init.c

一个两碟控制的VCD的代码,两碟之间的转动及连续播放,已大量生产的CODE.

/* SCCSID @(#)init.c	1.20 7/9/98 */ 

 

/**************************************************************************
 *
 * Copyright 1996, ESS Technology, Inc.
 *
 *************************************************************************/



#include <stdio.h>
#include "../common.h"
#include "util.h"
#include "display.h"
#include "dispinfo.h"
#include "graapi.h"
#include "palette.h"
#include "buffer.h"
#include "low.h"
#include "../sysinfo.h"
#ifdef OSD 
#include "osd.h" 
#endif
#include "../vcxi.h"
#include "../dsc.h"

#ifdef DSC
#define IS_POWER_DOWN   (DSC_status == DSC_STATUS_STANDBY)
#endif

#define	EPRINTF(a) 

/************************************************************************
 * Function prototype							
 ************************************************************************/
void evd_trap0(void);

/************************************************************************
 * Global variables							
 ************************************************************************/
#if 0
int	vcx_standard = VCX_MPEG;	/* Required by VC		*/
int	vcx_code_type = VCX_DECODE;	/* Required by VC		*/
#endif

void	(*fptr)() = evd_trap0;     /* Point to the interrupt handler routine*/

extern int mvd_version;     		/* Current chip version */
extern int vcd30_cwdloc;

/*
*/
int init()
{
    int i, j=0, *a, *b;
    int xfer_mode, xport_type;
    int *ptr, *ptr2;
    int key;
    extern unsigned long _heapbase;
    extern int *RISC_cache_realtime, *RISC_ptr_realtime, vcx_timer_val;

#ifdef COMPRESS
    {
    	extern volatile unsigned long Decompress_code_start ;

    	Decompress_code_start = Decompress_code_start>>2;
    	decompress_ROMdata(vcx_drvdatastart, 0x1a000);
    	vcx_drvdatastart = 0x1a000; 
    }
#endif

    /* All low level initialization. */
    mvd[riface_irqmask] = 0xc000;	/* disable irqs */

    EVD_VP_init();

#ifdef MIDI
    EVD_DISP_change_resolution(352, vcx_scn_height, RGB_NTSC);
#else
    EVD_DISP_change_resolution(352, vcx_scn_height, RGB_PAL);
#endif
    /* Close screen output */
    mvd[vid_scn_vstart] = vcx_scn_vstart + vcx_scn_height ;
    mvd[vid_scn_vend] = vcx_scn_vstart + vcx_scn_height + 1;

#ifdef MIDI
    PCM_init();
#else
    EVD_PCM_clear_zero_buffer();
#endif

#if 0
    CUST_init();
#endif

#ifdef OSD
    EVD_OSD_init();
#endif

    /* Install interrupt handler */
#ifdef MKROM
    b = (int*)((int)fptr<<2);
#else
    b = (int*)((int)fptr);
#endif
    b = (int*)((int)fptr<<2);
    /* 
     * The DWORD at 0x18 is used for resume!!
     * The DWORD at 0x1c is used for real-time clock!! 
     *
     * Don't read 0x10 to 0x1f, they meant to be noncachable.
     */
    for (a = (int*)0, i = 0; i < 4; i++)
      *a++ = *b++;

#ifdef IR
    enable_int(debug);
#endif

    /* Start watch dog timer */
    mvd[riface_clear_timer2] = 0;
    mvd[riface_timer2] = vcx_timer_val;
    
#if 0
    /* Mask off junk */
    *RISC_cache_realtime = (*RISC_ptr_realtime &= x00ffffff);

    /* Enable interrupts: timer and suppress irq during opcode load */
    RISC_start_timer2();
#endif
    enable_int(tim2);

#ifdef SERVO2545
    RISC_start_timer1();
#endif

#if 0

    /*
     * For safety! In case someone changed DSC_SELECT when setting
     * AUX pins, we want to set it bad (don't use DSC_getstatus since
     * status may have changed by DSC_init)
     */

    DSC_SELECT;
    /* If we are in power down mode, stay here! */
    if (IS_POWER_DOWN) {
        while (key != POWER_KEY) {
            if (key > 0x100) key &= 0xff;
#ifdef NO_MICRO
	    microEngine();
#endif
            key = get_keycode();
        }
#ifdef ENREACH
	vcd30_cwdloc = 0;
#endif
#ifdef NO_MICRO
        Waiting_powerkey_up();
#endif
        process_power_off_key();
    }

#endif


    WrPaletteToDM();

    /* Paint screen black */
    GPClearScrn(0);
    ShowPage();

    Change_TV_Param();
    /* Enable interrupts */
    enable_int(vout);
    enable_int(buscon);
    enable_int(xport);

#ifdef MIDI
    PCM_stop_take_out();
    LOW_turn_off_audio();
    LOW_turn_on_audio();
    buscon_irq_disable(d2a);
#endif


#ifdef CD_LOAD
#ifndef ENREACH
    initCD();
    xfer_mode = XFER_init(-1);
    xport_type = XPORT_init(-1, xfer_mode);
#endif
#endif

    EVD_main();

    return(0);
}

#if 0
/*
 * Detect current TV mode setting and set vcx_scn_height
 */
void Detect_TV_mode()
{
    PREPARE_DETECTION;

    if (DETECT_NTSC) vcx_scn_height = 240;
        else vcx_scn_height = 288;
}
#endif