Current File : //usr/share/src/uts/i86pc/sys/cram.h

/*	Copyright (c) 1990, 1991 UNIX System Laboratories, Inc.	*/
/*	Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T	*/
/*	  All Rights Reserved  	*/

#ifndef _SYS_CRAM_H
#define	_SYS_CRAM_H

#include <sys/types.h>
#include <sys/ksynch.h>
#include <sys/kmem.h>

#ifdef	__cplusplus
extern "C" {
#endif

/*
 * Defines for accessing the PC AT CMOS ram.
 */

#define	CMOS_ADDR	0x70	/* I/O port address for CMOS ram address */
#define	CMOS_DATA	0x71	/* I/O port address for CMOS ram data */

#define	DSB		0x0e	/* Diagnostic status byte ram address */
#define	SSB		0x0f	/* Shutdown status byte ram address */
#define	DDTB		0x10	/* Diskette drive type byte ram address */
#define	FDTB		0x12	/* Fixed disk type byte ram address */
#define	EB		0x14	/* Equipment byte ram address */
#define	BMLOW		0x15	/* Base mem size low byte ram address */
#define	BMHIGH		0x16	/* Base mem size high byte ram address */
#define	EMLOW		0x17	/* Expansion mem size low byte ram address */
#define	EMHIGH		0x18	/* Expansion mem size high byte ram address */
#define	DCEB		0x19	/* Drive C Extended byte ram address */
#define	DDEB		0x1a	/* Drive D Extended byte ram address */
#define	CKSUMLOW	0x2e	/* Checksum low byte ram address */
#define	CKSUMHIGH	0x2f	/* Checksum high byte ram address */
#define	EMLOW2		0x30	/* Expansion mem size low byte ram address */
#define	EMHIGH2		0x31	/* Expansion mem size high byte ram address */
#define	DCB		0x32	/* Date century byte ram address */
#define	IF		0x33	/* Information flag ram address */

/*
 * ioctls for accessing CMOS ram.
 */
#define	CMOSIOC	('C' << 8)

#define	CMOSREAD	(CMOSIOC | 0x01)
#define	CMOSWRITE	(CMOSIOC | 0x02)

extern unsigned char	CMOSread();

/* Ports for interacting with chip at */

#define	CMOSADDR	0x70 	/* Use to select RAM address */
#define	CMOSDATA	0x71	/* R/W data */

/* Number of cmos bytes */

#define	CMOSSIZE	0x40	/* 64 addressable bytes in chip */

/* Addresses of interest */

#define	CMOSDIAG	0x0e	/* Diagnostic Status */
#define	CMOSFDT		0x10	/* Floppy Disk Type */
#define	CMOSHDT		0x12	/* Hard Disk Type; bits 7-4 are 1st drive */
#define	CMOSEQP		0x14	/* Diskette, Video, and CoProcessor info */
#define	CMOSADF		0x2d	/* Additional flags - Compaq VDU info */

/* Shifts of interest */

#define	VID_SHFT	4	/* Shift display type bits into 0-3 */

/* masks of interest */
#define	CMPQVDU		0x04	/* Compaq VDU bit */
#define	CMPQDMM		0x01	/* Compaq Dual Mode Monitor bit */

#ifdef	__cplusplus
}
#endif

#endif	/* _SYS_CRAM_H */