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: * @(#)if_cssreg.h 7.1 (Berkeley) 6/5/86
7: */
8:
9: /*
10: * DEC/CSS IMP11-A ARPAnet interface
11: */
12:
13: struct cssdma {
14: short wc; /* word count */
15: u_short ba; /* bus address (low 16 bits) */
16: short csr; /* status register */
17: short db; /* data buffer*/
18: };
19:
20: struct cssdevice {
21: struct cssdma css_output; /* transmit DR11-B */
22: struct cssdma css_hole; /* unclever gap */
23: struct cssdma css_input; /* receive DR11-B */
24: };
25:
26: #define css_icsr css_input.csr
27: #define css_iba css_input.ba
28: #define css_iwc css_input.wc
29: #define css_ocsr css_output.csr
30: #define css_oba css_output.ba
31: #define css_owc css_output.wc
32:
33: /*
34: * Bits Common to both input and out CSR's
35: */
36: #define CSS_ERR 0x8000 /* error present */
37: #define CSS_NXM 0x4000 /* non-existant memory */
38: #define CSS_ATTN 0x2000 /* attention */
39: #define CSS_MAINT 0x1000 /* maintenance mode */
40: #define CSS_CYCLE 0x0100 /* force bus cycle */
41: #define CSS_RDY 0x0080 /* ready */
42: #define CSS_IE 0x0040 /* interrupt enable */
43: #define CSS_XA 0x0030 /* extended address bits */
44: #define CSS_CLR 0x0020 /* clear status (reset) */
45: #define CSS_GO 0x0001 /* start operation */
46:
47: /*
48: * Input Control Status Register
49: */
50: #define IN_EOM 0x0800 /* end-of-message recieved */
51: #define IN_IMPNR 0x0400 /* IMP not ready */
52: #define IN_RLE 0x0200 /* ready line error */
53: #define IN_WEN 0x0008 /* write enable */
54: #define IN_HRDY 0x0004 /* host ready */
55:
56: #define CSS_INBITS \
57: "\20\20ERR\17NXM\16ATTN\15MAINT\14EOM\13IMPNR\12RLE\11CYCLE\10RDY\7IE\6XBA17\5XBA16\4WE\3HRDY\2CLR\1GO"
58:
59:
60: /*
61: * Output Control Status Register
62: */
63: #define OUT_TXEC 0x0008 /* tx error clear */
64: #define OUT_ENLB 0x0004 /* enable last bit */
65:
66: #define CSS_OUTBITS \
67: "\20\20ERR\17NXM\16ATTN\15MAINT\11CYCLE\10RDY\7IE\6XBA17\5XBA16\4TXEC\3ENLB\2CLR\1GO"
Defined struct's
Defined macros
Usage of this include