crtc6845.h

这个是延伸mame的在wince平台下的游戏模拟器的代码

/**********************************************************************

        Motorola 6845 CRT Controller interface and emulation

        This function emulates the functionality of a single
        crtc6845.

**********************************************************************/


#ifdef CRTC6845_C
	int crtc6845_address_latch=0;
	int crtc6845_horiz_total=0;
	int crtc6845_horiz_disp=0;
	int crtc6845_horiz_sync_pos=0;
	int crtc6845_sync_width=0;
	int crtc6845_vert_total=0;
	int crtc6845_vert_total_adj=0;
	int crtc6845_vert_disp=0;
	int crtc6845_vert_sync_pos=0;
	int crtc6845_intl_skew=0;
	int crtc6845_max_ras_addr=0;
	int crtc6845_cursor_start_ras=0;
	int crtc6845_cursor_end_ras=0;
	int crtc6845_start_addr=0;
	int crtc6845_cursor=0;
	int crtc6845_light_pen=0;
	int crtc6845_page_flip=0;		/* This seems to be present in the HD46505 */

#else
	extern int crtc6845_address_latch;
	extern int crtc6845_horiz_total;
	extern int crtc6845_horiz_disp;
	extern int crtc6845_horiz_sync_pos;
	extern int crtc6845_sync_width;
	extern int crtc6845_vert_total;
	extern int crtc6845_vert_total_adj;
	extern int crtc6845_vert_disp;
	extern int crtc6845_vert_sync_pos;
	extern int crtc6845_intl_skew;
	extern int crtc6845_max_ras_addr;
	extern int crtc6845_cursor_start_ras;
	extern int crtc6845_cursor_end_ras;
	extern int crtc6845_start_addr;
	extern int crtc6845_cursor;
	extern int crtc6845_light_pen;
	extern int crtc6845_page_flip;
#endif

int  crtc6845_register_r(int address);
void crtc6845_address_w(int address, int data);
void crtc6845_register_w(int address, int data);