crl.h

早期freebsd实现

/* 
 * @(#)crl.h	7.1 (Berkeley) 6/5/86
 */

/****************************************************************
 *                                                              *
 *        Licensed from Digital Equipment Corporation           *
 *                       Copyright (c)                          *
 *               Digital Equipment Corporation                  *
 *                   Maynard, Massachusetts                     *
 *                         1985, 1986                           *
 *                    All rights reserved.                      *
 *                                                              *
 *        The Information in this software is subject to change *
 *   without notice and should not be construed as a commitment *
 *   by  Digital  Equipment  Corporation.   Digital   makes  no *
 *   representations about the suitability of this software for *
 *   any purpose.  It is supplied "As Is" without expressed  or *
 *   implied  warranty.                                         *
 *                                                              *
 *        If the Regents of the University of California or its *
 *   licensees modify the software in a manner creating         *
 *   diriviative copyright rights, appropriate copyright        *
 *   legends may be placed on  the drivative work in addition   *
 *   to that set forth above.                                   *
 ****************************************************************/

#if VAX8600
/*
 * Console RL02 status of current transfer (read only)
 */
#define CRL_S_XCMPLT	1		/* transaction complete */
#define CRL_S_XCONT	2		/* continue transaction */
#define CRL_S_ABORT	3		/* transation abort */
#define CRL_S_RETSTS	4		/* return device status */
#define CRL_S_HNDSHK	0x80		/* handshake err during transaction */
#define CRL_S_HWERR	0x81		/* hardware err during transaction */

/*
 * Console RL02 function codes
 */
#define CRL_F_NOOP	0		/* No operation */
#define CRL_F_RSTSTS	2		/* reset and return device status */
#define CRL_F_ABORT	3		/* abort transfer */
#define CRL_F_RETSTS	4		/* read device status */
#define CRL_F_WRITE	5		/* write block data */
#define CRL_F_READ	6		/* read block data */

/*
 * Console sectoring information.
 * The console understands the rl02 as having 512 byte sectors.
 */
#define	CRLBYSEC 512			/* bytes/sector */
#define	MAXSEC 20480		 	/* sectors/rl02 */

/*
 * STXCS bit definitions
 */
#define STXCS_RDY	0x00000080	/* ready bit */
#define STXCS_IE	0x00000040	/* interrupt enable */

#define	CRLERRS		5	/* number of retries before quitting */

/*
 * The state byte is used to retain exclusivity,
 * and contains the busy flag.
 */
#define	CRL_IDLE	0
#define	CRL_OPEN	1
#define	CRL_BUSY	2


#define	CRLDS_BITS \
"\20\20WDE\17CHE\16WL\15SKTO\14SPE\13WGE\12VC\11DSE\
\10DT\7HS\6CO\5HO\4BH\3STC\2STB\1STA"

#define	CRLCS_BITS \
"\20\20CE\17DE\16NXM\15DLT\14DCRC\13OPI\1DRDY"
#endif