1 /*        $NetBSD: dlreg.h,v 1.6 2005/12/11 12:23:29 christos Exp $   */
2 /*
3  * Ben Harris, 1997
4  *
5  * This file is in the Public Domain.
6  */
7 /*
8  * dlreg.h -- Definitions for the DL11 and DLV11 serial cards.
9  *
10  * Style in imitation of dzreg.h.
11  */
12 
13 #ifdef notdef
14 union w_b
15 {
16           u_short word;
17           struct {
18                     u_char byte_lo;
19                     u_char byte_hi;
20           } bytes;
21 };
22 
23 struct DLregs
24 {
25           volatile u_short dl_rcsr; /* Receive Control/Status Register (R/W) */
26           volatile u_short dl_rbuf; /* Receive Buffer (R) */
27           volatile u_short dl_xcsr; /* Transmit Control/Status Register (R/W) */
28           volatile union w_b u_xbuf; /* Transmit Buffer (W) */
29 #define dl_xbuf u_xbuf.bytes.byte_lo
30 };
31 
32 typedef struct DLregs dlregs;
33 #endif
34 
35 #define   DL_UBA_RCSR         0
36 #define   DL_UBA_RBUF         2
37 #define   DL_UBA_XCSR         4
38 #define   DL_UBA_XBUFL        6
39 
40 /* RCSR bits */
41 
42 #define DL_RCSR_RX_DONE                 0x0080 /* Receiver Done (R) */
43 #define DL_RCSR_RXIE                    0x0040 /* Receiver Interrupt Enable (R/W) */
44 #define DL_RCSR_READER_ENABLE 0x0001 /* [paper-tape] Reader Enable (W) */
45 #define DL_RCSR_BITS                    "\20\1READER_ENABLE\7RXIE\10RX_DONE\n"
46 
47 /* RBUF bits */
48 
49 #define DL_RBUF_ERR           0x8000 /* Error (R) */
50 #define DL_RBUF_OVERRUN_ERR   0x4000 /* Overrun Error (R) */
51 #define DL_RBUF_FRAMING_ERR   0x2000 /* Framing Error (R) */
52 #define DL_RBUF_PARITY_ERR    0x1000 /* Parity Error (R) */
53 #define DL_RBUF_DATA_MASK     0x00FF /* Receive Data (R) */
54 #define DL_RBUF_BITS          "\20\15PARITY_ERR\16FRAMING_ERR\17OVERRUN_ERR\20ERR\n"
55 
56 /* XCSR bits */
57 
58 #define DL_XCSR_TX_READY      0x0080 /* Transmitter Ready (R) */
59 #define DL_XCSR_TXIE                    0x0040 /* Transmit Interrupt Enable (R/W) */
60 #define DL_XCSR_TX_BREAK      0x0001 /* Transmit Break (R/W) */
61 #define DL_XCSR_BITS                    "\20\1TX_BREAK\7TXIE\10TX_READY\n"
62 
63 /* XBUF is just data byte right justified. */
64