/*
 * SccsID = @(#)egaports.h	1.17 10/21/92 Copyright Insignia Solutions Ltd.
 */

#ifdef	EGG
	/* defined in ega_write.c : */
	extern void ega_write_init IPT0();
	extern void ega_write_term IPT0();
	extern void ega_write_routines_update IPT1(CHANGE_TYPE,c);

#ifdef V7VGA
/* The video seven VGA board has extra memory, but the CRTC does not cross
 * bank boundaries unless the counter bank enable bit is set. 
 * This means that the size as far as wrapping and displaying is concerned is 
 * only one bank unless that bit is set.
 */
#define	EGA_PLANE_SIZE	0x20000
#define EGA_PLANE_DISP_SIZE  \
	(extensions_controller.ram_bank_select.as_bfld.counter_bank_enable? \
			EGA_PLANE_SIZE:0x10000)
#else
#define	EGA_PLANE_SIZE	0x10000
#define EGA_PLANE_DISP_SIZE EGA_PLANE_SIZE
#endif /* V7VGA */

	extern void ega_init IPT0();
	extern void ega_term IPT0();
	extern void ega_gc_outb_index IPT2(io_addr,ia,half_word,hw);
#ifdef	HUNTER
	extern int ega_get_line_compare IPT0();
	extern int ega_get_max_scan_lines IPT0();
	extern void ega_set_line_compare IPT1(int,i);
#endif
	IMPORT VOID update_banking IPT0();
	IMPORT VOID set_banking IPT2(IU8, rd_bank, IU8, wrt_bank);

	IMPORT VOID set_mark_funcs IPT0();

	extern int ega_int_enable;

	extern byte *EGA_planes;

#define EGA_plane01 EGA_planes
#define EGA_plane23 (EGA_planes+2)
#define EGA_plane0123 EGA_planes

#define FONT_MEM_SIZE	0x2000		/* max no of bytes in font memory block */
#define FONT_MEM_OFF	0x4000		/* mem offset of next font definition from previous */

#define FONT_BASE_ADDR	2

#define FONT_MAX_HEIGHT	32		/* max font support for 32 scanline high fonts */

#ifdef V7VGA
#define   set_v7_bank_for_seq_chain4( rd_bank, wrt_bank )  *(wrt_bank) =  \
			(((extensions_controller.ram_bank_select.as_bfld.cpu_write_bank_select & 1)<<2) \
			| (miscellaneous_output_register.as_bfld.page_bit_odd_even<<1) \
			| extensions_controller.page_select.as_bfld.extended_page_select); \
										*(rd_bank) =  \
			(((extensions_controller.ram_bank_select.as_bfld.cpu_read_bank_select & 1)<<2) \
			| (miscellaneous_output_register.as_bfld.page_bit_odd_even<<1) \
			| extensions_controller.page_select.as_bfld.extended_page_select)
#endif /* V7VGA */

#endif

#if defined(C_VID) || defined(A2CPU)

/*
 *	C_VID variants use the ports code in e/vga_ports.c
 */

#define Cpu_define_outb( port, func )
#else
/* Declare as Import to remove warnings */
#ifdef ANSI
IMPORT VOID Cpu_define_outb(IU16 adapterID, VOID (*asmFunc) IPT2(io_addr, port, half_word, value));
#else
IMPORT VOID Cpu_define_outb IPT2(IU16, adapterID, VOID (*)(), asmFunc);
#endif /* ANSI */
 
#endif /* C_VID || A2CPU */