IBM.H is gone, video stuff re-organized. Keyboard stuff reorganized.
Machines that have their own video, mouse and/or keyboard now have all this in their machine file.
Fixed and other cleanups here and there.
The IBM PS/2 Model 486 now uses its own rom set ID;
The AHA-154x and Buslogic SCSI controllers no longer stop scanning for mailboxes when in aggressive round robin mode;
PIC interrupt processing fixes - no more IRQ-caused triple faults in Windows 98 SE.
The AT keyboard "write to mouse" command now returns 0xFF (error) when no PS/2 mouse is attached - fixes hangs on AOpen AP53, ASUS P/I-P55T2S, and Tyan Titan Pro/ATX when not using PS/2 mouse;
Fixed the emulation of the SMC FDC37C669 Super I/O chip - serial ports now work correctly on the AOpen AP53 and the ASUS P/I-P55T2S.
Thoroughly clean up the code to vastly reduce the number of compiler warnings and found and fixed several bugs in the process;
Applied all mainline PCem commits;
Added SCSI hard disk emulation;
Commented out all unfinished machines and graphics cards;
Added the AOpen AP53 and ASUS P/I-P55T2 machines as well as another Tyan 440FX machine, all three with AMI WinBIOS (patch from TheCollector1995);
Added the Diamond Stealth 3D 3000 (S3 ViRGE/VX) graphics card (patch from TheCollector1995);
Added the PS/2 XT IDE (AccuLogic) HDD Controller (patch from TheCollector1995);
Added Microsoft/Logitech Bus Mouse emulation (patch from waltje);
Overhauled the makefiles (patch from waltje);
Added the Adaptec AHA-1542CF SCSI controller (patch from waltje);
Added preliminary (but still unfinished) Adaptec AHA-154x SCSI controller BIOS support (patch from waltje);
Added an ISABugger debugging device (patch from waltje);
Added sanity checks to the Direct3D code.
SCSI controller is now reset on x86 soft reset, fixes DOS driver hangs after soft reset;
SCSI controller reset control is now implemented more accurately, on a 50 ms timer;
For the PS/1 Model 2011, the Keyboard Input Port bit 6 now correctly reports if the currently selected (in FDC DOR) floppy drive is 3.5" or 5.25";
Commented out excess DMA logging;
Added support for FDF floppy images;
Fixed handling of CDB allocated length field for the CD-ROM INQUIRY command;
(S)VGA port 03C1 write is back again (it was incorrectly gone in some builds);
Commented out Compaq/Paradise VGA;
PS/1 Model 2121+ISA now correctly allows selecting graphics card.
Fixed DMA emulation, fixes Olivetti M24;
(S)VGA emulation for PS/1 and PS/2 machines now uses the old, less accurate sense switches, fixes display error on POST;
Bit 2 of the AT keyboard input port is now always held active, fixes PS/2 mouse on PS/1 and PS/2 machines;
Fixed mouse type selection on non-AT boards;
Fixed RAM type selection;
The entire palette is now overwritten when a monochrome monitor type is selected, fixes graphics mode on Hercules;
Applied updated SCAT emulation patch from PCem forum;
Nvidia Riva and S3 Virge IRQ is now configurable;
Properly applied the mainline PCem commit that fixed the Bahamas64 on the Intel AMI BIOS boards;
Commented out the Diamond Stealth 64 and the Miro Crystal S3 Vision 964 due to their non-working state;
Changed version to 1.06.
The port 92 handler in mem.c now flushes MMU cache when toggling the A20 gate;
Added ability to reload previous disc after ejecting it;
Fixed the START/STOP UNIT command for both SCSI and ATAPI;
Applied mainline PCem commit: All XT models can now use 64kb RAM. Patch from ecksemmess .
Added experimental NVidia Riva TNT2 emulation (patch from MoochMcGee);
ASUS P/I-P54TP4XE, ASUS P/I-P55T2P4, and ASUS P/I-P55TVP4 are back;
National Semiconductor PC87306 Super I/O chip now correctly reenables devices after a chip power cycle;
Several FDC improvements and the behavior is now a bit closer to real hardware (based on actual tests);
Added MR Intel Advanced/ATX with Microid Research BIOS with support for 4 floppy drives and up to 4 IDE controllers;
Added floppy drives 3 and 4, bringing the maximum to 4;
You can now connect hard disks to the tertiary IDE controller;
Correct undocumented behavior of the LEA instruction with register is back on 286 and later CPU's;
Pentium-rea models with Intel chipsets now have port 92 (with alternate reset and alternate A20 toggle);
Overhauled DMA channel read and write routines and fixed cascading;
Improved IMG detection of a bad BPB (or complete lack of a BPB);
Added preliminary emulation of PS/2 1.44 MB and PC-98 1.25 MB 3-mode drives (both have an inverted DENSEL pin);
Removed the incorrect Amstrad mouse patch from TheCollector1995;
Fixed ATAPI CD-ROM disk change detection;
Windows IOCTL CD-ROM handler now tries to use direct SCSI passthrough for more things, including obtaining CD-ROM capacity;
The Diamond Stealth32 (ET4000/W32p) now also works correctly on the two Award SiS 496/497 boxes;
The (S)VGA handler now converts 6-bit RAMDAC RGB channels to standard 8-bit RGB using a lookup table generated at emulator start, calculated using the correct intensity conversion method and treating intensity 64 as equivalent to 63;
Moved a few options from the Configuration dialog box to the menu;
SIO, PIIX, and PIIX3 now have the reset control register on port CF9 as they should;
Several bugfixes.
SVGA emulation now has partial support for 12x24 text mode used by 48k HECON.SYS;
LEA AX,DX now once again issues #UD on 286+ like it should;
FF /7 is now correctly an alias of FF /6 on 8080x;
Hard disk configuration dialog now uses Segoe UI 9pt font instead of MS Sans Serif 8pt;
Removed excess logging from serial mouse and x86seg.c;
Applied mainline PCem PIT MSW1 fix commit;
IMG-based floppy emulation now takes GAP4 and post-sector delays into account;
Comemnted out emulation of non-Overdrive Pentium II's.
Cleaned up floppy code a lot and reverted to single poller;
Fixed segment present bit and limit checking at read/write within segment;
The ASUS boards now have memregs too;
RTC code improved based on suggestion by Sarah Walker;
Fixed SVGA odd/even emulation and added chain odd/even support;
Removed non-existent CPU's.
