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Annotation of 43BSD/sys/vaxif/if_cssreg.h, revision 1.1.1.1

1.1       root        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"

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