dmreg.h

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· C头文件 代码 · 共 40 行

/* @(#)dmreg.h	4.1	(ULTRIX)	7/2/90	*/
/*	dmreg.h	6.1	83/07/29	*/

/*
 * DM-11 device register definitions.
 */
struct dmdevice {
	short	dmcsr;		/* control status register */
	short	dmlstat;	/* line status register */
	short	dmpad1[2];
};

/* bits in dm csr */
#define	DM_RF		0100000		/* ring flag */
#define	DM_CF		0040000		/* carrier flag */
#define	DM_CTS		0020000		/* clear to send */
#define	DM_SRF		0010000		/* secondary receive flag */
#define	DM_CS		0004000		/* clear scan */
#define	DM_CM		0002000		/* clear multiplexor */
#define	DM_MM		0001000		/* maintenance mode */
#define	DM_STP		0000400		/* step */
#define	DM_DONE		0000200		/* scanner is done */
#define	DM_IE		0000100		/* interrupt enable */
#define	DM_SE		0000040		/* scan enable */
#define	DM_BUSY		0000020		/* scan busy */

/* bits in dm lsr */
#define	DML_RNG		0000200		/* ring */
#define	DML_CAR		0000100		/* carrier detect */
#define	DML_CTS		0000040		/* clear to send */
#define	DML_SR		0000020		/* secondary receive */
#define	DML_ST		0000010		/* secondary transmit */
#define	DML_RTS		0000004		/* request to send */
#define	DML_DTR		0000002		/* data terminal ready */
#define	DML_LE		0000001		/* line enable */

#define	DML_ON		(DML_DTR|DML_RTS|DML_LE)
#define	DML_OFF		(DML_LE)