#include "msx.h"
//
// Version 0.0 alpha
//   Functionality implemented:
//     128k ram
//     128k videoram
//     nonvolatile ram
//     All MSX1 screens
//     All MSX2 screens
//     Most Sprite functionality except screen6&7
//     All VDP 9938 functions that can be emulated in VGA
//     Software scroll and pages
//   Not supported (yet):
//     vdp(24) reg 23: support in textmodes.
//     Alternating pages in high screen modes
//     Set adjust
//     Sound
//     Joystick
//     Mouse
//     Interrupt on line
//     Hardware scroll and pages using native VGA
//     Accessing PC-files from MSX
//     Proper keyboard support, now US MSX keyboard.
//   First updates needed:
//     Disk handling for copyprotected disks
//     Various performance enhancements
//     Unlimited memory: Protected mode
//     212 lines support using VGA registers
//
//
// Version 0.1 alpha
//   All Sprite functionality implemented except screen 6&7
//   Debug screen now contains command list.
//   Bug fixing:
//     - Palette handling errors fixed
//     - Blinking screen 0, when high intensity background
//
// Version 0.2 alpha
//   Debug screen now contains screen mode
//   Some performance improvements
//   Bug fixing:
//     - Screen 5 & 8 Spriteplane was not used		      (Columns)
//     - Screen 5 - 8 Sprites incorrect on other screen pages (Columns)
//     - Error accessing videomem with hmmm(unsigned offset)  (Columns)
//     - Error in hmmm screen 6&7, high order bit of x ignored(Tetris,Trojka)
//     - Screen/Sprites refreshed even when interrupt disabled(Boogy Woogy jungle)
//     - VDP cmds, if ny=0 then ny=max and not 256 as assumed (YS1)
//     - ymmm incorrectly implemented			      (Fray,Xak II demo)
//     - screen 5 used spriteplane incorrectly		      (ZOO, Testament)
//     - lmcm started return of bytes one byte too early      (ZOO pic->sprites)
//     - Z80 error res 0,a				      (Hydelide I)
//     - mem access check changed in msx1 scrs (gave Garbage) (Radarsoft logos, Tasword)
//
// Version 0.3 alpha
//   Diskio updated
//	 Now able to use any diskrom
//	 Faster diskio
//	 Copyprotected disks (not using hard i/o on diskrom) can be handled
//   hmmc performance improved (loading of vram from cpu)
//   Some sprite performance improvement
//   Debugmode changed, preparation for own VGA handling (212 lines)
//   Bug fixing
//     - hmmv now correctly handles the color byte	      (XAK I)
//     - Support for DD11nnnn instruction		      (Vectron)
//     - Various "Error writing videomem" (ny=0)	      (Milnas)
//     - Error in dd84,dd85,fd84,fd85 (undoc instr.)	      (Milnas,Road of Darkness)
//     - Error in pallette handling screen 8		      (Backdrop color)
//
// Version 0.4 alpha
//   Minor changes to debugmode
//     - Message added at bottom of screen for videoram errors
//     - (Esc & q, instead of x & h)			      (Edwin Weijdema)
//     - Action z added to zero rom signature & reset	      (Edwin Weijdema)
//   212 lines support in screen 5,6,7,8
//   Rom names changed to names used in saveroms.bas
//   Mousesupport (Port 1) added			      (Frank Druijff)
//   MSXSVE.DMP file format changed
//     - 8 bytes signature "MSX2AvD1"
//     - z80 registers (af,bc,de,hl,ix,iy,pc,sp,af',bc',de',hl',imask,imode)
//     - 47 video registers (0-46)
//     - 10 video status registers (0-9)
//     - 16 pallette red registers
//     - 16 pallette green registers
//     - 16 pallette blue registers
//     - 128k videoram
//     - 4 slot select bytes
//     - 4 subslot select register bytes
//     - 4 mapper bytes
//     - nr of 16 k blocks in memory
//     - n blocks of 16k bytes of memory
//   slot handling simplified (preparation for protected mode)
//
//   Bug fixing
//     - Minor bug in debugger, ED &DD instructions were displayed wrong.
//     - Transmit ready is not set when Command executing = 0 (Saziri)
//     - VDP reg 14 was not masked off causing video read and write errors
//     - Transparancy bit in vr[8] now handled correctly      (Saziri)
//     - VGA overscan now loaded instead of leaving it at color 0
//     - VGA Screensize set to 192 or 212, hardwarewise       (saziri)
//     - IN r,(C) negative condition code was not set	      (Golvellius
//     - RRD condition code was set incorrectly 		  +
//     - RLD condition code was not set at all			MSXFAN)
//     - Support for CB30-CB37 instructions		      (Day 2)
//     - Support for DDC3nnnn				      (Day 2)
//     - Horizontal retrace of VGA now reflected in REG[2]    (Fantasm soldier)
//     - Ptrs for Nametable, Patterntable & Colortable
//	 overflowed when > 32767			      (Xanadu)
//     - Error writing video ram in hmmm, page was not signed (Bubble/Bobble)
//     - Support for DD3Annnn, DDE6nn			      (Bubble/Bobble)
//     - vr[23] now also supported for sprites		      (1942,Firebird,Laydock)
//     - Not& Tnot in logical video operations now correct    (DP)
//     - 25 line support implemented in TEXT80 mode	      (Ted)
//
//
// Version 0.5 alpha
//   Setvideomode & Clearscreen C-routines replaced by "own" routines
//     in preparation of protected mode (also saves 30k memory).
//   Debugmode output & input changed in preparation of protected mode
//     also layout for future functionality
//   Disassembler added in debugmode
//   Protected mode, 256K and more memory (now set to 1M)
//   Some sprite performance improvement
//   Some z80 performance improvement was 180 is now 215-225
//   Bug fixing
//     - Return values set in srch command even if no BD      (MSX Designer)
//     - Debugmode displayed DDxxnn instructions wrong
//     - vdp x and y masked now according to videomode
//	 there were still incorrect videomemory addressings   (Super rambo)
//     - Sprite drawing disabled in screen6&7 until supported
//	 caused screen corruption			      (Gandhara)
//
// Version 0.6 alpha
//   Bug fixes
//     - Spriteline 211 was not drawn			      (Tower of gazzle demo)
//     - Crash, when sprite moved in screen from the right    (Athletic land)
//     - Initializing of FLOPPY.DSK incorrect
//     - Initializing of FLOPPY.DSK in msxprot.exe not done
//     - Write to existing FLOPPY.DSK gave access denied in msxprot
//     - Video was not refreshed properly when reg[9] was updated
//	 causing incorrect bottom part of screen in all modes
//     - bug in Z80, interrupts were missed		      (Timing, Starquake)
//     - autoincrement of vdp reg 14 corrected
//   Comment
//     - Ramdisk Paul te Bokkel V2.16 uses address 7fff for
//	 checking the amount of memory. When using this address
//	 in page 0 at 4000, this conficts with the slotregister-emulation
//	 After changing this addres to 7ffe, the ramdisk works properly.
//
//
//-----Production V1.1 for Tilburg 8-4-95-------------------------------------------
//
// Version 2.0 alpha
//   Video Memory write performance improved (10-15%)
//   Sprite drawing performance improved (25-30%)
//   Memory & Videomemory initialized to zero, when MSX4PC is started
//   Harddisk can now be set to a: and floppy to b:
//   Sprite refresh algorithm changed for blinking
//   Sprite redrawing algorithm changed
//     sprites are now not redrawn if the same as previous
//   Sprite redrawing algorithm changed when attrtable is switched
//     sprites are not redrawn if not necessary
//   PSG emulated on ADLIB (no noice and envelope)
//
//   Bugs
//    - DEC C was incorrectly displayed as DEC D in debugger
//    - EDA7 now treated as NOP 			       (Eggerland2)
//
// Version 2.1 alpha
//   FLOPPY.DSK file now formatted if it doesn't exist;
//   Debugger now also accepts commands in help screen
//   Debugger command added to switch floppy disk
//   Debugger command added to switch mouseport
//
//   Bugs:
//    - Video_reg[2] high bit now masked		       (thexder)
//    - sprite overlap sometimes caused background to be drawn
//	  i.o. other sprite.				       (rollerball, penquin 1)
//    - DDCB instructions incorrect length in debugger
//    - RLD instruction modified high nibble of AF	       (Hero)
//    - Mouse support changed to more resemble hardware, for
//	people who do their own mouse support and don't do the
//	official 8 required read's                             (Compass)
//    - Number of video-registers extended to 64
//	as progam can set 64 registers (47 are used by msx2)   (Compass)
//    - videomem access algorithm changed to support programs
//	that say they are going to read and then start writing
//	to videomemory. Now mixed reading and writing is
//	supported as in an msx. 			       (ROM, Disk magazine)
//    - Support added for ED70 & ED71 instructions	       ( ""    "")
//
// Version 2.2 alpha
//   Printer now supported on lpt1,lpt2 or lpt3
//   Bugs
//    - Bug introduced with sound fixed, float not allowed in
//	my protected mode handler, so removed.
//    - Protected mode version now also runs under qemm dpmi
//	without windows, thus saving some cpu-power.
//
// Version 2.3 alpha
//   Sprites in Screen 6 & 7 now supported
//   MSX.INI configuration file support added
//   Unknown undocumented instructions can be made to be nop in MSX.INI
//   Simulated horizontal retrace interrupt (10 hor ints per 1 vert)
//   Bugs
//    - Sram register was only 2*13 long, sometimes causing crash
//	especially when pos 28 was 0
//
// Version 2.4 alpha
//   Bugs
//    - Register a now cleared after diskio, when io succesfull (BK problem)
//    - Dir_floppy and Name_floppy now also saved when changed online
//
// Production version 2.4 Zandvoort 23-9-95
//--------------------------------------------------------------------------
//
// Version 3.0
//   When switching floppy disk the filesize is checked to be 737280
//	thus making sure we cannot corrupt another file.
//   Video reg 23 implemented via VGA hardware registers, hardware VGA scroll
//
//   Bugs
//    - After use of Sprites in screen6, all videomemwrites caused  (EASE etc.)
//	incorrect screen output (blocky screen)
//	VGA register was not reset properly
//    - Screen refresh in screen6 did not set all VGA registers, sometimes
//	causing a corrupted screen				    (EASE)
//    - Sprites in screen 6 corrected for hardware tiling function
//	this simulates a finer sprite resolution
//    - Palette 0 not handled properly in Screen 6, value not masked(HIBRID)
//    - EDF1 now seen as nop					    (KONAMI SOCCER)
//    - Pattern & ColorTable in graf2&3 now also handle the mask bits
//	to visibly repeat the screen and reuse the pattern & colortable (Dr Archie)
//
//--------------------------------------------------------------------------
//
// Version 3.1
//   Optional Set adjust implemented through vga registers
//    0 no support
//    1 Full vertical support, but only each 4 for horizontal
//    2 Full vertical + horizontal, but because of vga (in)capability
//	this mode can give distortions on the screen.
//   End of command content of video_reg[32] upto video_reg[46] implemented
//   Due to Harware VGA scroll further performance improvements were
//    possible in videomem writes in screen 5 & 7
//   Performance improvements in all videocommands having a logical operand
//    Copy, Line, Box etc (+/- 30%).
//   Sound switched off at quit. The emulator sometimes left a highpitched
//    note on at exit.
//
//--------------------------------------------------------------------------
//
// Version 3.2
//
//   Bugs
//    - When loading roms and there was no memory then no check was
//	was done, crashing the machine
//
//--------------------------------------------------------------------------
//
// Version 3.3
// Production version Version 3.3 for Tilburg 30-03-96
//   MSX-Music support added
//
//--------------------------------------------------------------------------
//
// Version 4.0
// Version for MCCM CD-Rom
//     - Cleanup of some of the coding, removing some debugging and old code
//     - MSX_CONF changed to check if writing of INI file is allowed
//	 else emulator can crash machine if run from a CD-Rom
//     - Support for readonly floppy files for CD-Rom support
//     - Readonly sram.ram file now supported
//     - Startup with command line parameter sets first arg as A:
//     - 360k Images supported
//     - VGA Cursor now set to MSX position
//     - added possibility to disable MSX font loading, so VGA character
//	 set can be used for those cards that are a little bit different
//	 like the Tseng ET6000
//     - Drums in Opl-3 mode correctly implemented by switching left and
//	 right channel for psg and fmpac, was left psg and now right psg
//	  ALLTHOUGH ON MY CURRENT MACHINE EVERYTHING GOES TO THE
//	  RIGHT CHANNEL, BUT ANYWAY WE NOW HAVE ALL SOUNDS
//     - Wait loop introduced in z80 emulator so speed can be set
//
// Version x.x
//     - Videomemory is accessed differently in screen 7&8     (Breaker)
//
//
// Not supported:
//   PSYCHO WORLD: (switches between screen5 & 6 & uses line interrupt

void main(int argv, char * argc[])
{
union _REGS inregs,outregs;

    if(argv > 1) {strncpy(flopname,argc[1],sizeof(flopname));FloppyParm=1;}

    fm_init();

#ifdef protected
    goprot();
#endif

    read_conf();


    sprite_init();
    if (!mem_init()
     || !video_init())
    {
	printf("Problems allocating memory!");
	exit(0);
    }
    read_roms();
    keyb_init();
    Disk_init();
    loadsram();
    z80_reset();
    io_init();
    snd_reset();
    snd_init();
    for(;;)
    {
	z80_exec();
	msx_dbug();
	if(halt && !imask) break;
    }
    savesram();
    save_conf();
    sprite_exit();
    video_exit();
    keyb_exit();
    Disk_exit();
    io_exit();
    snd_off();
    inregs.x.ax=_TEXTC80; _int86(0x10,&inregs,&outregs);
    exit(0);
}