/* -*- C -*-
 *
 * cia2.def - Definitions for the second MOS6526 (CIA) chip in the C64
 * ($DD00).
 *
 * Written by
 *   André Fachat (fachat@physik.tu-chemnitz.de)
 *   Ettore Perazzoli (ettore@comm2000.it)
 *
 * This file is part of VICE, the Versatile Commodore Emulator.
 * See README for copyright notice.
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA
 *  02111-1307  USA.
 * */

/* Header for building cia2.c (CIA #2 emulation in the C64). */


#define mycpu maincpu

#define myclk maincpu_clk

#define mycia cia2

#define MYCIA CIA2

#define READ_SDR

#define STORE_SDR


/* #define CIA2_TIMER_DEBUG */

#define	cia2_set_int_clk		maincpu_set_nmi_clk
#define	CIA2_INT			IK_NMI

INCLUDES()
{
    #include "true1541.h"
    #include "c64mem.h"
    #include "c64iec.h"
    #include "c64cia.h"
#ifdef HAVE_PRINTER
    #include "pruser.h"
#endif
#ifdef HAVE_RS232
    #include "rsuser.h"
#endif
}

PRE_CIA_FUNCS()
{
    static iec_info_t *iec_info;
}

RESET_CIA()
{
#ifdef HAVE_PRINTER
    userport_printer_write_strobe(1);
    userport_printer_write_data(0xff);
#endif
#ifdef HAVE_RS232
    userport_serial_write_ctrl(0xff);
#endif
    iec_info = iec_get_drive_port();
}

STORE_CIAPA()
{
    if (cia2[addr] != byte) {
	 BYTE tmp;

	 cia2[addr] = byte;
	 tmp = ~cia2[CIA_PRA] & cia2[CIA_DDRA];
	 mem_set_vbank(tmp & 3);
	 iec_cpu_write(tmp);
#ifdef HAVE_PRINTER
	 userport_printer_write_strobe(tmp & 0x04);
#endif
    }
}

STORE_CIAPB()
{
    cia2[addr] = byte;
    byte = cia2[CIA_PRB] | ~cia2[CIA_DDRB];
    if (true1541_parallel_cable_enabled)
	parallel_cable_cpu_write(byte, ((addr == CIA_PRB) ? 1 : 0));
#ifdef HAVE_PRINTER
    userport_printer_write_data(byte);
#endif
#ifdef HAVE_RS232
    userport_serial_write_ctrl(byte);
#endif
}

READ_CIAPA()
{
    if (!true1541_enabled)
	return ((cia2[CIA_PRA] | ~cia2[CIA_DDRA]) & 0x3f) |
	    (iec_info->iec_fast_1541 & 0x30) << 2;
    true1541_cpu_execute();
    byte = ((cia2[CIA_PRA] | ~cia2[CIA_DDRA]) & 0x3f) | iec_info->cpu_port;
}

READ_CIAPB()
{
#ifdef HAVE_RS232
    byte = (true1541_parallel_cable_enabled
            ? parallel_cable_cpu_read()
            : (rsuser_enabled
		? userport_serial_read_ctrl()
		: cia2[CIA_PRB] | ~cia2[CIA_DDRB]));
#else
    byte = (true1541_parallel_cable_enabled
            ? parallel_cable_cpu_read()
            : cia2[CIA_PRB] | ~cia2[CIA_DDRB]);
#endif
}

READ_CIAICR()
{
    if (true1541_parallel_cable_enabled)
	true1541_cpu_execute();
}

POST_CIA_FUNCS()
{

#ifdef HAVE_PRINTER
void userport_printer_set_busy(int flank)
{
    if(!flank) {
	cia2_set_flag();
    }
}
#endif

}