Moved the BT48x hardware cursor draw function to the RAMDAC's code where it belongs;
Renamed the BT48x RAMDAC code file to vid_bt48x_ramdac.c (was vid_bt485_ramdac.c);
Fixed BT48x 64x64 hardware cursor bugs (caused by the index variable being uint8_t when it should have been uint16_t) introduced in the previous commit.
Changed the 964-based Stealth64 BIOS to use the 1.07h BIOS and report an ID of D0 instead of D1, because the D1 revision appears to have changes that are not documented anywhere.
Removed the ExpertColor S3 Vision868 card;
Rewritten the ICD2061 clock chip and moved the Diamond Stealth 32 back to the main branch as it's now fixed;
Fixed the Y offset of the 64x64 hardware cursor of the Cirrus Logic cards.
Bunch of improvements in the device, memory and MMU handling.
Re-worked the NEAT 286 chipset (ported from VARCem).
Re-worked the ATI 28800 a bit, added Sierra SC1502x ramdac to VGA Wonder XL (Compaq) since it supports such.
Top 384K memory handling improvements (256K top memory too)
Added MCA version of MPU-401 (not tested much, however).
Re-worked the SCAT 286 chipset.
Fixed the segment address handling on both Tseng cards and also implemented register key protection for both - the real fix for the TSX scrolling problem (it appears TSX spuriously writes to port 3CD, probably to probe something, and that was messing up the banking segments).
The read and write bank addresses now follow the 256k wraparound - fixes scrolling in TSX on both the ET4000AX and the ET4000/W32p (needs further testing to make sure nothing is messed up by this).
A small change to how the video font array resetting is done, to correctly allow for internal Korean graphics cards, fixes the emulator segfaulting in some cases with the Trigem 286M and the internal Korean ET4000AX.
Several bug fixes;
Preliminar addition of the SDL 2 renderer (does not yet work correctly in full screen mode);
SCSI devices no longer have configurable LUN's (this matches the configurability of real SCSI devices);
SCSI LUN's are now handed by the device's handler;
Removed all unused strings;
Removed some unused code files;
Significantly rewrote the bus mouse emulation.
Fixes to various hard disk controllers;
Added the Packard Bell PB640;
Fixed the InPort mouse emulation - now it works correctly on Windows NT 3.1;
Removed the status window and the associated variables;
Completely removed the Green B 486 machine;
Fixed the MDSI Genius;
Fixed the single-sided 5.25" floppy drive;
Ported a CPU-related commit from VARCem.
