/*****************************************************************************/
/*                                                                           */
/*				   atari.h			       	     */
/*                                                                           */
/*		        Atari system specific definitions		     */
/*                                                                           */
/*                                                                           */
/*                                                                           */
/* (C) 2000-2006 Mark Keates <markk@dendrite.co.uk>                          */
/*               Freddy Offenga <taf_offenga@yahoo.com>                      */
/*               Christian Groessler <cpg@aladdin.de>                        */
/*                                                                           */
/*                                                                           */
/* This software is provided 'as-is', without any expressed or implied       */
/* warranty.  In no event will the authors be held liable for any damages    */
/* arising from the use of this software.                                    */
/*                                                                           */
/* Permission is granted to anyone to use this software for any purpose,     */
/* including commercial applications, and to alter it and redistribute it    */
/* freely, subject to the following restrictions:                            */
/*                                                                           */
/* 1. The origin of this software must not be misrepresented; you must not   */
/*    claim that you wrote the original software. If you use this software   */
/*    in a product, an acknowledgment in the product documentation would be  */
/*    appreciated but is not required.                                       */
/* 2. Altered source versions must be plainly marked as such, and must not   */
/*    be misrepresented as being the original software.                      */
/* 3. This notice may not be removed or altered from any source              */
/*    distribution.                                                          */
/*                                                                           */
/*****************************************************************************/



#ifndef _ATARI_H
#define _ATARI_H



/* Check for errors */
#if !defined(__ATARI__)
#  error This module may only be used when compiling for the Atari!
#endif



/* Character codes */
#define CH_DELCHR	0xFE   /* delete char under the cursor */
#define CH_ESC 	    	0x1B
#define CH_CURS_UP  	28
#define CH_CURS_DOWN 	29
#define CH_CURS_LEFT    30
#define CH_CURS_RIGHT   31

#define CH_TAB          0x7F   /* tabulator */
#define CH_EOL          0x9B   /* end-of-line marker */
#define CH_CLR          0x7D   /* clear screen */
#define CH_BEL          0xFD   /* bell */
#define CH_DEL          0x7E   /* back space (delete char to the left) */
#define CH_RUBOUT       0x7E   /* back space (old, deprecated) */
#define CH_DELLINE      0x9C   /* delete line */
#define CH_INSLINE      0x9D   /* insert line */

/* These are defined to be Atari + NumberKey */
#define CH_F1 	    	177
#define CH_F2 	    	178
#define CH_F3 	    	179
#define CH_F4 	    	180
#define CH_F5 	    	181
#define CH_F6 	    	182
#define CH_F7 	    	183
#define CH_F8 	    	184
#define CH_F9 	    	185
#define CH_F10 	    	176

#define CH_ULCORNER 	0x11
#define CH_URCORNER 	0x05
#define CH_LLCORNER 	0x1A
#define CH_LRCORNER 	0x03
#define CH_TTEE     	0x17
#define CH_BTEE     	0x18
#define CH_LTEE     	0x01
#define CH_RTEE     	0x04
#define CH_CROSS    	0x13
#define CH_HLINE        0x12
#define CH_VLINE        0x7C

/* color defines */

/* make GTIA color value */
#define _gtia_mkcolor(hue,lum) (((hue) << 4) | ((lum) << 1))

/* luminance values go from 0 (black) to 7 (white) */

/* hue values */
#define HUE_GREY        0
#define HUE_GOLD        1
#define HUE_GOLDORANGE  2
#define HUE_REDORANGE   3
#define HUE_ORANGE      4
#define HUE_MAGENTA     5
#define HUE_PURPLE      6
#define HUE_BLUE        7
#define HUE_BLUE2       8
#define HUE_CYAN        9
#define HUE_BLUEGREEN   10
#define HUE_BLUEGREEN2  11
#define HUE_GREEN       12
#define HUE_YELLOWGREEN 13
#define HUE_YELLOW      14
#define HUE_YELLOWRED   15

/* Color defines, similar to c64 colors (untested) */
/* Note that the conio color implementation is monochrome (bgcolor and textcolor are only placeholders) */
/* Use the defines with the setcolor() or _atari_xxxcolor() functions */
#define COLOR_BLACK  	       	_gtia_mkcolor(HUE_GREY,0)
#define COLOR_WHITE  	       	_gtia_mkcolor(HUE_GREY,7)
#define COLOR_RED    	       	_gtia_mkcolor(HUE_REDORANGE,1)
#define COLOR_CYAN      	_gtia_mkcolor(HUE_CYAN,3)
#define COLOR_VIOLET 	       	_gtia_mkcolor(HUE_PURPLE,4)
#define COLOR_GREEN  	        _gtia_mkcolor(HUE_GREEN,2)
#define COLOR_BLUE   	       	_gtia_mkcolor(HUE_BLUE,2)
#define COLOR_YELLOW 	       	_gtia_mkcolor(HUE_YELLOW,7)
#define COLOR_ORANGE 	       	_gtia_mkcolor(HUE_ORANGE,5)
#define COLOR_BROWN  	       	_gtia_mkcolor(HUE_YELLOW,2)
#define COLOR_LIGHTRED       	_gtia_mkcolor(HUE_REDORANGE,6)
#define COLOR_GRAY1  	       	_gtia_mkcolor(HUE_GREY,2)
#define COLOR_GRAY2  	       	_gtia_mkcolor(HUE_GREY,3)
#define COLOR_LIGHTGREEN     	_gtia_mkcolor(HUE_GREEN,6)
#define COLOR_LIGHTBLUE      	_gtia_mkcolor(HUE_BLUE,6)
#define COLOR_GRAY3  	       	_gtia_mkcolor(HUE_GREY,5)

/* color register functions */
extern void __fastcall__ _setcolor     (unsigned char color_reg, unsigned char hue, unsigned char luminace);
extern void __fastcall__ _setcolor_low (unsigned char color_reg, unsigned char color_value);
extern unsigned char __fastcall__ _getcolor (unsigned char color_reg);

/* other screen functions */
extern int  __fastcall__ _graphics (unsigned char mode); /* mode value same as in BASIC */
extern void __fastcall__ _scroll (signed char numlines);
                                          /* numlines > 0  scrolls up */
                                          /* numlines < 0  scrolls down */

/* misc. functions */
extern unsigned char get_ostype(void);  /* get ROM version */
extern unsigned char get_tv(void);      /* get TV system */
extern void _save_vecs(void);           /* save system vectors */
extern void _rest_vecs(void);           /* restore system vectors */
extern char *_getdefdev(void);          /* get default floppy device */

/* global variables */
extern unsigned char _dos_type;        /* the DOS flavour */

/* provide old names for backwards compatibility */
#ifdef ATARI_COMPAT_PRE_2_11
#define setcolor     _setcolor
#define setcolor_low _setcolor_low
#define getcolor     _getcolor
#define graphics     _graphics
#define scroll       _scroll
#define save_vecs    _save_vecs
#define rest_vecs    _rest_vecs
#define getdefdev    _getdefdev
#endif  /* #ifdef ATARI_COMPAT_PRE_2_11 */

/* get_ostype return value defines (for explanation, see ostype.s) */
/* masks */
#define AT_OS_TYPE_MAIN  7
#define AT_OS_TYPE_MINOR (7 << 3)
/* AT_OS_TYPE_MAIN values */
#define AT_OS_UNKNOWN  0
#define AT_OS_400800   1
#define AT_OS_1200XL   2
#define AT_OS_XLXE     3
/* AS_OS_TYPE_MINOR values */
/* for 400/800 remember this are the ROM versions */
/* to check whether the hw is PAL or NTSC, use get_tv() */
#define AT_OS_400800PAL_A  1
#define AT_OS_400800PAL_B  2
#define AT_OS_400800NTSC_A 1
#define AT_OS_400800NTSC_B 2
#define AT_OS_1200_10  1
#define AT_OS_1200_11  2
#define AT_OS_XLXE_1   1
#define AT_OS_XLXE_2   2
#define AT_OS_XLXE_3   3
#define AT_OS_XLXE_4   4

/* get_tv return values */
#define AT_NTSC     0
#define AT_PAL      1

/* valid _dos_type values */
#define ATARIDOS    0
#define SPARTADOS   1
#define OSADOS      2
#define MYDOS       3
#define NODOS       255

/* Define hardware */
#include <_gtia.h>
#define GTIA_READ  (*(struct __gtia_read*)0xD000)
#define GTIA_WRITE (*(struct __gtia_write*)0xD000)

#include <_pbi.h>

#include <_pokey.h>
#define POKEY_READ  (*(struct __pokey_read*)0xD200)
#define POKEY_WRITE (*(struct __pokey_write*)0xD200)

#include <_pia.h>
#define PIA (*(struct __pia*)0xD300)

#include <_antic.h>
#define ANTIC (*(struct __antic*)0xD400)

/* device control block */
struct __dcb {
    unsigned char device;     /* device id */
    unsigned char unit;       /* unit number */
    unsigned char command;    /* command */
    unsigned char status;     /* command type / status return */
    void          *buffer;    /* pointer to buffer */
    unsigned char timeout;    /* device timeout in seconds */
    unsigned char unused;
    unsigned int  xfersize;   /* # of bytes to transfer */
    unsigned char aux1;       /* 1st command auxiliary byte */
    unsigned char aux2;       /* 2nd command auxiliary byte */
};
#define DCB (*(struct __dcb *)0x300)

/* I/O control block */
struct __iocb {
    unsigned char handler;    /* handler index number (0xff free) */
    unsigned char drive;      /* device number (drive) */
    unsigned char command;    /* command */
    unsigned char status;     /* status of last operation */
    void          *buffer;    /* pointer to buffer */
    void          *put_byte;  /* pointer to device's PUT BYTE routine */
    unsigned int  buflen;     /* length of buffer */
    unsigned char aux1;       /* 1st auxiliary byte */
    unsigned char aux2;       /* 2nd auxiliary byte */
    unsigned char aux3;       /* 3rd auxiliary byte */
    unsigned char aux4;       /* 4th auxiliary byte */
    unsigned char aux5;       /* 5th auxiliary byte */
    unsigned char spare;      /* spare byte */
};
#define ZIOCB (*(struct __iocb *)0x20)  /* zero page IOCB */
#define IOCB (*(struct __iocb *)0x340)  /* system IOCB buffers */

/* End of atari.h */
#endif /* #ifndef _ATARI_H */
