Majong 8514 using ATI's DOS drivers.
2. 8514 data available bits are reset properly when new parameters for a new command are installed (port 0xCEEE), fixes remaining hangs with some stuff.
1. For some reason, background colors were always black under those drivers in 8bpp mode, added a tweak to fix it (as well as Clock colors).
2. Likewise for the red scrolling in pbrush or write, added a tweak to its bitblt read mask.
3. Don't call svga_recalctimings in the hdisp/vdisp ports directly, fixes screen size on said drivers without affecting other stuff.
1. Fixed wrong setting of highres and lowres mode of 8bpp, makes Transport Tycoon run properly on these ATI cards again.
2. 32-bit (RGBA) True Color is actually supported on the Mach32, but barely used, and the original code was wrong. This fix makes 32-bit True Color render the right colors.
1. Update svga->fast to account for packed chain mode toggles, fixes issues on Descent II for DOS using the Cirrus cards.
2. Re-organized ATI Mach8/32 LFB access as well as 8514/A/ATI mode toggles, should end the video mode issues once and for all.
3. Fixed a small but major pattern issue with IBM OS/2 1.30.1's XGA driver (not .2, which is fine as is).
1. Made the 8514/A mode switch to VGA and viceversa (including ATI mode) actually usable and eliminating the last bugs related to them. Fixes 8514/A mode in OS/2 1.x/2.x (both IBM and Microsoft).
2. More sanity checks to the 8514/A and XGA pointers. Should fix emulator crashes on hard resets.
ATI Mach64 is temporarily unthreaded because of blitter desyncing.
ATI Mach32 now returns to ATI mode from IBM mode and vice versa more correctly.
Make the IBM 8514/A compatible poll not run if a 3D add-on card (Voodoo1/2) takes precedence (seen on a Mach32 PCI and Voodoo2 3D combo).
Finally ended the mess ups of the TGUI9440/96x0 pitch, it actually was the CRTC offset reg (SVGA CRTC 0x13) that defined it with some shifting based on the BPP.
1. Cirrus Logic GD54xx, Paradise/WD VGA now reset the interlace once a text mode is issued if not done automatically.
2. Paradise/WD's 15/16bpp modes using the 800x600 resolution now have the correct ma_latch, should fix most operating systems drivers using this combo.
3. More fixes (hopefully) to the accelerated pitch and rowoffset of the Trident TGUI cards (9440AGi and 96x0XGi), should fix issues with delayed displays mode changes under various operating systems (e.g.: Win3.1x).
4. Preliminary implementation of the Area Fill command of XGA, which is issued while using various painting and/or calc utilities on Win3.1x (IBM XGA updated drivers, e.g.: 2.12).
5. Preliminary (and incomplete) 4bpp XGA mode.
6. The XGA memory test for the 0xa5 using writes (used by various operating systems) no longer conflicts with DOS' XGAKIT's memory detection.
7. Small ROP fixes to both XGA and 8514/A.
8. Re-organized the mapping of the Mach32 chipset, especially when to enable the ATI mode or switching back to IBM mode, should fix LFB conflicts with various operating systems.
9. According to The OS/2 Museum, the Adaptec AHA-154xB series of SCSI cards fail the ASPI4DOS.SYS 3.36 signature check, so now make the changes accordingly.
10. Remove useless and crashy bios-less option of the Trantor T128.
11. The Image Manager 1024 card can also be used on a XT (although only if it has a V20/V30).
12. Re-organized the IBM PS/2 model 60 initialization as well as its right POS machine ID (though an update to sc.exe is still required for the POST memory amount to work normally).
1. Hopefully fixed the passthrough stuff for good and fixed typo's in the IBM 8514/A poll function about the cursor.
2. Eliminated the ibm8514_on global variable in favor of a struct variable to be consistent with XGA.
