libx48ng/src/hp48.h

/*
 *  This file is part of x48, an emulator of the HP-48sx Calculator.
 *  Copyright (C) 1994  Eddie C. Dost  (ecd@dressler.de)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/* $Log: hp48.h,v $
 * Revision 1.11  1995/01/11  18:20:01  ecd
 * major update to support HP48 G/GX
 *
 * Revision 1.10  1994/11/28  02:19:22  ecd
 * added function serial_baud()
 *
 * Revision 1.10  1994/11/28  02:19:22  ecd
 * added function serial_baud()
 *
 * Revision 1.9  1994/11/02  14:51:27  ecd
 * minor changes
 *
 * Revision 1.8  1994/10/09  20:26:35  ecd
 * changed display_t: display.skip --> display.nibs_per_line
 *
 * Revision 1.7  1994/10/05  08:33:22  ecd
 * added do_interupt definition
 *
 * Revision 1.6  1994/09/30  12:32:49  ecd
 * added some fields for REALTIME support,
 * added Scheduler stuff
 *
 * Revision 1.5  1994/09/18  15:31:58  ecd
 * started Real Time support
 *
 * Revision 1.4  1994/09/13  16:58:42  ecd
 * changed to plain X11
 *
 * Revision 1.3  1994/08/31  18:25:23  ecd
 * added read_nibble_crc
 *
 * Revision 1.2  1994/08/27  11:29:48  ecd
 * changed keyboard interrupt handling.
 *
 * Revision 1.1  1994/08/26  11:09:18  ecd
 * Initial revision
 *
 *
 *
 * $Id: hp48.h,v 1.11 1995/01/11 18:20:01 ecd Exp ecd $
 */

#ifndef _HP48_H
#define _HP48_H 1

#include "global.h"

#include <sys/time.h>

#include "mmu.h"
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif

#define RAM_SIZE_SX 0x10000
#define RAM_SIZE_GX 0x40000

#define P_FIELD 0
#define WP_FIELD 1
#define XS_FIELD 2
#define X_FIELD 3
#define S_FIELD 4
#define M_FIELD 5
#define B_FIELD 6
#define W_FIELD 7
#define A_FIELD 15
#define IN_FIELD 16
#define OUT_FIELD 17
#define OUTS_FIELD 18

#define DEC 10
#define HEX 16

#define NR_RSTK 8
#define NR_PSTAT 16

typedef unsigned char word_1;
typedef unsigned char word_4;
typedef unsigned char word_8;
typedef unsigned short word_12;
typedef unsigned short word_16;
typedef long word_20;
typedef long word_32;

#ifdef HAVE_STDINT_H
#define SIMPLE_64
typedef int64_t word_64;
#else
typedef struct word_64 {
    unsigned long hi, lo;
} word_64;
#endif

typedef struct keystate_t {
    short rows[ 9 ];
} keystate_t;

typedef struct display_t {

    int on;

    long disp_start;
    long disp_end;

    int offset;
    int lines;
    int nibs_per_line;

    int contrast;

    long menu_start;
    long menu_end;

    int annunc;

} display_t;

typedef struct mem_cntl_t {
    unsigned short unconfigured;
    word_20 config[ 2 ];
} mem_cntl_t;

typedef struct saturn_t {

    unsigned long magic;
    char version[ 4 ];

    unsigned char A[ 16 ], B[ 16 ], C[ 16 ], D[ 16 ];

    word_20 d[ 2 ];

#define D0 d[ 0 ]
#define D1 d[ 1 ]

    word_4 P;
    word_20 PC;

    unsigned char R0[ 16 ], R1[ 16 ], R2[ 16 ], R3[ 16 ], R4[ 16 ];
    unsigned char IN[ 4 ];
    unsigned char OUT[ 3 ];

    word_1 CARRY;

    unsigned char PSTAT[ NR_PSTAT ];
    unsigned char XM, SB, SR, MP;

    word_4 hexmode;

    word_20 rstk[ NR_RSTK ];
    short rstkp;

    keystate_t keybuf;

    unsigned char intenable;
    unsigned char int_pending;
    unsigned char kbd_ien;

    word_4 disp_io;

    word_4 contrast_ctrl;
    word_8 disp_test;

    word_16 crc;

    word_4 power_status;
    word_4 power_ctrl;

    word_4 mode;

    word_8 annunc;

    word_4 baud;

    word_4 card_ctrl;
    word_4 card_status;

    word_4 io_ctrl;
    word_4 rcs;
    word_4 tcs;

    word_8 rbr;
    word_8 tbr;

    word_8 sreq;

    word_4 ir_ctrl;

    word_4 base_off;

    word_4 lcr;
    word_4 lbr;

    word_4 scratch;

    word_4 base_nibble;

    word_20 disp_addr;
    word_12 line_offset;
    word_8 line_count;

    word_16 unknown;

    word_4 t1_ctrl;
    word_4 t2_ctrl;

    word_20 menu_addr;

    word_8 unknown2;

    char timer1; /* may NOT be unsigned !!! */
    word_32 timer2;

    long t1_instr;
    long t2_instr;

    short t1_tick;
    short t2_tick;
    long i_per_s;

    short bank_switch;
    mem_cntl_t mem_cntl[ NR_MCTL ];

    unsigned char* rom;
    unsigned char* ram;
    unsigned char* port1;
    unsigned char* port2;

} saturn_t;

#define NIBBLES_PER_ROW 0x22

extern int got_alarm;

extern int set_t1;
extern long sched_timer1;
extern long sched_timer2;

extern int adj_time_pending;
extern long sched_adjtime;
extern long schedule_event;

extern display_t display;
extern void init_display( void );

extern saturn_t saturn;

extern int exit_emulator( void );
extern int init_emulator( void );
extern void init_active_stuff( void );

extern int serial_init( void );
extern void serial_baud( int baud );
extern void transmit_char( void );
extern void receive_char( void );

extern void do_kbd_int( void );
extern void do_interupt( void );

extern void ( *write_nibble )( long addr, int val );
extern int ( *read_nibble )( long addr );
extern int ( *read_nibble_crc )( long addr );

extern int emulate( void );
extern int step_instruction( void );
extern void schedule( void );

extern int read_rom( const char* fname );
extern int read_files( void );
extern int write_files( void );

extern void load_addr( word_20* dat, long addr, int n );
#endif /* !_HP48_H */