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.
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.
Ported the latest changes/fixes to the above controller from QEMU and added a bios-less AMD Am53c974 device (non-DC390).
The latest changes fix the AMD-branded DOS ASPI drivers on both cards (even without bios).
* plat_vidapi() accepts char pointer, which never gets modifed
later on. Mark it as const.
* In src/config.c, va_name is initialized as NULL, however,
plat_vidapi_name() never returns a NULL pointer, nor it was
initialized under a condition branch. Removing NULL, might
save one instruction, which requires zeroing the register
before setting its initial value.
