xref: /original-bsd/sys/vax/uba/dhreg.h (revision 9b4c0013)
1 /*
2  * Copyright (c) 1982, 1986 Regents of the University of California.
3  * All rights reserved.  The Berkeley software License Agreement
4  * specifies the terms and conditions for redistribution.
5  *
6  *	@(#)dhreg.h	7.1 (Berkeley) 06/05/86
7  */
8 
9 /*
10  * DH-11 device register definitions.
11  */
12 struct dhdevice {
13 	union {
14 		short	dhcsr;		/* control-status register */
15 		char	dhcsrl;		/* low byte for line select */
16 	} un;
17 	short	dhrcr;			/* receive character register */
18 	short	dhlpr;			/* line parameter register */
19 	u_short dhcar;			/* current address register */
20 	short	dhbcr;			/* byte count register */
21 	u_short	dhbar;			/* buffer active register */
22 	short	dhbreak;		/* break control register */
23 	short	dhsilo;			/* silo status register */
24 };
25 
26 /* Bits in dhcsr */
27 #define	DH_TI	0100000		/* transmit interrupt */
28 #define	DH_SI	0040000		/* storage interrupt */
29 #define	DH_TIE	0020000		/* transmit interrupt enable */
30 #define	DH_SIE	0010000		/* storage interrupt enable */
31 #define	DH_MC	0004000		/* master clear */
32 #define	DH_NXM	0002000		/* non-existant memory */
33 #define	DH_MM	0001000		/* maintenance mode */
34 #define	DH_CNI	0000400		/* clear non-existant memory interrupt */
35 #define	DH_RI	0000200		/* receiver interrupt */
36 #define	DH_RIE	0000100		/* receiver interrupt enable */
37 
38 /* Bits in dhlpr */
39 #define	BITS6	01
40 #define	BITS7	02
41 #define	BITS8	03
42 #define	TWOSB	04
43 #define	PENABLE	020
44 /* DEC manuals incorrectly say this bit causes generation of even parity. */
45 #define	OPAR	040
46 #define	HDUPLX	040000
47 
48 #define	DH_IE	(DH_TIE|DH_SIE|DH_RIE)
49 
50 /* Bits in dhrcr */
51 #define	DH_PE		0010000		/* parity error */
52 #define	DH_FE		0020000		/* framing error */
53 #define	DH_DO		0040000		/* data overrun */
54