low.h

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 @(#)low.h	1.19 12/15/97 */

/*
 * $Log$
 */

void LOW_init_rdma(void);
void LOW_init_buscon(void);
void LOW_init_dram(void);
void LOW_init_gateway(void);
void LOW_init_audio(void);
void LOW_init_private_dma(void);
void LOW_init_riface(void);
void LOW_set_audio_sampling_frequency(int freq_code);
void LOW_set_buscon_dma_width3(ushort new_value);

GBLDEF(int gbl_gate_fiforeset, 0x3ff);
GBLDEF_0(int gbl_gate_control,0x0);
GBLDEF_0(int prev_sampling_frequency, 0);

#ifdef AUDIOCLK
#define AUDIOCTL_RESET 0x78
#else
#define AUDIOCTL_RESET 0x38
#endif

#ifdef SPDIF
/* MVD2 with 512FS */
#define LOW_reset_audio_port() do {	\
    int *cs8401a = (int *)0x14000100;	\
    mvd[audioctl] = AUDIOCTL_RESET;	\
    cs8401a[2] = 0x80;			\
    cs8401a[2] = 0x83;			\
    CLEAR_AUX7;				\
    SET_AUX7;				\
} while (0)

#else

#define LOW_reset_audio_port() mvd[audioctl] = AUDIOCTL_RESET

#endif	/* SPDIF */

#define gate_d2a_ff_status	gate_audioout_ff_status
#define gate_d2a_ff_vals	gate_audioout_ff_vals
#define gate_d2a_bit		0x100